Test: 35 Year JEE Previous Year Questions: Analytical Chemistry


5 Questions MCQ Test Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper | Test: 35 Year JEE Previous Year Questions: Analytical Chemistry


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Attempt Test: 35 Year JEE Previous Year Questions: Analytical Chemistry | 5 questions in 10 minutes | Mock test for JEE preparation | Free important questions MCQ to study Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper for JEE Exam | Download free PDF with solutions
QUESTION: 1

When H2S is passed through Hg2S we get [2002]

Solution:

When H2S is passed through Hg2S we get a mixture of mercurous sulphide and mercury (Hg2S + Hg) .

QUESTION: 2

How do we differentiate between Fe3+ and Cr3+ in group III?

Solution:

When we add NH4Cl, it suppresses the ionisation of NH4OH and prevents the precipitation of higher group hydroxide in gp(III).
NOTE : Further ferric chloride and chromium chloride form different colour precipitates with NH4OH.

QUESTION: 3

Which one of the following statements is correct ?

Solution:

Between AgCl and AgI, AgI  is less soluble, hence ammonia can dissolve ppt. of AgCl only due to formation of complex as given below: AgCl + 2NH3 → [Ag (NH3)2]Cl

QUESTION: 4

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is [2004]

Solution:

Prussian blue Fe4 [Fe(CN)6 ]3 is formed in lassaigne test for nitrogen.

QUESTION: 5

The equation which is balanced and represents the correct product(s) is: [JEE M 2014] 

Solution:

The complex [CoCl(NH3)5]+ decomposes under acidic medium, so

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