JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank

done Chemical stoichiometry Total Questions - 58

• question_answer1)
  How much of NaOH is required to neutralise 1500 \[c{{m}^{3}}\]of 0.1 \[N\,HCl\] (Na = 23)                                              [KCET 2001]
  A)
                  40 g        done clear
  B)
                  4 g done clear
  C)
                  6 g           done clear
  D)
                  60 g done clear
  View Solution play_arrow

• question_answer2)
  How much water should be added to 200 c.c of semi normal solution of \[NaOH\]to make it exactly deci normal [AFMC 1983]
  A)
                  200 cc done clear
  B)
                  400 cc done clear
  C)
                  800 cc     done clear
  D)
                  600 cc done clear
  View Solution play_arrow

• question_answer3)
  2.76 g of silver carbonate on being strongly heated yield a residue weighing                                              [Pb. CET 2003]
  A)
                  2.16 g     done clear
  B)
                  2.48 g done clear
  C)
                  2.64 g     done clear
  D)
                  2.32 g done clear
  View Solution play_arrow

• question_answer4)
  In the reaction, \[4N{{H}_{3}}(g)+5{{O}_{2}}(g)\to 4NO(g)+6{{H}_{2}}O(g)\], When 1 mole of ammonia and 1 mole of \[{{O}_{2}}\]are made to react to completion
  A)
                  1.0 mole of \[{{H}_{2}}O\]is produced            done clear
  B)
                  1.0 mole of \[NO\]will be produced done clear
  C)
                  All the oxygen will be consumed done clear
  D)
                  All the ammonia will be consumed done clear
  View Solution play_arrow

• question_answer5)
  Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (At. wt. of Fe = 56) present in one molecule of haemoglobin is                            [CBSE PMT 1998]
  A)
                  6              done clear
  B)
                  1 done clear
  C)
                  4              done clear
  D)
                  2 done clear
  View Solution play_arrow

• question_answer6)
  What quantity of ammonium sulphate is necessary for the production of \[N{{H}_{3}}\]gas sufficient to neutralize a solution containing 292 g of \[HCl\]? [HCl=36.5; \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]=132; \[N{{H}_{3}}\]=17]                                        [CPMT 1992]
  A)
                  272 g      done clear
  B)
                  403 g      done clear
  C)
                  528 g      done clear
  D)
                  1056 g done clear
  View Solution play_arrow

• question_answer7)
  The percentage of \[{{P}_{2}}{{O}_{5}}\]in diammonium hydrogen phosphate \[{{(N{{H}_{4}})}_{2}}HP{{O}_{4}}\]is                                           [CPMT 1992]
  A)
                  23.48      done clear
  B)
                  46.96 done clear
  C)
                  53.78      done clear
  D)
                  71.00 done clear
  View Solution play_arrow

• question_answer8)
  If \[1\frac{1}{2}\]moles of oxygen combine with Al to form \[A{{l}_{2}}{{O}_{3}}\]the weight of Al used in the reaction is (Al=27)              [EAMCET 1980]
  A)
                  27 g        done clear
  B)
                  54 g done clear
  C)
                  49.5 g     done clear
  D)
                  31 g done clear
  View Solution play_arrow

• question_answer9)
  The percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (atomic weight=78.4). Then minimum molecular weight of peroxidase anhydrous enzyme is [CBSE PMT 2001]
  A)
                  \[1.568\times {{10}^{4}}\]               done clear
  B)
                  \[1.568\times {{10}^{3}}\] done clear
  C)
                  \[15.68\] done clear
  D)
                  \[3.136\times {{10}^{4}}\] done clear
  View Solution play_arrow

• question_answer10)
  \[{{H}_{2}}\] evolved at STP on complete reaction of 27 g of Aluminium with excess of aqueous \[NaOH\] would be [CPMT 1991]
  A)
                  22.4        done clear
  B)
                  44.8 done clear
  C)
                  67.2        done clear
  D)
                  33.6 litres done clear
  View Solution play_arrow

