10th Class Science Metals and Non-metals / धातु और अधातु Question Bank

done Metals and Non-Metals Total Questions - 135

• question_answer1)
  Which of the following pairs will not give Hydrogen?
  A)
   Al and conc. NaOH solution done clear
  B)
   Zn and dil \[HN{{O}_{3}}\] done clear
  C)
   Sodium and water done clear
  D)
   Zn and dil \[HN{{O}_{3}}\]   done clear
  View Solution play_arrow

• question_answer2)
  When steam is passed over red hot iron
  A)
   no reaction takes place done clear
  B)
   \[{{O}_{2}}\]and Fe \[{{\left( \text{OH} \right)}_{2}}\] are formed done clear
  C)
    \[{{H}_{2}}\] and \[F{{e}_{3}}{{O}_{4}}\] are formed   done clear
  D)
   \[{{H}_{2}}\] and \[F{{e}_{2}}{{O}_{3}}\] are formed done clear
  View Solution play_arrow

• question_answer3)
  Which of the following oxides can be reduced by hydrogen?
  A)
   CaO                       done clear
  B)
          \[N{{a}_{2}}O\] done clear
  C)
   \[A{{l}_{2}}{{O}_{3}}\]                  done clear
  D)
          \[CuO\]   done clear
  View Solution play_arrow

• question_answer4)
  Hydrogen behaves as a metal
  A)
   At low temperature done clear
  B)
   At low pressure done clear
  C)
   At high temperature done clear
  D)
   At high pressure   done clear
  View Solution play_arrow

• question_answer5)
  The most abundant non-metal in the earth's crust is
  A)
   Chlorine              done clear
  B)
   Hydrogen done clear
  C)
   Silicon                  done clear
  D)
          Oxygen   done clear
  View Solution play_arrow

• question_answer6)
  Which of the following alloys is ferrous alloys
  A)
   Bronze           done clear
  B)
          Brass done clear
  C)
   Invar                       done clear
  D)
          Duralumin done clear
  View Solution play_arrow

• question_answer7)
  Metals
  A)
   have luster done clear
  B)
   have 1,2 or 3 electrons in the outermost shell done clear
  C)
   are malleable done clear
  D)
   all of these   done clear
  View Solution play_arrow

• question_answer8)
  Gas which in cold (liquid form) expands on further cooling is
  A)
   Liquid Helium                    done clear
  B)
   Liquid hydrogen   done clear
  C)
   Liquid ammonia done clear
  D)
          Liquid oxygen done clear
  View Solution play_arrow

• question_answer9)
  Which of the following can act as oxidizing agent?
  A)
   \[{{H}_{2}}\]                                        done clear
  B)
   CO done clear
  C)
   Carbon                done clear
  D)
          \[{{H}_{2}}S\] done clear
  View Solution play_arrow

• question_answer10)
  Aluminium reacts with caustic soda to form
  A)
   Sodium meta aluminate   done clear
  B)
   Alumining hydroxide done clear
  C)
   Aluminium oxide done clear
  D)
   Sodium tetra aluminate done clear
  View Solution play_arrow

• question_answer11)
  Alloy formation gives rise to
  A)
   Decrease in corrosion- done clear
  B)
   Increase in hardness done clear
  C)
   Decrease in conductivity done clear
  D)
   All are correct   done clear
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• question_answer12)
  Element which liberates oxygen and ozone from water is
  A)
   P                                            done clear
  B)
   Na done clear
  C)
   F                               done clear
  D)
          \[I\] done clear
  View Solution play_arrow

• question_answer13)
  The second most abundant metal in the earth?s crust is
  A)
   Copper                                done clear
  B)
   Aluminium done clear
  C)
   Iron                         done clear
  D)
          Zinc done clear
  View Solution play_arrow

• question_answer14)
  Metallurgy is a process of extracting ^
  A)
   metal from its mineral done clear
  B)
   metal from its ore done clear
  C)
   pure metal from its ore   done clear
  D)
   metal from its pure ore done clear
  View Solution play_arrow

• question_answer15)
  Matrix is defined as the
  A)
   unwanted foreign material present in the ore   done clear
  B)
   flux added to remove the unwanted impurities from ore done clear
  C)
   slag formed as a result of the reaction of flux with gangue done clear
  D)
   material used in the reduction of metal oxide to metal done clear
  View Solution play_arrow

• question_answer16)
  Phosphorus normally exhibits a covalency of
  A)
   +3 and +5          done clear
  B)
          +2 and +3 done clear
  C)
   +1 and +2        done clear
  D)
          +3 and +4 done clear
  View Solution play_arrow

• question_answer17)
  Which of the following element is most metallic?
  A)
   P                                            done clear
  B)
   As done clear
  C)
   Sb                          done clear
  D)
          Bi   done clear
  View Solution play_arrow

• question_answer18)
  Nitrogen oxide which is paramagnetic, is
  A)
   \[N{{O}_{2}}\]        done clear
  B)
          \[{{N}_{2}}O\] done clear
  C)
   NO                        done clear
  D)
          \[{{N}_{2}}{{O}_{5}}\] done clear
  View Solution play_arrow

