JEE Questions for Chemistry Analytical Chemistry Quiz 1 - MCQExams.com

MnO2 and H2SO4 added to NaCl, the greenish-yellow gas liberated is
  • Cl2
  • NH3
  • N2
  • H2
Which of the following doesn't give a ppt. with silver nitrate solution?
  • Ethyl bromide
  • Sodium bromide
  • Calcium chloride
  • Sodium chloride
What colour is imparted into the flame when lithium is burnt?
  • Golden yellow
  • Brick red
  • Crimson red
  • Grassy green
Which of the following radicals gives the apple green flame during flame test ?
  • Ba2+
  • Sr2+
  • Ca2+
  • Cr3+
Borax bead test of Cr (chromium) is
  • green
  • blue
  • violet
  • brown
The yellow precipitate formed during the chromyl chloride test is chemically
  • chromic acid
  • lead chromate
  • lead acetate
  • sodium chromate
The incorrect statement in respect of chromyl chloride test is
  • formation of red vapours
  • formation of lead chromate
  • formation of chromyl chloride
  • liberation of chlorine
In the brown ring test, the brown colour of the ring is due to
  • ferrous nitrate
  • ferric nitrate
  • a mixture of NO and NO2
  • ferrous nitrososulphate
Brown ring is made for

  • Chemistry-Analytical Chemistry-877.png
  • Cl-
  • l-
  • Br-
Silver chloride dissolves in aqueous ammonia due to formation of
  • [Ag(NH3)2]+
  • [Ag(NH3)2]
  • [Ag(NH4)2]+
  • [Ag(NH4)2]
Black precipitates form in many metal ion solutions, then which anion is used as a precipitating agent?
  • Cl-
  • S2-

  • Chemistry-Analytical Chemistry-879.png

  • Chemistry-Analytical Chemistry-880.png
Upon treatment with ammoniacal H2S, the metal ion solutions that precipitates as a sulphide is
  • Fe(III)
  • Al(III)
  • Mg(II)
  • Zn(II)
Which one of the following metallic hydroxides does not dissolve in sodium hydroxide solution?
  • Zn(OH)2
  • Al(OH)3
  • Fe(OH)3
  • Pb(OH)2
Fe(OH)3 can be separated from Al(OH)3 by the addition of
  • NaCl solution
  • dil. HCl solution
  • NaOH solution
  • NH4Cl and NH4OH
The hydroxide insoluble in NH4OH + NH4Cl is
  • Al(OH)3
  • Ca(OH)3
  • Zn(OH)2
  • Mg(OH)2
In Nessler's reagent for the detection of ammonia the active species is
  • Hg2Cl2
  • Mg2+
  • Hg2I2

  • Chemistry-Analytical Chemistry-881.png
When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as
  • Zn
  • Fe
  • Pb
  • Hg

Chemistry-Analytical Chemistry-883.png
  • Hg2Cl2 and PbCl2
  • Hg2Cl2
  • PbCl2 and HgCl2
  • PbCl2
Which of the following sulphides is yellow in colour ?
  • CuS
  • CdS
  • ZnS
  • CoS
The principle involved in the classification of basic radicals, is
  • common ion effect
  • solubility product
  • valency of radicals
  • strength of salt
Fe2+ ion is distinguished from Fe3+ ion by
  • BaCl2
  • KCN
  • NaNO3
  • NH4SCN
In borax bead test, the coloured ions give characteristic coloured beads due to the formation of
  • metal borates
  • metal metaborates
  • metal phosphates
  • metal tetraborates
A white crystalline salt A reacts with dilute HCl to liberate a suffocating gas B and also forms a yellow precipitate. The gas B turns potassium dichromate acidified with dilute H2SO4 to a green coloured solution C. A,B and C are respectively.
  • Na2SO3 , SO2 , Cr2 (SO4 )3
  • Na2S2O3 , SO2 , Cr2 (SO4)3
  • Na2S, SO2 , Cr2 (SO4 )3
  • Na2SO4 , SO2 , Cr2 (SO4 )3
To an aqueous solution containing anions a few drops of acidified KMnO4 are added. Which one of the following anions, if present will not decolourise the KMnO4 solution?
  • I -
  • 2)
    Chemistry-Analytical Chemistry-885.png
  • S2-

  • Chemistry-Analytical Chemistry-886.png
  • Cl -
A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when hot and turns white on cooling. The compound is
  • Pb(NO3)2
  • PbCO3
  • BaCO3
  • ZnCO3
A salt on treatment with dil. HCl gives a pungent smelling gas and a yellow precipitate. The salt gives green flame test and a yellow precipitate with potassium chromate. The salt is
  • NiSO4
  • BaS2O3
  • PbS2O3
  • CuSO4
The brown complex obtained in the detection of nitrate radical is formulated as [Fe(H2O)5 NO]SO4. What is the oxidation number of Fe in this complex?
  • +1
  • +2
  • +3
  • 0
AgCl dissolves in a solution of NH3 but not in water because
  • NH3 is a better solvent than H2O
  • Ag+ forms a complex ion with NH3
  • NH3 is a stronger base than H2O
  • the dipole moment of water is higher than NH3
The brown ring test for nitrates depends on
  • the reduction of nitrate to nitric oxide
  • oxidation of nitric oxide to nitrogen dioxide
  • reduction of ferrous sulphate to iron
  • oxidising action of sulphuric acid

Chemistry-Analytical Chemistry-889.png
  • FeSO4 ∙ NO
  • [Fe(SO4)2 ∙ NO]H2O
  • Fe(SO4)3 ∙ NO
  • None of these
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