• question_answer11)
  What is the % of \[{{H}_{2}}O\]in \[Fe{{(CNS)}_{3}}.3{{H}_{2}}O\]
  A)
                  45           done clear
  B)
                  30 done clear
  C)
                  19           done clear
  D)
                  25 done clear
  View Solution play_arrow

• question_answer12)
  What weight of \[S{{O}_{2}}\]can be made by burning sulphur in 5.0 moles of oxygen
  A)
                  640 grams              done clear
  B)
                  160 grams done clear
  C)
                  80 grams                done clear
  D)
                  320 grams done clear
  View Solution play_arrow

• question_answer13)
  What is the normality of a 1 M solution of \[{{H}_{3}}P{{O}_{4}}\] [AIIMS 1982]
  A)
                  0.5 N      done clear
  B)
                  1.0 N done clear
  C)
                  2.0 N      done clear
  D)
                  3.0 N done clear
  View Solution play_arrow

• question_answer14)
  Normality of 2M sulphuric acid is                       [AIIMS 1992]
  A)
                  2N           done clear
  B)
                  4N           done clear
  C)
                  \[\frac{N}{2}\]       done clear
  D)
                  \[\frac{N}{4}\] done clear
  View Solution play_arrow

• question_answer15)
  How many g of a dibasic acid (Mol. wt. = 200) should be present in 100 ml of its aqueous solution to give decinormal strength                                       [AIIMS 1992]
  A)
                  1 g           done clear
  B)
                  2 g done clear
  C)
                  10 g        done clear
  D)
                  20 g done clear
  View Solution play_arrow

• question_answer16)
  The solution of sulphuric acid contains 80% by weight \[{{H}_{2}}S{{O}_{4}}\]. Specific gravity of this solution is 1.71. Its normality is about                                                 [CBSE 1991]
  A)
                  18.0        done clear
  B)
                  27.9 done clear
  C)
                  1.0          done clear
  D)
                  10.0 done clear
  View Solution play_arrow

• question_answer17)
  Mohr's salt is dissolved in dil. \[{{H}_{2}}S{{O}_{4}}\] instead of distilled water to
  A)
                  Enhance the rate of dissolution done clear
  B)
                  Prevent cationic hydrolysis  done clear
  C)
                  Increase the rate of ionisation              done clear
  D)
                  Increase its reducing strength done clear
  View Solution play_arrow

• question_answer18)
  Acidified potassium permanganate solution is decolourised by                                                     [MNR 1984]
  A)
                  Bleaching powder done clear
  B)
                  White vitriol done clear
  C)
                  Mohr's salt              done clear
  D)
                  Microcosmic salt done clear
  View Solution play_arrow

• question_answer19)
  Approximate atomic weight of an element is 26.89. If its equivalent weight is 8.9, the exact atomic weight of element would be                                         [DPMT 1984]
  A)
                  26.89      done clear
  B)
                  8.9          done clear
  C)
                  17.8        done clear
  D)
                  26.7 done clear
  View Solution play_arrow

• question_answer20)
  Vapour density of a gas is 22. What is its molecular mass [AFMC 2000]
  A)
                  33           done clear
  B)
                  22 done clear
  C)
                  44           done clear
  D)
                  11 done clear
  View Solution play_arrow

• question_answer21)
  Equivalent weight of \[KMn{{O}_{4}}\] acting as an oxidant in acidic medium is       [CPMT 1990; MP PET 1999]
  A)
                  The same as its molecular weight done clear
  B)
                  Half of its molecular weight  done clear
  C)
                  One-third of its molecular weight done clear
  D)
                  One-fifth of its molecular weight done clear
  View Solution play_arrow

