JEE Main & Advanced Chemistry Analytical Chemistry Question Bank

done Mock Test - Principles Related to Practical Chemistry Total Questions - 25

• question_answer1)
  Nitrates form a brown ring when treated with \[HCl/FeS{{O}_{4}}\] followed by a few drops of cone. \[{{H}_{2}}S{{O}_{4}}\]. This test depends upon
  A)
  the reduction of nitrate to nitric oxide done clear
  B)
  the oxidation of nitric oxide to nitrogen dioxide done clear
  C)
  reduction of ferrous sulphate to iron done clear
  D)
  oxidizing action of sulphuric acid done clear
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• question_answer2)
  In IV group analysis, \[N{{H}_{4}}OH\] is added before passing \[{{H}_{2}}S\] gas because
  A)
  The sulphides of IV group are insoluble in \[N{{H}_{4}}OH\] done clear
  B)
  The sulphides of other metals are soluble in is\[N{{H}_{4}}OH\] done clear
  C)
  The concentration of \[{{S}^{2-}}\] ions is increased done clear
  D)
  The sulphides of second group are soluble in \[N{{H}_{4}}Cl\] done clear
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• question_answer3)
  Which one of the following can be used in place of \[N{{H}_{4}}Cl\] for the identification of the third group radicals?
  A)
  \[N{{H}_{4}}N{{O}_{3}}\]       done clear
  B)
  \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] done clear
  C)
  \[{{(N{{H}_{4}})}_{2}}C{{O}_{3}}\]               done clear
  D)
  \[NaCl\] done clear
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• question_answer4)
  Which one of the following metal salts produces a blue coloured bead in cobalt nitrate charcoal cavity test?
  A)
  \[Z{{n}^{2+}}\]          done clear
  B)
  \[M{{g}^{2+}}\] done clear
  C)
  \[S{{n}^{2+}}\]          done clear
  D)
  \[A{{l}^{3+}}\] done clear
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• question_answer5)
  An inorganic salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide. The solution contains
  A)
  Bromide done clear
  B)
  Iodide done clear
  C)
  Phosphate          done clear
  D)
  Chromate done clear
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• question_answer6)
  A salt which gives \[C{{O}_{2}}\] with hot cone. \[{{H}_{2}}S{{O}_{4}}\] and also decolourizes acidified KMn04 on warming is
  A)
  \[CH{{O}_{3}}^{-}\]   done clear
  B)
  \[C{{O}_{3}}^{-}\] done clear
  C)
  Oxalate done clear
  D)
  Acetate done clear
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• question_answer7)
  A dark green bead in the borax bead test (in oxidizing flame) indicates the presence of
  A)
  \[C{{r}^{3+}}\]           done clear
  B)
  \[M{{n}^{2+}}\] done clear
  C)
  \[C{{o}^{2+}}\]          done clear
  D)
  \[N{{i}^{2+}}\] done clear
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• question_answer8)
  Which radicals interfere in the test of basic radicals after group II qualitative analysis?
  A)
  \[P{{O}_{4}}^{3-}\]    done clear
  B)
  \[{{C}_{2}}{{O}_{4}}^{2-}\] done clear
  C)
  \[{{F}^{-}}\]                done clear
  D)
  All of these done clear
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• question_answer9)
  White precipitate of AgCl turns to greyish or black when
  A)
  reacts with \[N{{a}_{3}}As{{O}_{4}}\] done clear
  B)
  exposed to sunlight done clear
  C)
  reacts with \[{{K}_{2}}Cr{{O}_{4}}\] done clear
  D)
  reacts with concentrated HCl done clear
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• question_answer10)
  Which of the following will not give positive chromyi chloride test?