• question_answer19)
  When concentrated nitric acid is heated with \[{{P}_{2}}{{O}_{5}}\], it forms
  A)
   \[{{H}_{3}}P{{O}_{4}}\]                 done clear
  B)
   \[N{{O}_{2}}\] done clear
  C)
   \[{{N}_{2}}{{O}_{5}}\]                     done clear
  D)
          NO done clear
  View Solution play_arrow

• question_answer20)
  Which of the following' is an ore of aluminium?
  A)
   Cryolite           done clear
  B)
          Feldspar done clear
  C)
   Bauxite           done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer21)
  Function of adding cryolite in the extraction of aluminium from pure alumina is
  A)
   to increase the fusion temperature done clear
  B)
   to decrease the conductivity of alumina done clear
  C)
   to decrease the fusion temperature and increase the electrical conductivity   done clear
  D)
   none of these done clear
  View Solution play_arrow

• question_answer22)
  Which of following oxides of nitric is anhydride of nitrous acid?
  A)
   NO                        done clear
  B)
          \[{{N}_{2}}{{O}_{3}}\] done clear
  C)
   \[{{N}_{2}}{{O}_{4}}\]                                   done clear
  D)
   \[{{N}_{2}}{{O}_{5}}\]   done clear
  View Solution play_arrow

• question_answer23)
  The chemical formula of bauxite is
  A)
   \[A{{l}_{2}}{{O}_{3}}\]                  done clear
  B)
          \[A{{l}_{2}}{{O}_{3}}.2{{H}_{2}}O\]   done clear
  C)
   \[N{{a}_{3}}Al{{F}_{6}}\]          done clear
  D)
          \[A{{l}_{2}}C{{l}_{6}}\] done clear
  View Solution play_arrow

• question_answer24)
  The metals that cannot be obtained by electrolysis of the aqueous solution of their salts are
  A)
   Ag                          done clear
  B)
          Mg done clear
  C)
   Cu                          done clear
  D)
          Al done clear
  View Solution play_arrow

• question_answer25)
  Which of the following pair is correct?
  A)
   Melachite           Copper done clear
  B)
   Siderite                               Iron done clear
  C)
   Galena                                 Lead done clear
  D)
   All of these   done clear
  View Solution play_arrow

• question_answer26)
  Aluminium is used in thermite welding because it
  A)
   is a light metal done clear
  B)
   has more affinity for oxygen   done clear
  C)
   is a strong oxidising agent done clear
  D)
   is a reactive metal done clear
  View Solution play_arrow

• question_answer27)
  Ammonium dichromate on heating gives
  A)
   chromic oxide and nitrogen   done clear
  B)
   chromic acid and ammonia done clear
  C)
   chromic acid and nitrogen done clear
  D)
   chromic oxide and ammonia done clear
  View Solution play_arrow

• question_answer28)
  When a mixture of cone. \[\text{HN}{{\text{O}}_{3}}\]and \[HCl\] warmed, we get                     
  A)
   \[C{{l}_{2}},N{{O}_{2}}\,and\,{{H}_{2}}O\]                 done clear
  B)
   \[NO,C{{l}_{2}}\,and\,{{H}_{2}}O\]                   done clear
  C)
   \[NOCl,C{{l}_{2}}\,and\,N{{O}_{2}}\] done clear
  D)
                     \[NOCl,C{{l}_{2}}\,and\,{{H}_{2}}O\]                  done clear
  View Solution play_arrow

• question_answer29)
  The salt which is least likely to be found mineral is is
  A)
   chloride               done clear
  B)
   sulphate done clear
  C)
   sulphide          done clear
  D)
          nitrate   done clear
  View Solution play_arrow

• question_answer30)
  Copper does not react with dilute \[HCl\] but reacts in the presence of air or oxygen because
  A)
   copper is ranked lower than hydrogen in the activity series done clear
  B)
   \[HCl\] is not an oxidising agent done clear
  C)
   air or oxygen oxidises the copper metal to copper (+ 2) ion done clear
  D)
   all of these   done clear
  View Solution play_arrow

• question_answer31)
  Phosphorus is stored in
  A)
   water                                     done clear
  B)
   ammonia done clear
  C)
   alcohol           done clear
  D)
          kerosene oil done clear
  View Solution play_arrow

• question_answer32)
  In the long form of periodic table, all the non- metals are placed in                        
  A)
   s-block                 done clear
  B)
   p-block              done clear
  C)
   d-block            done clear
  D)
          \[f\]-block             done clear
  View Solution play_arrow

• question_answer33)
  Which of the following is bad conductor of electricity?
  A)
   \[HF\]                                    done clear
  B)
   \[HCl\] done clear
  C)
   \[HBr\]                done clear
  D)
          \[HI\] done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is a drying agent?
  A)
   Cone. \[{{H}_{2}}S{{O}_{4}}\]                    done clear
  B)
   \[{{P}_{2}}{{O}_{5}}\] done clear
  C)
   Silica gel         done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer35)
  Which of the following compounds is known as phosgene?
  A)
   \[P{{H}_{3}}\]                   done clear
  B)
          \[POC{{l}_{3}}\] done clear
  C)
   \[COC{{l}_{2}}\]                 done clear
  D)
          \[C{{S}_{2}}\] done clear
  View Solution play_arrow

