JEE Questions for Chemistry Analytical Chemistry Quiz 4 - MCQExams.com

Which of the following cannot give iodometric titration?
  • Fe3+
  • Cu2+
  • Pb2+
  • Ag+
The only cations present in a slightly acidic solution are Fe3+, Zn2+ and Cu2+. The reagent that when added in excess to this solution would identify and separate Fe3+ in one step is
  • 2 M HCl
  • 6 M NH3
  • 6 M NaOH
  • H2S gas
K2[HgI4] detects the ion/group
  • NH2
  • NO

  • Chemistry-Analytical Chemistry-949.png
  • Cl–
Which of the following does not react with AgCl ?
  • Na2CO
  • NaNO3
  • NH4OH
  • Na2S2O3
Which one of the following does not produce metallic sulphide with H2S?
  • ZnCl2
  • CdCl2
  • COCl2
  • CuCl2
Which of the following statement is correct ?
  • Fe2+ gives brown colour with ammonium thiocyanate
  • Fe2+ gives blue precipitate with potassium ferricyanide
  • Fe3+ gives brown colour with potassium ferricyanide
  • Fe3+ gives red colour with potassium ferrocyanide
Which one of the following ionic species will impart colour to an aqueous solution ?
  • Ti4+
  • Cu+
  • Zn2+
  • Cr3+
When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temprerature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner.A, B, C and D respectively are
  • Na ,H2, NaOH, Zn
  • K, H2, KOH, Al
  • Ca, H2 , Ca (OH)2, Sn
  • CaC2, C2H2, Ca (OH)2, Fe
A one litre flask is full of brown bormine vapours. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some
  • Pieces of marble
  • Animal charcoal powder
  • Carbon tetrachloride
  • Carbon disulphide
When I2 is passed through KCl, KF, KBr
  • Cl2 and Br2 are evolved
  • Cl2 is evolved
  • Cl2, F2 and Br2 are evolved
  • None of these
The Ks.p for HgS, Ag2S and PbS are 10-31, 10-45 and 10-50 respectively. The solubilities are in the order
  • HgS > Ag2S > PbS
  • HgS < PbS < Ag2S
  • PbS > Ag2S > HgS
  • Ag2S > HgS > PbS
In the separation of Cu2+ and Cd2+ in 2nd group qualitative analysis of cations, tetramine copper (II) sulphate and tetramine cadmium (II) sulphate react with KCN to form the corresponding cyano complexes. Which one of the following pairs of the complexes and their relative stability enalbles the separation of Cu2+ and Cd2+?
  • K3 [Cu (CN)4] more stable and K2[Cd(CN)4] less stable
  • K2[Cu(CN)4] less stable and K2[Cd(CN)4] more stable
  • K2[Cu(CN)4] more stable and K2[Cd(CN)4] less stable
  • K3[Cu(CN)4] less stable and K2[Cd(CN)4] more stable
A metal X on heating in nitrogen gas gives Y. Y on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a blue colour. Y is
  • Mg(NO3)2
  • Mg3N2
  • NH3
  • MgO
Which of the following gives blood red colour with KCNS ?
  • Cu2+
  • Fe3+
  • Al3+
  • Zn2+
Mercurous ion is represented as

  • Chemistry-Analytical Chemistry-953.png
  • 2)
    Chemistry-Analytical Chemistry-954.png

  • Chemistry-Analytical Chemistry-955.png

  • Chemistry-Analytical Chemistry-956.png

  • Chemistry-Analytical Chemistry-957.png
The metal ion which is precipitated when H2S is passed with HCl
  • Zn2+
  • Ni2+
  • Cd2+
  • Mn2+
Which of the following metal sulphides has maximum solubility in water ?

  • Chemistry-Analytical Chemistry-959.png
  • 2)
    Chemistry-Analytical Chemistry-960.png

  • Chemistry-Analytical Chemistry-961.png

  • Chemistry-Analytical Chemistry-962.png
The phenomenon in which white transparent crystal changes into white powder is called
  • Deliquescence
  • Efflorescence
  • Allotropy
  • Sublimation
A gas “X” is passed through water to form a saturated solution. The aqueous solution on treatment with the AgNO3 gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas “Y” Identify ‘X’ and ‘Y’.
  • X = CO2, Y = Cl2
  • X = Cl2, Y = CO2
  • X = Cl2,Y = H2
  • X = H2 ,Y = Cl2
An aqueous solution of a substance gives a white precipitate on treatment with dil. HCl which dissolves on heating. When H2S is passed through the hot acidic solution, a black precipitate is obtained. The substance is a

  • Chemistry-Analytical Chemistry-964.png
  • 2)
    Chemistry-Analytical Chemistry-965.png

  • Chemistry-Analytical Chemistry-966.png

  • Chemistry-Analytical Chemistry-967.png
Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium
  • CuS > ZnS > Na2S
  • ZnS > Na2S > CuS
  • Na2S > CuS > ZnS
  • Na2S > ZnS > CuS
In borax bead test which compound is formed ?
  • Orthoborate
  • Metaborate
  • Double oxide
  • Tetraborate

Chemistry-Analytical Chemistry-970.png

  • Chemistry-Analytical Chemistry-971.png
  • 2)
    Chemistry-Analytical Chemistry-972.png

  • Chemistry-Analytical Chemistry-973.png

  • Chemistry-Analytical Chemistry-974.png

Chemistry-Analytical Chemistry-976.png
  • HgS
  • HgS + Hg2S
  • HgS + Hg
  • HgS
How do we differentiate between Fe3+ and Cr3+ in group III ?
  • By adding excess of NH4OH solution
  • 2)
    Chemistry-Analytical Chemistry-978.png
  • By decreasing OH- ion concentration
  • Both (and (3)
Which one of the following statement is correct ?
  • From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl
  • Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution

  • Chemistry-Analytical Chemistry-980.png
  • Manganese salts give a violet borax bead test in the reducing flame

Chemistry-Analytical Chemistry-981.png

  • Chemistry-Analytical Chemistry-982.png
  • 2)
    Chemistry-Analytical Chemistry-983.png

  • Chemistry-Analytical Chemistry-984.png

  • Chemistry-Analytical Chemistry-985.png
In a solution containing Cu2+and Cd2+, dil H2 SO4 is added followed by iron fillings. The solution is warmed and NH4 OH is added to reduce the acidity followed by passing of H2S gas. The ppt. obtained will be
  • Cu metal
  • CdS
  • Both Cu metal and CdS
  • None of these
The complex compounds formed when KCN solution is added to a solution containing both Cu2+ and Cd2+ ions are
  • K2[Cu(CN)4], K[Cd(CN)4]
  • K3[Cu(CN)4], K[Cd(CN)4]
  • K3[Cu(CN)4], K[Cd(CN)4]
  • K2[Cu(CN)4], K[Cd(CN)4]
If phosphate is present as an interfering radical in a mixture but III, IV, V groups and Mg2+ are absent, then

  • Chemistry-Analytical Chemistry-987.png
  • 2)
    Chemistry-Analytical Chemistry-988.png

  • Chemistry-Analytical Chemistry-989.png

  • Chemistry-Analytical Chemistry-990.png
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