  A)
  Copper chloride,\[CuC{{l}_{2}}\] done clear
  B)
  Mercuric chloride, \[HgC{{l}_{2}}\] done clear
  C)
  Zinc chloride,\[ZnC{{l}_{2}}\] done clear
  D)
  Anilinium chloride, \[{{C}_{6}}{{H}_{5}}N{{H}_{3}}Cl\] done clear
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• question_answer11)
  Heating an ammoniacal solution of \[MgS{{O}_{4}}\] in the presence of \[N{{H}_{4}}Cl\] and \[N{{a}_{2}}HP{{O}_{4}}\] causes the precipitation of
  A)
  \[Mg(HP{{O}_{4}})S\]   done clear
  B)
  \[Mg(N{{H}_{4}})P{{O}_{4}}\] done clear
  C)
  \[MgC{{l}_{2}}\]           done clear
  D)
  \[Mg{{(N{{H}_{4}})}_{4}}{{(P{{O}_{4}})}_{2}}\] done clear
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• question_answer12)
  Fe\[{{(OH)}_{3}}\] can be separated from \[Al{{(OH)}_{3}}\] by addition of
  A)
  Dil. HCl done clear
  B)
  NaCl solution done clear
  C)
  NAOH solution done clear
  D)
  \[N{{H}_{4}}Cl\] and \[N{{H}_{4}}OH\] done clear
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• question_answer13)
  The reagents \[N{{H}_{4}}Cl\] and aqueous \[N{{H}_{3}}\] will precipitate
  A)
  \[C{{a}^{2+}}\] done clear
  B)
  \[A{{l}^{3+}}\] done clear
  C)
  \[M{{g}^{2+}}\]          done clear
  D)
  \[Z{{n}^{2+}}\] done clear
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• question_answer14)
  A solution of metal ion when treated with KI, gives a red precipitate that dissolves in excess of KI to give a colorless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is
  A)
  \[P{{b}^{2+}}\]          done clear
  B)
  \[H{{g}^{2+}}\] done clear
  C)
  \[C{{u}^{2+}}\]          done clear
  D)
  \[C{{o}^{2+}}\] done clear
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• question_answer15)
  Concentrated aqueous sodium hydroxide can separate a mixture of
  A)
  \[A{{l}^{3+}}\]and \[S{{n}^{2+}}\] done clear
  B)
  \[A{{l}^{3+}}\] and \[F{{e}^{2+}}\] done clear
  C)
  \[A{{l}^{3+}}\] and \[Z{{n}^{2+}}\] done clear
  D)
  \[Z{{n}^{2+}}\] and \[P{{b}^{2+}}\] done clear
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• question_answer16)
  A gas "X" is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colorless gas "Y". Identify X and Y.
  A)
  \[X=C{{O}_{2}}\], \[Y=C{{l}_{2}}\] done clear
  B)
  \[X=C{{l}_{2}}\], \[Y=C{{O}_{2}}\] done clear
  C)
  \[X=C{{l}_{2}}\], \[Y={{H}_{2}}\] done clear
  D)
  \[X={{H}_{2}}\], \[Y=C{{l}_{2}}\] done clear
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• question_answer17)
  An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, black precipitate is obtained. The substance is a
  A)
  \[Hg_{2}^{2+}\]salt     done clear
  B)
  \[C{{u}^{2+}}\]salt done clear
  C)
  \[A{{g}^{2+}}\]salt     done clear
  D)
  \[P{{b}^{2+}}\]salt done clear
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• question_answer18)
  A red solid is insoluble in water. However, it becomes soluble if some KI is added to water, heating the red solid in a test tube results in liberation of some violet colored fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
  A)
  \[HgO\]  done clear
  B)
  \[P{{b}_{3}}{{O}_{4}}\] done clear
  C)
  \[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\]            done clear
  D)
  \[Hg{{I}_{2}}\] done clear
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• question_answer19)
  Ammonia forms the complex \[Cu{{(N{{H}_{4}})}_{4}}^{2+}\] with copper ion in alkaline solution, but not in acidic solution. This is because of which of the following?
  A)
  In alkaline solution, insoluble \[Cu{{(OH)}_{2}}\] is precipitated, which is soluble in excess of any alkali done clear
  B)
  \[Cu{{(OH)}_{2}}\] is amphoteric. done clear
  C)
  In an acidic solution, hydration protects \[C{{u}^{2+}}\] ion. done clear
  D)
  In acidic solution, proton coordinates with \[N{{H}_{3}}\] forming \[N{{H}_{4}}^{+}\] is not available. done clear
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• question_answer20)
  A salt of \[NaX\xrightarrow{MgC{{l}_{2}}}\] White ppt. on boiling. Thus, anion X is
  A)
  \[HC{{O}^{-}}_{3}\]   done clear
  B)
  \[N{{O}_{3}}^{-}\] done clear
  C)
  \[C{{O}_{3}}^{2-}\]    done clear
  D)
  \[S{{O}_{4}}^{2-}\] done clear
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• question_answer21)
  An aqueous solution contains\[H{{g}^{2+}}\],\[Hg_{2}^{2+}\],\[P{{b}^{2+}}\] and \[C{{d}^{2+}}\] Out of these, how many ions will produce white precipitate with dilute HCl?.
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• question_answer22)
  How many of the following salts impart characteristic colours to the Bunsen flame? \[NaCl,KCl,CuC{{l}_{2}},BaC{{l}_{2}},CaC{{l}_{2}},SrC{{l}_{2}},ZnC{{l}_{2}},MgC{{l}_{2}},AlC{{l}_{3}}\]
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• question_answer23)
  How many of the following are efflorescent in nature Washing soda, glaubers's salt, epsomite, hypo, white vitriol, green vitriol, blue vitriol, cupric chloride, zinc chloride, sodium hydroxide
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• question_answer24)
  Among the following, the number of sulphides which are not soluble in yellow ammonium sulphide is:\[CuS,B{{i}_{2}}{{S}_{3}},A{{s}_{2}}{{S}_{3}},CdS,Sn{{S}_{2}}\]
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• question_answer25)
  An alcoholic solution of dimethylglyoxime is added to an aqueous solution of nickel(II) chloride. Slow addition of ammonium hydroxide led to the precipitation of a bright-red coloured metal complex. Find out the number of hydrogen bonds present in the structure of the complex.
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