• question_answer36)
  Aluminium does not oxidise readily in air because
  A)
   it is high in the electrochemical series done clear
  B)
   it is low in the electrochemical series done clear
  C)
   the metal does not combine with oxygen done clear
  D)
   the metal is covered with a layer of oxide which does not rub off   done clear
  View Solution play_arrow

• question_answer37)
  Aluminium is extracted by
  A)
   heating sodium aluminium silicate to a high temperature done clear
  B)
   treating cryolite with sodium hydroxide solution under pressure done clear
  C)
   heating aluminium oxide with coke in a furnace done clear
  D)
   the electrolysis of molten aluminium oxide in fused cryolite   done clear
  View Solution play_arrow

• question_answer38)
  Which of the following compounds can make clothes fire proof?
  A)
   \[FeS{{O}_{4}}\]              done clear
  B)
          \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\]   done clear
  C)
   \[C{{u}_{2}}S{{O}_{4}}\]                               done clear
  D)
   \[MgS{{O}_{4}}.7{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer39)
  Glass is a :
  A)
   crystalline solid done clear
  B)
   solid having a definite melting point done clear
  C)
   supper cooled liquid   done clear
  D)
   chemical compound done clear
  View Solution play_arrow

• question_answer40)
  The gradual cooling of glass or glass articles is called
  A)
   tempering        done clear
  B)
          annealing   done clear
  C)
   quenching        done clear
  D)
          galvanizing done clear
  View Solution play_arrow

• question_answer41)
  Carborundum is commercial name of
  A)
   \[Ca{{C}_{2}}\]                                 done clear
  B)
   \[C{{O}_{2}}\] done clear
  C)
   \[A{{l}_{2}}{{O}_{3}}\]                  done clear
  D)
          Sic   done clear
  View Solution play_arrow

• question_answer42)
  In which of the following minerals, aluminium is not present?
  A)
   Cryolite               done clear
  B)
   Mica   done clear
  C)
   Feldspar          done clear
  D)
          Fluor spar done clear
  View Solution play_arrow

• question_answer43)
  Which of the following gives black precipitate with \[{{H}_{2}}S\] ?
  A)
   Cupric chloride   done clear
  B)
          Cadmium chloride done clear
  C)
   Zinc chloride     done clear
  D)
          Ferric chloride   done clear
  View Solution play_arrow

• question_answer44)
  Which of the following compounds has phosphorus atom in + 1 oxidation state?
  A)
   \[{{H}_{3}}P{{O}_{3}}\]                 done clear
  B)
   \[{{H}_{3}}P{{O}_{4}}\] done clear
  C)
   \[{{H}_{3}}P{{O}_{2}}\]                                   done clear
  D)
   \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\] done clear
  View Solution play_arrow

• question_answer45)
  Which of the following mixtures is used in the preparation of tips of match sticks?
  A)
  \[\text{S }+\text{ K}\]                                    done clear
  B)
   \[S{{b}_{2}}{{S}_{3}}+S\] done clear
  C)
  \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}+S+P\]   done clear
  D)
          \[P+K\] done clear
  View Solution play_arrow

• question_answer46)
  Which one of the following has the lowest m.p. ?
  A)
   \[\text{B}\]                       done clear
  B)
          \[Al\] done clear
  C)
  \[\text{Ga}\]                       done clear
  D)
          \[Tl\] done clear
  View Solution play_arrow

• question_answer47)
  Aqueous solution of hydrogen sulphide and sulphur dioxide when mixed together yield
  A)
   Sulphur and water   done clear
  B)
   Hydrogen peroxide and sulphur done clear
  C)
   Sulphur trioxide and water done clear
  D)
   Hydrogen and sulphurous acid done clear
  View Solution play_arrow

• question_answer48)
  \[\text{S}{{\text{O}}_{\text{2}}}\]oxidises
  A)
   \[\text{Mg}\]                                     done clear
  B)
   \[{{\text{H}}_{2}}S{{O}_{4}}\] done clear
  C)
   \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]                done clear
  D)
          All of these done clear
  View Solution play_arrow

• question_answer49)
  An acid having a peroxy linkage is
  A)
   puro sulphuric acid done clear
  B)
   care's acid   done clear
  C)
   dithionic acid done clear
  D)
   all of these done clear
  View Solution play_arrow

• question_answer50)
  Iron
  A)
   is the metal is magnetic done clear
  B)
   forms an alloy called steel done clear
  C)
   cast iron is brittle done clear
  D)
   all of these   done clear
  View Solution play_arrow

• question_answer51)
  When sodium hydroxide solution is added to a freshly prepared solution of ferrous sulphate, a green precipitate of ferrous hydroxide is formed which on standing becomes brown because
  A)
   ferric salts are unstable done clear
  B)
   the mixture becomes dirty done clear
  C)
   ferrous hydroxide becomes ferric oxide done clear
  D)
   green ferrous hydroxide oxidises to brown ferric hydroxide   done clear
  View Solution play_arrow

• question_answer52)
  \[{{\text{H}}_{2}}S{{O}_{4}}\] acts as dehydrating agent in its reaction with
  A)
   \[Ba{{(OH)}_{2}}\]          done clear
  B)
          \[NaOH\] done clear
  C)
   \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\]                    done clear
  D)
          All of these done clear
  View Solution play_arrow