• question_answer22)
  0.16 g of dibasic acid required 25 ml of decinormal NaOH solution for complete neutralisation. The molecular weight of the acid will be                                         [CPMT 1989]
  A)
                  32           done clear
  B)
                  64 done clear
  C)
                  128         done clear
  D)
                  256 done clear
  View Solution play_arrow

• question_answer23)
  To neutralise 20 ml of \[M/10\] sodium hydroxide, the volume of \[M/20\] hydrochloric acid required is [Andhra MBBS 1980]
  A)
                  10 ml      done clear
  B)
                  15 ml done clear
  C)
                  20  ml     done clear
  D)
                  40 ml done clear
  View Solution play_arrow

• question_answer24)
  Hydrochloric acid solutions A and B have concentration of 0.5 N and 0.1 N respectively. The volume of solutions A and B required to make 2 litres of 0.2 N hydrochloric are [KCET 1993]
  A)
                  0.5 l of A + 1.5 l of B           done clear
  B)
                  1.5 l of A + 0.5 l of B done clear
  C)
                  1.0 l of A + 1.0 l of B done clear
  D)
                  0.75 l of A + 1.25 l of B done clear
  View Solution play_arrow

• question_answer25)
  5 ml of N HCl, 20 ml of \[N/2\,\,{{H}_{2}}S{{O}_{4}}\] and 30 ml of \[N/3\,\,HN{{O}_{3}}\] are mixed together and volume made to one litre. The normality of the resulting solution is           [MNR 1991]
  A)
                  \[N/5\]     done clear
  B)
                  \[N/10\] done clear
  C)
                  \[N/20\]   done clear
  D)
                  \[N/40\] done clear
  View Solution play_arrow

• question_answer26)
  Under similar conditions of pressure and temperature, 40 ml of slightly moist hydrogen chloride gas is mixed with 20 ml of ammonia gas, the final volume of gas at the same temperature and pressure will be                          [CBSE PMT 1993]
  A)
                  100 ml    done clear
  B)
                  20 ml done clear
  C)
                  40 ml      done clear
  D)
                  60 ml done clear
  View Solution play_arrow

• question_answer27)
  \[KMn{{O}_{4}}\] reacts with oxalic acid according to the equation, \[2MnO_{4}^{-}+5{{C}_{2}}O_{4}^{2-}+16{{H}^{+}}\to 2M{{n}^{2+}}+10C{{O}_{2}}+8{{H}_{2}}O\], here 20 ml of 0.1 M \[KMn{{O}_{4}}\] is equivalent to      [CBSE PMT 1996]
  A)
                  20 ml of 0.5 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\]       done clear
  B)
                  50 ml of 0.1 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] done clear
  C)
                  50 ml of 0.5 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\]       done clear
  D)
                  20 ml of 0.1 M \[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer28)
  In order to prepare one litre normal solution of \[KMn{{O}_{4}}\], how many grams of \[KMn{{O}_{4}}\] are required if the solution is used in acidic medium for oxidation                [MP PET 2002]
  A)
                  158 g      done clear
  B)
                  31.6 g done clear
  C)
                  790 g      done clear
  D)
                  62 g done clear
  View Solution play_arrow

• question_answer29)
  What is the concentration of nitrate ions if equal volumes of 0.1 M \[AgN{{O}_{3}}\] and 0.1 M NaCl are mixed together                 [NCERT 1981; CPMT 1983]
  A)
                  0.1 N      done clear
  B)
                  0.2 M done clear
  C)
                  0.05 M    done clear
  D)
                  0.25 M done clear
  View Solution play_arrow

• question_answer30)
  30 ml of acid solution is neutralized by 15 ml of a 0.2 N base. The strength of acid solution is [CPMT 1986]
  A)
                  0.1 N      done clear
  B)
                  0.15 N done clear
  C)
                  0.3 N      done clear
  D)
                  0.4 N done clear
  View Solution play_arrow

