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Objective Questions
GS
GS Set-1
Chemistry
Inorganic Chemistry
152

Inorganic Chemistry MCQ with Answers

152) Which of the following statements is incorrect?

Transition metal compounds are coloured due to only d−d transition of e⁻

Spectra of lanthanides are sharp due to f−f transition

Most characteristic oxidation state of lanthanides is +3

Ce⁴⁺ is a strong oxidising agent

Answer is:

Transition metal compounds are coloured due to only d−d transition of e⁻

Explanation:

Some compounds show colour due to charge transfer.

Inorganic Chemistry MCQ with Answers

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153) CuSO₄ can only react with:

KCl

KBr

Answer is:

KI

Explanation:

Due to lower lattice enthalpy of KI.

154) Which of the following compounds is insoluble in NH₄OH?

Cu₂O

AgCl

CuSO₄

HgCl₂

Answer is:

HgCl₂

Explanation:

With HgCl₂, it gives a white precipitate of Hg(NH₂)Cl.

155) Ammonium dichromate on heating gives:

Chromic acid and ammonia

Chromium sesquioxide and nitrogen

Chromium sesquioxide and ammonia

Chromic acid and nitrogen

Answer is:

Chromium sesquioxide and nitrogen

156) A mixture of salts (Na₂SO₃ + K₂Cr₂O₇) in a test tube is treated with dil. H₂SO₄ and resulting gas is passed through lime water. Which of the following observations is correct about this test?

Solution in test tube becomes green and lime water turns milky

Solution in test tube is colourless and lime water turns milky

Solution in test tube becomes green and lime water remains clear

Solution in test tube is colourless and lime water also remains clear

Answer is:

Solution in test tube becomes green and lime water turns milky

Explanation:

Na₂SO₃ with dil. H₂SO₄ produces SO₂ gas which turns K₂Cr₂O₇ green and lime water milky.

Inorganic Chemistry MCQ with Answers

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152) Which of the following statements is incorrect?

Transition metal compounds are coloured due to only d−d transition of e−

Inorganic Chemistry MCQ with Answers

Related Inorganic Chemistry MCQ with Answers

153) CuSO4 can only react with:

KI

154) Which of the following compounds is insoluble in NH4OH?

HgCl2

155) Ammonium dichromate on heating gives:

Chromium sesquioxide and nitrogen

156) A mixture of salts (Na2SO3 + K2Cr2O7) in a test tube is treated with dil. H2SO4 and resulting gas is passed through lime water. Which of the following observations is correct about this test?

Solution in test tube becomes green and lime water turns milky

Inorganic Chemistry MCQ with Answers

Transition metal compounds are coloured due to only d−d transition of e⁻

153) CuSO₄ can only react with:

154) Which of the following compounds is insoluble in NH₄OH?

HgCl₂

156) A mixture of salts (Na₂SO₃ + K₂Cr₂O₇) in a test tube is treated with dil. H₂SO₄ and resulting gas is passed through lime water. Which of the following observations is correct about this test?