• question_answer53)
  Electrolysis of \[{{\text{H}}_{2}}S{{O}_{4}}\] produces at anode
  A)
   \[{{\text{H}}_{2}}\]        done clear
  B)
                          \[{{O}_{2}}\] done clear
  C)
   \[{{\text{H}}_{2}}{{S}_{2}}{{O}_{8}}\]                      done clear
  D)
          \[{{\text{H}}_{2}}{{S}_{2}}{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer54)
  Which of the following gives \[S{{O}_{3}}\] on heating
  A)
   \[{{\text{H}}_{2}}S{{O}_{4}}\]                                   done clear
  B)
   \[CuS{{O}_{4}}+C\] done clear
  C)
   \[FeS{{O}_{4}}\]                done clear
  D)
          \[{{\text{H}}_{2}}S{{O}_{4}}+PC{{l}_{3}}\] done clear
  View Solution play_arrow

• question_answer55)
  Strongest acid among the following is
  A)
   \[{{\text{H}}_{2}}O\]                     done clear
  B)
          \[{{\text{H}}_{2}}S\] done clear
  C)
   \[{{\text{H}}_{2}}Se\]                   done clear
  D)
          \[{{\text{H}}_{2}}Te\]   done clear
  View Solution play_arrow

• question_answer56)
  Which of the following salts would give \[\text{S}{{\text{O}}_{\text{2}}}\]with dil. \[{{\text{H}}_{2}}S{{O}_{4}}\]and also decolourises bromine water?
  A)
   \[N{{a}_{2}}S{{O}_{4}}\]              done clear
  B)
          \[NaHS{{O}_{4}}\] done clear
  C)
   \[N{{a}_{2}}S{{O}_{3}}\]                                done clear
  D)
   \[N{{a}_{2}}S\] done clear
  View Solution play_arrow

• question_answer57)
  Which of the following compounds is known Chile salt petre ?
  A)
   \[KN{{O}_{3}}\]               done clear
  B)
          \[N{{H}_{4}}N{{O}_{3}}\] done clear
  C)
   \[Ca{{(N{{O}_{3}})}_{2}}\]           done clear
  D)
          \[NaN{{O}_{3}}\]   done clear
  View Solution play_arrow

• question_answer58)
  On prolonged exposure to air, sodium finally changes to
  A)
   \[N{{a}_{2}}O\]                                done clear
  B)
   \[N{{a}_{2}}{{O}_{2}}\] done clear
  C)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]                               done clear
  D)
   \[NaOH\] done clear
  View Solution play_arrow

• question_answer59)
  Which of the following chlorides can be extracted with ether?
  A)
   \[NaCl\]              done clear
  B)
          \[KCl\] done clear
  C)
   \[BaC{{l}_{2}}\]                                done clear
  D)
   \[LiCl\]   done clear
  View Solution play_arrow

• question_answer60)
  Molecular formula of glauber's salt is
  A)
   \[MgS{{O}_{4}}.7{{H}_{2}}O\]   done clear
  B)
          \[N{{a}_{2}}C{{O}_{3}}.10{{H}_{2}}O\] done clear
  C)
   \[N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O\]   done clear
  D)
          \[FeS{{O}_{4}}.7{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer61)
  Which of the following absorbs largest volume of hydrogen?
  A)
   colloidal palladium   done clear
  B)
   finely divided nickel done clear
  C)
   colloidal ferric hydroxide done clear
  D)
   finely divided platinum done clear
  View Solution play_arrow

• question_answer62)
  The reducing agent used in the blast furnace to reduce \[F{{e}_{2}}{{O}_{3}}\] to Fe is
  A)
   coke                     done clear
  B)
          carbon done clear
  C)
   lime stone          done clear
  D)
   carbon monoxide   done clear
  View Solution play_arrow

• question_answer63)
  Which of the following is known as soda ash?
  A)
   \[NaOH\]            done clear
  B)
          \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}.{{H}_{2}}O\] done clear
  C)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]           done clear
  D)
         \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{4}}\] done clear
  View Solution play_arrow

• question_answer64)
  Chemical formula of washing soda is
  A)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]                             done clear
  B)
   \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}.10{{H}_{2}}O\]   done clear
  C)
   \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}.5{{H}_{2}}O\]   done clear
  D)
          \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{4}}.10{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer65)
  Which of the following compounds is known as baking soda?
  A)
   Sodium carbonate done clear
  B)
   Calcium carbonate done clear
  C)
   Sodium bicarbona   done clear
  D)
   Calcium bicarbor done clear
  View Solution play_arrow

• question_answer66)
  Sodium burns in dry air finally giving
  A)
   \[\text{N}{{\text{a}}_{\text{2}}}\text{O}\]            done clear
  B)
          \[\text{N}{{\text{a}}_{2}}{{\text{O}}_{2}}\]   done clear
  C)
   \[\text{Na}{{\text{O}}_{2}}\]                    done clear
  D)
          \[\text{N}{{\text{a}}_{3}}N\] done clear
  View Solution play_arrow