• question_answer31)
  A solution containing \[N{{a}_{2}}C{{O}_{3}}\] and NaOH requires 300 ml of 0.1 N HCl using phenolpthalein as an indicator. Methyl orange is then added to the above titrated solution when a further 25 ml of 0.2 N HCl is required. The amount of NaOH present in solution is \[(NaOH=40,\,N{{a}_{2}}C{{O}_{3}}=106)\] [CPMT 1992]
  A)
                  0.6 g       done clear
  B)
                  1.0 g done clear
  C)
                  1.5 g       done clear
  D)
                  2.0 g done clear
  View Solution play_arrow

• question_answer32)
  In the preceeding question, the amount of \[N{{a}_{2}}C{{O}_{3}}\] present in the solution is                                            [CPMT 1992]
  A)
                  2.650 g   done clear
  B)
                  1.060 g done clear
  C)
                  0.530 g   done clear
  D)
                  0.265 g done clear
  View Solution play_arrow

• question_answer33)
  How many ml of 1 (M) \[{{H}_{2}}S{{O}_{4}}\] is required to neutralise 10 ml of 1 (M) NaOH solution            [MP PET 1998; MNR 1982; MP PMT 1987]
  A)
                  2.5          done clear
  B)
                  5.0 done clear
  C)
                  10.0        done clear
  D)
                  20.0 done clear
  View Solution play_arrow

• question_answer34)
  Which of the following cannot give iodometric titrations [AIIMS 1997]
  A)
                  \[F{{e}^{3+}}\] done clear
  B)
                  \[C{{u}^{2+}}\] done clear
  C)
                  \[P{{b}^{2+}}\] done clear
  D)
                  \[A{{g}^{+}}\] done clear
  View Solution play_arrow

• question_answer35)
  \[KMn{{O}_{4}}\] reacts with ferrous ammonium sulphate according to the equation \[MnO_{4}^{-}+5F{{e}^{2+}}+8{{H}^{+}}\to M{{n}^{2+}}+5F{{e}^{3+}}+4{{H}_{2}}O\], here 10 ml of 0.1 M \[KMn{{O}_{4}}\] is equivalent to      [CPMT 1999]
  A)
                  20 ml of 0.1 M \[FeS{{O}_{4}}\] done clear
  B)
                  30 ml of 0.1 M \[FeS{{O}_{4}}\] done clear
  C)
                  40 ml of 0.1 M \[FeS{{O}_{4}}\] done clear
  D)
                  50 ml of 0.1 M \[FeS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer36)
  \[Ca{{(OH)}_{2}}+{{H}_{3}}P{{O}_{4}}\to CaHP{{O}_{4}}+2{{H}_{2}}O\] the equivalent weight of \[{{H}_{3}}P{{O}_{4}}\] in the above reaction is   [Pb. PMT 2004]
  A)
                  21           done clear
  B)
                  27 done clear
  C)
                  38           done clear
  D)
                  49 done clear
  View Solution play_arrow

• question_answer37)
  The mass of \[BaC{{O}_{3}}\] produced when excess \[C{{O}_{2}}\] is bubbled through a solution of 0.205 mol \[Ba{{(OH)}_{2}}\] is [UPSEAT 2004]
  A)
                  81 g        done clear
  B)
                  40.5 g done clear
  C)
                  20.25 g   done clear
  D)
                  162 g done clear
  View Solution play_arrow

• question_answer38)
  The amount of water that should be added to 500 ml of 0.5 N solution of \[NaOH\]to give a concentration of 10 mg per ml is
  A)
                  100         done clear
  B)
                  200 done clear
  C)
                  250         done clear
  D)
                  500 done clear
  View Solution play_arrow

• question_answer39)
  Number of moles of \[KMn{{O}_{4}}\]required to oxidize one mole of \[Fe({{C}_{2}}{{O}_{4}})\]in acidic medium is                  [Haryana CEE 1996]
  A)
                  0.6 done clear
  B)
                  0.167 done clear
  C)
                  0.2 done clear
  D)
                  0.4 done clear
  View Solution play_arrow

