JEE Questions for Chemistry Analytical Chemistry Quiz 3 - MCQExams.com

Sometimes yellow turbidity appears while passing H2S gas even in the absence of II group radicals This is because of
  • Sulphur is present in the mixture as impurity
  • IV group radical are precipitated as sulphides
  • The oxidation of H2S gas by some acid radicals
  • III group radicals are precipitated as hydroxides
The ion that cannot be precipitated by both HCl and H2S is
  • Pb2+
  • Cu+
  • Ag+
  • Sn2+
In fifth group,(NH4)2CO3 is added to precipitate out the carbonates. We do not add Na2CO3 because
  • CaCO3 is soluble in Na2CO3
  • Na2CO3 increases the solubility of fifth group carbonates
  • MgCO3 will be precipated out in fifth group
  • None
Which of the following cations is detected by the flame test ?

  • Chemistry-Analytical Chemistry-909.png
  • K+
  • Mg2+
  • Al3+
Which one among the following pairs of ions cannot be separated by H2S in dilute hydrochloric acid ?

  • Chemistry-Analytical Chemistry-910.png
  • 2)
    Chemistry-Analytical Chemistry-911.png

  • Chemistry-Analytical Chemistry-912.png

  • Chemistry-Analytical Chemistry-913.png
In Nessler’s reagent, the active ion is
  • Hg+
  • Hg2+
  • [HgI]2-
  • [HgI4]2-
A metal 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
  • Bromide
  • Iodide
  • Phosphate
  • Chromate
Which of the following form a hydroxide highly soluble in water ?
  • Ni2+
  • K+
  • Zn2+
  • Al3+
A metal salt solution forms a yellow precipitate with potassium chromate in acectic acid, a white precipitate with dilute sulphuric acid,but gives no precipitate with sodium chloride or iodide, it is
  • Lead carbonate
  • Basic lead carbonate
  • Barium carbonate
  • Strontium carbonate
Which of the following combines with Fe(II) ions to form a brown complex
  • N2O
  • NO
  • N2O3
  • N2O4
Nessler’s reagent is used to detect

  • Chemistry-Analytical Chemistry-917.png
  • 2)
    Chemistry-Analytical Chemistry-918.png

  • Chemistry-Analytical Chemistry-919.png

  • Chemistry-Analytical Chemistry-920.png
Prussian blue is formed when
  • Ferrous sulphate reacts with FeCl3
  • Ferric sulphate reacts with K4 [Fe(CN)6]
  • Ferrous ammonium sulphate reacts with FeCl3
  • Ammonium sulphate reacts with FeCl3
What product is formed by mixing the solution of K4[Fe(CN)6 with the solution of FeCl3?
  • Ferro-ferricyanide
  • Ferric-ferrocyanide
  • Ferri-ferricyanide
  • None
Which of the following will not give positive chormyl chloride test ?
  • Copper chloride, CuCl2
  • Mercuric chloride, HgCl2
  • Zinc chloride, ZnCl2
  • Anilinium chloride, C2H5NH3Cl.
A blue colouration is not obtained when
  • Ammonium hydroxide dissolves in copper sulphate
  • Copper sulphate solution reacts with K4[Fe(CN)6]
  • Ferric chloride reacts with sodium ferrocyanide
  • Anhydrous white CuSO4 is dissolved in water
AgCl dissolves in ammonia solution giving

  • Chemistry-Analytical Chemistry-924.png
  • 2)
    Chemistry-Analytical Chemistry-925.png

  • Chemistry-Analytical Chemistry-926.png

  • Chemistry-Analytical Chemistry-927.png
The composition of ‘golden spangles’ is
  • PbCrO4
  • PbI2
  • AS2S3
  • BaCrO4
The aqueous solution of the following salts will be coloured ?
  • Zn (NO3)2
  • LiNO3
  • CrCl3
  • Potash alum
When AgNO3 is strongly heated, the products formed are
  • NO and NO2
  • NO2 and O2
  • NO2 and N2O
  • NO and O2
The reagents, NH4Cl and aqueous NH3 will precipitate
  • Ca2+
  • Al3+
  • Mg2+
  • Zn2+
The ion which is not precipitated by H2S in the presence of HCl is
  • Cu+
  • Ag+
  • Pb2+
  • Al3+
The salt used for performing ‘bead’ test in qualitative inorganic analysis is

  • Chemistry-Analytical Chemistry-930.png
  • 2)
    Chemistry-Analytical Chemistry-931.png

  • Chemistry-Analytical Chemistry-932.png

  • Chemistry-Analytical Chemistry-933.png
In which of the following solvents, AgBr will have the highest solubility ?
  • 10-3 M NaBr
  • 10-3 M NH4OH
  • Pure water
  • 10-3 M HBr
Cu2+ ions will be reduced to Cu+ ions by the addition of a an aqueous solution of
  • KF
  • KCl
  • KI
  • KOH
A substance on treatment with dil.H2SO4 liberates a colourless gas which produces (i) turbidity with baryta water and (ii) turns acidified dichromate solution green. The reaction indicates the presence of

  • Chemistry-Analytical Chemistry-935.png
  • 2)
    Chemistry-Analytical Chemistry-936.png

  • Chemistry-Analytical Chemistry-937.png

  • Chemistry-Analytical Chemistry-938.png
Brown ring test is used to detect
  • Iodide
  • Nitrate
  • Iron
  • Bromide
Which compound does not dissolve in hot dilute HNO3?
  • HgS
  • PbS
  • CuS
  • CdS
An aqueous solution of FeSO4Al2(SO4)3 and chrome alum is heated with excess of Na2O2 and filtered. The materials obtained are
  • A colourless filtrate and a green residue
  • A yellow filtrate and a green residue
  • A yellow filtrate and a brown residue
  • A green filtrate and a brown residue
Which of the following compounds on reaction with NaOH and Na2 O2 gives yellow colour ?
  • Cr(OH)3
  • Zn (OH)2
  • Al (OH)3
  • None of these
CrO3 dissolve in aqueous NaOH to give

  • Chemistry-Analytical Chemistry-943.png
  • 2)
    Chemistry-Analytical Chemistry-944.png

  • Chemistry-Analytical Chemistry-945.png

  • Chemistry-Analytical Chemistry-946.png
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