• question_answer67)
  Which of the following compounds is known epsom salt?
  A)
   \[CaS{{O}_{4}}.2{{H}_{2}}O\]    done clear
  B)
   \[MgS{{O}_{4}}.7{{H}_{2}}O\]   done clear
  C)
   \[FeS{{O}_{4}}.7{{H}_{2}}O\]    done clear
  D)
          \[M{{g}_{3}}{{(P{{O}_{4}})}_{2}}\] done clear
  View Solution play_arrow

• question_answer68)
  The low boiling metals are purified by
  A)
   Distillation            done clear
  B)
   Poling done clear
  C)
   Liquation         done clear
  D)
          Slag done clear
  View Solution play_arrow

• question_answer69)
  Element present in the stainless steel is
  A)
   Iron                       done clear
  B)
          Chromium done clear
  C)
   Nickel                   done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer70)
  A compound which is called microcosmic salt
  A)
   \[N{{a}_{2}}HP{{O}_{4}}.2{{H}_{2}}O\] done clear
  B)
   \[Na{{H}_{2}}P{{O}_{4}}.{{H}_{2}}O\] done clear
  C)
   \[Na(N{{H}_{4}})HP{{O}_{4}}.4{{H}_{2}}O\]   done clear
  D)
   \[Na(N{{H}_{4}})P{{O}_{4}}.2{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer71)
  Magnesium metal is heated to redness in the presence of nitrogen and on cooling water added. The gas evolved is
  A)
   \[{{N}_{2}}\]                                     done clear
  B)
   \[{{H}_{2}}\] done clear
  C)
   \[N{{H}_{3}}\]                                    done clear
  D)
   \[{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer72)
  Which of the following compounds imparts red colour to the flame and decomposes on heating to give oxygen and a brown gas?
  A)
   \[\text{CaC}{{\text{O}}_{\text{3}}}\]                     done clear
  B)
          \[\text{MgN}{{\text{O}}_{\text{3}}}\] done clear
  C)
  \[\text{MgC}{{\text{O}}_{\text{3}}}\]                    done clear
  D)
          \[\text{Ca }{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{2}}\]   done clear
  View Solution play_arrow

• question_answer73)
  Lithophone, a white pigment, is the mixture of
  A)
   \[BaS{{O}_{4}}\]and \[ZnS\]         done clear
  B)
   \[BaS\,and\,ZnS{{O}_{4}}\] done clear
  C)
   \[CaS{{O}_{4}}\,and\,ZnS{{O}_{4}}\] done clear
  D)
          \[CaS\,and\,ZnS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer74)
  When non-metal reacts with oxygen, they form,   
  A)
   amphoteric oxide           done clear
  B)
   covalent bond   done clear
  C)
   basic oxide       done clear
  D)
          none of these done clear
  View Solution play_arrow

• question_answer75)
  Which of the following is liquid at ordinary temperature?
  A)
   Germanium      done clear
  B)
   Gallium   done clear
  C)
   Gold                     done clear
  D)
          Galena done clear
  View Solution play_arrow

• question_answer76)
  In the Frasch process for the extraction of sulphur, superheated steam is forced down the outermost of the three concentric pipes.
  A)
   wash the sulphur clean done clear
  B)
   remove thenlmpuririties done clear
  C)
   melt the sulphur   done clear
  D)
   dissolve sulphur dioxide done clear
  View Solution play_arrow

• question_answer77)
  Alkali metal ions in aqueous solution, which is The best conductor of electricity is
  A)
   \[L{{i}^{+}}\]                     done clear
  B)
          \[N{{a}^{+}}\] done clear
  C)
   \[{{K}^{+}}\]                      done clear
  D)
          \[C{{s}^{+}}\]   done clear
  View Solution play_arrow

• question_answer78)
  \[K{{O}_{2}}\] is an example of
  A)
    normal oxide      done clear
  B)
   super oxide   done clear
  C)
   sub oxide         done clear
  D)
          peroxide done clear
  View Solution play_arrow

• question_answer79)
  The hydroxide, which is soluble in excess of sodium hydroxide is
  A)
  \[\text{Fe }{{\left( \text{OH} \right)}_{\text{3}}}\]           done clear
  B)
   \[\text{Cu }{{\left( \text{OH} \right)}_{2}}\] done clear
  C)
  \[\text{Cr}{{\left( \text{OH} \right)}_{\text{3}}}\]         done clear
  D)
          \[Al{{\left( \text{OH} \right)}_{\text{3}}}\]   done clear
  View Solution play_arrow

• question_answer80)
  The product of electrolysis of cone. solution of common salt is
  A)
   \[Na+C{{l}_{2}}\]             done clear
  B)
   \[{{H}_{2}}+{{O}_{2}}\] done clear
  C)
   \[NaOH+{{H}_{2}}+C{{l}_{2}}\]   done clear
  D)
   \[Na+C{{l}_{2}}+{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer81)
  Iron obtained from blast furnace is known as
  A)
   pig iron             done clear
  B)
          cast iron done clear
  C)
   wrought iron      done clear
  D)
          steel done clear
  View Solution play_arrow

• question_answer82)
  Metal present in gun metal are
  A)
  \[\text{Cu},\text{ Zn},\text{ Ni}\]        done clear
  B)
          \[\text{Cu},\text{ Sn},\text{ and Zn}\]   done clear
  C)
  \[\text{Cu},\text{ Sn}\]           done clear
  D)
          \[Cu,Al\] done clear
  View Solution play_arrow