• question_answer40)
  A hydrocarbon contains 86% carbon, 488ml of the hydrocarbon weight 1.68 g at STP. Then the hydrocarbon is an
  A)
                  Alkane    done clear
  B)
                  Alkene done clear
  C)
                  Alkyne    done clear
  D)
                  Arene done clear
  View Solution play_arrow

• question_answer41)
  The ratio of amounts of \[{{H}_{2}}S\]needed to precipitate all the metal ions from 100 ml of 1 M \[AgN{{O}_{3}}\]and 100 ml of 1 M \[CuS{{O}_{4}}\]will be
  A)
                  1:1          done clear
  B)
                  1:2 done clear
  C)
                  2:1          done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer42)
  An electric discharge is passed through a mixture containing 50 c.c. of \[{{O}_{2}}\]and 50 c.c. of \[{{H}_{2}}\]. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be
  A)
                  (i) 25 c.c. (ii) 50 c.c.               done clear
  B)
                  (i) 50 c.c. (ii) 75 c.c. done clear
  C)
                  (i) 25 c.c. (ii) 75 c.c. done clear
  D)
                  (i) 75 c.c. (ii) 75 c.c. done clear
  View Solution play_arrow

• question_answer43)
  100 ml of 0.1 N hypo decolourised iodine by the addition of x g of crystalline copper sulphate to excess of KI. The value of ?x? is (molecular wt. of \[CuS{{O}_{4}}.5{{H}_{2}}O\]is 250)
  A)
                  5.0 g       done clear
  B)
                  1.25 g done clear
  C)
                  2.5 g       done clear
  D)
                  4 g done clear
  View Solution play_arrow

• question_answer44)
  How many grams of caustic potash required to completely neutralise 12.6 gm \[HN{{O}_{3}}\]
  A)
                  22.4 KOH              done clear
  B)
                  1.01 KOH done clear
  C)
                  6.02 KOH              done clear
  D)
                  11.2 KOH done clear
  View Solution play_arrow

• question_answer45)
  If isobutane and n-butane are present in a gas, then how much oxygen should be required for complete combustion of 5 kg of this gas
  A)
                  17.9 kg   done clear
  B)
                  9 kg done clear
  C)
                  27 kg      done clear
  D)
                  1.8 kg done clear
  View Solution play_arrow

• question_answer46)
  16.8 litre gas containing \[{{H}_{2}}\] and \[{{O}_{2}}\]is formed at NTP on electrolysis of water. What should be the weight of electrolysed water
  A)
                  5 g           done clear
  B)
                  9 g done clear
  C)
                  10 g        done clear
  D)
                  12 g done clear
  View Solution play_arrow

• question_answer47)
  On electrical decomposition of 150 ml dry and pure \[{{O}_{2}}\], 10% of \[{{O}_{2}}\]gets changed to O, then the volume of gaseous mixture after reaction and volume of remaining gas left after passing in turpentine oil will be
  A)
                  145 ml    done clear
  B)
                  149 ml done clear
  C)
                  128 ml    done clear
  D)
                  125 ml done clear
  View Solution play_arrow

• question_answer48)
  What should be the weight of 50% HCl which reacts with 100 g of limestone
  A)
                  50% pure               done clear
  B)
                  25% pure done clear
  C)
                  10% pure               done clear
  D)
                  8% pure done clear
  View Solution play_arrow

• question_answer49)
  What should be the weight and moles of \[AgCl\]precipitate obtained on adding 500ml of 0.20 M \[HCl\]in 30 g of \[AgN{{O}_{3}}\]solution? (\[AgN{{O}_{3}}\]= 170)
  A)
                  14.35 g   done clear
  B)
                  15 g done clear
  C)
                  18 g        done clear
  D)
                  19 g done clear
  View Solution play_arrow