• question_answer83)
  Metal which does not form amalgam is
  A)
   Zn                          done clear
  B)
          Ag done clear
  C)
   Cu                                          done clear
  D)
   Fe   done clear
  View Solution play_arrow

• question_answer84)
  Axels are made by heating rods of iron embedded in charcoal powder. This process is known as
  A)
   tempering          done clear
  B)
   annealing done clear
  C)
   case hardening     done clear
  D)
          hardening done clear
  View Solution play_arrow

• question_answer85)
  Nitriding is a process of heating steel in atmosphere of
  A)
  \[\text{N}{{\text{H}}_{\text{3}}}\]                            done clear
  B)
          \[{{\text{N}}_{2}}\] done clear
  C)
   Oxygen          done clear
  D)
          Carbon dioxide done clear
  View Solution play_arrow

• question_answer86)
  \[FeS{{O}_{4}}\].\[7{{H}_{2}}O\] is known as
  A)
   green vitriol         done clear
  B)
          white vitriol done clear
  C)
   blue vitriol        done clear
  D)
          vitriol done clear
  View Solution play_arrow

• question_answer87)
  Rhombic, monoclmic and plastic sulphur are
  A)
   isomers done clear
  B)
   isotopes done clear
  C)
   allotropes   done clear
  D)
   hydrides of sulphur done clear
  View Solution play_arrow

• question_answer88)
  Which one of the following metals is present in german silver?
  A)
   Ni                           done clear
  B)
          Zn done clear
  C)
   Cu                          done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer89)
  Bronze statues mainly contain
  A)
   iron done clear
  B)
   copper and zinc done clear
  C)
   copper and nickel done clear
  D)
   copper and Zn   done clear
  View Solution play_arrow

• question_answer90)
  The percentage of silver in german silver is
  A)
   2.0 %                    done clear
  B)
          10% done clear
  C)
   20 %                      done clear
  D)
          zero   done clear
  View Solution play_arrow

• question_answer91)
  The element which is alloyed with copper to form brass?
  A)
   Pb                          done clear
  B)
          Bi done clear
  C)
   Zn                            done clear
  D)
          Sb done clear
  View Solution play_arrow

• question_answer92)
  When sulphur is heated slowly in a narrow test tube, it melts
  A)
   and then burns done clear
  B)
   to an amber mobile liquid which on further heating, darkens and becomes viscous before becoming mobile again   done clear
  C)
   and then bursts into flame done clear
  D)
   to a pale yellow liquid which solidifies at the end of the test tube done clear
  View Solution play_arrow

• question_answer93)
  Mercury is transported in containers made of
  A)
   \[Ag\]                                  done clear
  B)
   \[Pb\] done clear
  C)
   \[Al\]                    done clear
  D)
          \[Fe\]   done clear
  View Solution play_arrow

• question_answer94)
  Which of the following compounds sublimes on heating?
  A)
   \[HgC{{l}_{2}}\]                                  done clear
  B)
   \[\text{AgN}{{\text{O}}_{\text{3}}}\] done clear
  C)
   \[ZnC{{l}_{2}}\]                done clear
  D)
          \[H{{g}_{2}}C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer95)
  The metal used for making radiation sheild is
  A)
   \[Al\]                    done clear
  B)
          Fe done clear
  C)
   Zn                          done clear
  D)
          Pb   done clear
  View Solution play_arrow

• question_answer96)
  Lead pipes are readily corroded by
  A)
   water                                   done clear
  B)
   acetic acid   done clear
  C)
   cone. \[{{H}_{2}}S{{O}_{4}}\]      done clear
  D)
          dil \[{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer97)
  Which of the following is the lightest metallic element?
  A)
   Mg                        done clear
  B)
          \[Al\] done clear
  C)
   Li                              done clear
  D)
          Mn done clear
  View Solution play_arrow

• question_answer98)
  Which of the following pair of elements form alloy?
  A)
   Zn and Pb           done clear
  B)
   Fe and C done clear
  C)
   Hg and Ag       done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer99)
  Sulphur on reaction with concentrated sulphuric acid forms sulphur dioxide. According to this reaction, sulphuric acid is behaving as
  A)
   drying agent done clear
  B)
   oxidising agent   done clear
  C)
   dehydrating agent done clear
  D)
   none of these done clear
  View Solution play_arrow

• question_answer100)
  Which of the following elements shows allotropy?
  A)
   Mg                                        done clear
  B)
   Cs done clear
  C)
   Sn                            done clear
  D)
          Zn done clear
  View Solution play_arrow

• question_answer101)
  Solder is an alloy of
  A)
   Cu and Zn           done clear
  B)
   Pb and Sb done clear
  C)
   Cu and Ni       done clear
  D)
          Pb and Sn   done clear
  View Solution play_arrow

• question_answer102)
  German silver is an alloy of
  A)
   Cu, Ni and Zn      done clear
  B)
          Cu and Ag done clear
  C)
   Cu and Sn       done clear
  D)
          Cu, Zn, Ag done clear
  View Solution play_arrow

• question_answer103)
  Cinnabar is an ore of
  A)
   Zn                          done clear
  B)
          Sn done clear
  C)
   Pb                          done clear
  D)
          Hg   done clear
  View Solution play_arrow

• question_answer104)
  A compound which gives oxygen on moderate heating is
  A)
   ZnO                       done clear
  B)
          \[A{{l}_{2}}{{O}_{3}}\] done clear
  C)
    \[F{{e}_{2}}{{O}_{3}}\]                done clear
  D)
          \[HgO\]   done clear
  View Solution play_arrow

• question_answer105)
  Ion present in the Nessler's reagent is
  A)
   \[H{{g}^{+}}\]                                   done clear
  B)
   \[H{{g}^{+2}}\] done clear
  C)
   \[{{[Hg{{I}_{4}}]}^{-2}}\]                done clear
  D)
          \[{{[Hg{{(N{{H}_{3}})}_{4}}]}^{+2}}\] done clear
  View Solution play_arrow

• question_answer106)
  The correct formula of washing soda is
  A)
   \[N{{a}_{2}}C{{O}_{3}}\] done clear
  B)
   \[N{{a}_{2}}C{{O}_{3}}.{{H}_{2}}O\] done clear
  C)
   \[N{{a}_{2}}C{{O}_{3}}.9{{H}_{2}}O\] done clear
  D)
   \[N{{a}_{2}}C{{O}_{3}}.10{{H}_{2}}O\]   done clear
  View Solution play_arrow

• question_answer107)
  Aqueous solution of which of the following salts turns the red litmus blue?
  A)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]                             done clear
  B)
   \[\text{NaHC}{{\text{O}}_{\text{3}}}\] done clear
  C)
   \[\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{\text{3}}}.10{{H}_{2}}O\] done clear
  D)
          All of these   done clear
  View Solution play_arrow

• question_answer108)
  If tartaric acid is not added in baking powder  cake will taste bitter due to the presence of
  A)
   sodium hydrogen carbonate done clear
  B)
   carbon dioxide done clear
  C)
   sodium carbonate   done clear
  D)
   all of these done clear
  View Solution play_arrow

• question_answer109)
  Soda-acid fire extinguisher extinguishes the fir
  A)
   cutting the supply of air   done clear
  B)
   removing the combustible substance done clear
  C)
   raising the ignition temperature done clear
  D)
   none of these done clear
  View Solution play_arrow

• question_answer110)
  Which of the following compounds is known as sugar of lead?
  A)
   \[PbS{{O}_{4}}\]                              done clear
  B)
   \[\text{PbC}{{\text{O}}_{3}}\] done clear
  C)
  \[{{(C{{H}_{3}}COO)}_{2}}Pb\]                     done clear
  D)
   \[Pb{{I}_{2}}\] done clear
  View Solution play_arrow

• question_answer111)
  Which of the following is the composition of red lead?
  A)
   PbO                      done clear
  B)
          \[Pb{{O}_{2}}\] done clear
  C)
   \[P{{b}_{3}}{{O}_{4}}\]              done clear
  D)
          \[Pb{{I}_{2}}\] done clear
  View Solution play_arrow

• question_answer112)
  Which of the following is known as white lead (Safeda)?
  A)
   \[\text{PbC}{{\text{O}}_{\text{3}}}\] done clear
  B)
   \[\text{2PbC}{{\text{O}}_{\text{3}}}.Pb{{(OH)}_{2}}\]   done clear
  C)
   \[\text{PbS}{{\text{O}}_{4}}.PbO\] done clear
  D)
   \[\text{PbC}{{\text{O}}_{3}}.Pb{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer113)
  Nitrates of all metals are
  A)
   unstable done clear
  B)
   coloured done clear
  C)
   insoluble in water done clear
  D)
   soluble in water   done clear
  View Solution play_arrow

• question_answer114)
  The simplest formula of bleaching powder is
  A)
   \[Ca(OC{{l}_{2}})\] done clear
  B)
   \[CaOC{{l}_{2}}\]   done clear
  C)
   \[CaOC{{l}_{2}}.{{H}_{2}}O\] done clear
  D)
   \[Ca(OC{{l}_{2}}).2{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer115)
  The substance which, on treating with chlorine, yields bleaching powder is
  A)
   quick lime done clear
  B)
   slaked lime   done clear
  C)
   limestone done clear
  D)
   gypsum done clear
  View Solution play_arrow

• question_answer116)
  Of the following metals, the most reactive Metal is
  A)
   Fe   done clear
  B)
   Ni done clear
  C)
   Pt done clear
  D)
   Au done clear
  View Solution play_arrow

• question_answer117)
  Iron is rendered passive by the treatment with
  A)
   cone. \[HCl\] done clear
  B)
   cone. \[HN{{O}_{3}}\]   done clear
  C)
   cone. \[{{H}_{2}}N{{O}_{4}}\] done clear
  D)
   cone. \[{{H}_{3}}P{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer118)
  Which of the following is a ferrous alloy?
  A)
   Solder done clear
  B)
   Invar   done clear
  C)
   Type metal done clear
  D)
   Magnalium done clear
  View Solution play_arrow