• question_answer50)
  A solution of 10 ml \[\frac{M}{10}FeS{{O}_{4}}\]was titrated with \[KMn{{O}_{4}}\]solution in acidic medium. The amount of \[KMn{{O}_{4}}\]used will be                                           [CPMT 1984]
  A)
                  5 ml of 0.1 M         done clear
  B)
                  10 ml of 1.1 M done clear
  C)
                  10 ml of 0.5 M       done clear
  D)
                  10 ml of 0.02 M done clear
  View Solution play_arrow

• question_answer51)
  1.12 ml of a gas is produced at STP by the action of 4.12 mg of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is                                      [Roorkee 1992; IIT 1993]
  A)
                  16.0        done clear
  B)
                  41.2 done clear
  C)
                  82.4        done clear
  D)
                  156.0 done clear
  View Solution play_arrow

• question_answer52)
  The simplest formula of a compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is                                      [Roorkee 1994]
  A)
                  \[XY\]      done clear
  B)
                  \[{{X}_{2}}Y\] done clear
  C)
                  \[X{{Y}_{3}}\]      done clear
  D)
                  \[{{X}_{2}}{{Y}_{3}}\] done clear
  View Solution play_arrow

• question_answer53)
  A compound contains atoms of three elements in A, B and C. If the oxidation number of A is +2, B is +5 and that of C is ? 2, the possible formula of the  compound is [CBSE PMT 2000]
  A)
                  \[{{A}_{3}}{{(B{{C}_{4}})}_{2}}\] done clear
  B)
                  \[{{A}_{3}}{{({{B}_{4}}C)}_{2}}\] done clear
  C)
                  \[AB{{C}_{2}}\] done clear
  D)
                  \[{{A}_{2}}{{(B{{C}_{3}})}_{2}}\] done clear
  View Solution play_arrow

• question_answer54)
  What will be the volume of \[C{{O}_{2}}\]at NTP obtained on heating 10 grams of (90% pure) limestone           [Pb. CET 2001]
  A)
                  22.4 litre done clear
  B)
                  2.016 litre done clear
  C)
                  2.24 litre done clear
  D)
                  20.16 litre done clear
  View Solution play_arrow

• question_answer55)
  The ratio of the molar amounts of \[{{H}_{2}}S\] needed to precipitate the metal ions from \[20mL\] each of \[1M\ Cd{{(N{{O}_{3}})}_{2}}\] and \[0.5M\ CuS{{O}_{4}}\] is          [CPMT 1997]
  A)
                  1 : 1 done clear
  B)
                  2 : 1 done clear
  C)
                  1 : 2 done clear
  D)
                  Indefinite done clear
  View Solution play_arrow

• question_answer56)
  \[12g\] of \[Mg\](at. mass 24) will react completely with acid to give                                               [MNR 1985]
  A)
                  One mole of \[{{H}_{2}}\] done clear
  B)
                  1/2 mole of \[{{H}_{2}}\] done clear
  C)
                  2/3 mole of \[{{O}_{2}}\] done clear
  D)
                  Both 1/2 mol of \[{{H}_{2}}\] and 1/2 mol of \[{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer57)
  \[1.5\] mol of \[{{O}_{2}}\] combine with \[Mg\] to form oxide \[MgO\]. The mass of \[Mg\] (at. mass 24) that has combined is [KCET 2001]
  A)
                  \[72\ g\]   done clear
  B)
                  \[36\ g\] done clear
  C)
                  \[48\ g\]   done clear
  D)
                  \[24\ g\] done clear
  View Solution play_arrow

• question_answer58)
  100 g CaCO3 reacts with 1litre 1 N HCl. On completion of reaction how much weight of \[C{{O}_{2}}\] will be obtain [Kerala CET 2005]
  A)
                  \[5.5\ g\]  done clear
  B)
                  \[11\ g\] done clear
  C)
                  \[22\ g\]   done clear
  D)
                  \[33\ g\] done clear
  E)
                  \[44\ g\] done clear
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