• question_answer119)
  The dead burnt plaster is
  A)
  \[CaS{{O}_{4}}.2{{H}_{2}}O\] done clear
  B)
  \[CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O\] done clear
  C)
   \[CaS{{O}_{4}}\]   done clear
  D)
   \[2CaS{{O}_{4}}.{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer120)
  Which of the following reactions is known as slaking of lime?
  A)
  \[CaS{{O}_{3}}\to CaO+C{{O}_{2}}\] done clear
  B)
  \[CaO+2HCl\to CaC{{l}_{2}}+{{H}_{2}}O\] done clear
  C)
   \[CaC{{O}_{3}}+{{H}_{2}}O\to Ca{{(OH)}_{2}}+C{{O}_{2}}\] done clear
  D)
   \[CaO+{{H}_{2}}O\to Ca{{(OH)}_{2}}\]   done clear
  View Solution play_arrow

• question_answer121)
  High purity copper is obtained by
  A)
   carbon reduction process done clear
  B)
   hydrogen reduction process done clear
  C)
   electrolytic reduction process   done clear
  D)
   thermite process done clear
  View Solution play_arrow

• question_answer122)
  Bleaching powder is soluble in cold water giving a milky solution due to
  A)
   available chlorine done clear
  B)
   lime present in it   done clear
  C)
   calcium carbonate formation done clear
  D)
   the absorption of carbon dioxide from atmosphere done clear
  View Solution play_arrow

• question_answer123)
  In which of the following pair, both the substances are chemically same?
  A)
   milk of lime and lime water   done clear
  B)
   dead burnt plaster and gypsum done clear
  C)
   alumina and gypsum done clear
  D)
   gypsum and Plaster of Paris done clear
  View Solution play_arrow

• question_answer124)
  Raw materials used for the manufacture of Portland cement are
  A)
   gypsum and limestone done clear
  B)
   limestone and clay   done clear
  C)
   alumina, clay and gypsum done clear
  D)
   gypsum and clay done clear
  View Solution play_arrow

• question_answer125)
  \[{{\text{K}}_{\text{4}}}\text{ }[\text{Fe }{{\left( \text{CN} \right)}_{6}}]\]is called
  A)
   potassium hexacyano ferrate (\[\text{(II)}\]   done clear
  B)
   potassium hexacyano ferrate \[\text{(III)}\] done clear
  C)
   potassium fcrricyanide done clear
  D)
   prussian blue done clear
  View Solution play_arrow

• question_answer126)
  Gypsum is added to cement to
  A)
   make the mixture more homogeneous done clear
  B)
   improve the texture of cement done clear
  C)
   make the cement light weight done clear
  D)
  (d ) delay the setting time of cement   done clear
  View Solution play_arrow

• question_answer127)
  Average composition of ordinary glass is
  A)
   \[N{{a}_{2}}O.\,CaO.\,6Si{{O}_{2}}\]   done clear
  B)
  \[N{{a}_{2}}O.\,2CaO.\,3Si{{O}_{2}}\] done clear
  C)
   \[N{{a}_{2}}O.\,CaO.\,6Si{{O}_{2}}.C{{r}_{2}}{{O}_{3}}\] done clear
  D)
   \[N{{a}_{2}}O.\,CaO.PbO.\,6Si{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer128)
  Colour of \[F{{e}^{+2}}\] ion is
  A)
   blue done clear
  B)
   light green   done clear
  C)
   very dark green done clear
  D)
   yellow done clear
  View Solution play_arrow

• question_answer129)
  Number of unpaired electrons in \[F{{e}^{+3}}\] ion is
  A)
   1                                             done clear
  B)
   2 done clear
  C)
   3                                               done clear
  D)
   0 done clear
  View Solution play_arrow

• question_answer130)
  Glass used for making laboratory apparatus is
  A)
   pyrex glass           done clear
  B)
   hard glass done clear
  C)
   soft glass            done clear
  D)
   safety glass done clear
  View Solution play_arrow

• question_answer131)
  The windscreen of cars, aeroplanes etc. is made up of
  A)
   hard glass           done clear
  B)
   safety glass   done clear
  C)
   lead glass            done clear
  D)
   soda glass done clear
  View Solution play_arrow

• question_answer132)
  Which of the substance is present in the photochromatic glass?
  A)
   PbO                                      done clear
  B)
   \[C{{r}_{2}}{{O}_{3}}\] done clear
  C)
   Borax                                   done clear
  D)
   Silver bromide   done clear
  View Solution play_arrow

• question_answer133)
  Steel is mainly an alloy of iron and
  A)
   chromium          done clear
  B)
   nickel done clear
  C)
   manganese       done clear
  D)
          carbon   done clear
  View Solution play_arrow

• question_answer134)
  If steel is heated bright red hot, and is then cooled slowly, the process is called              
  A)
   quenching           done clear
  B)
                   annealing              done clear
  C)
                   tempering done clear
  D)
   smelting                     done clear
  View Solution play_arrow

• question_answer135)
          Which of the following is soluble in ammonia?
  A)
   \[\text{Cr }{{\left( \text{OH} \right)}_{\text{3}}}\] done clear
  B)
   \[Cu{{(OH)}_{2}}\]   done clear
  C)
   \[Fe{{(OH)}_{3}}\] done clear
  D)
  \[Al{{(OH)}_{3}}\]    done clear
  View Solution play_arrow