Test: MCQs (One or More Correct Option): Analytical Chemistry | JEE Advanced


5 Questions MCQ Test Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper | Test: MCQs (One or More Correct Option): Analytical Chemistry | JEE Advanced


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*Multiple options can be correct
QUESTION: 1

The reagents, NH4Cl and aqueous NH3 will precipitate

Solution:

Al3+ (third group radical) an d Ca2+ (fifth group radical) precipitate out as their hydroxide with NH4Cl and aq. NH3 (NH4OH) which are the group reagents.

*Multiple options can be correct
QUESTION: 2

Which of the following statement(s) is (are) correct when a mixture of NaCl and K2Cr2O7 is gently warmed with conc.H2SO4? (1998 - 2 Marks)

Solution:

The reactions are

*Multiple options can be correct
QUESTION: 3

Which of the following statement(s) is (are) correct with reference to the ferrous and ferric ions? (1998 - 2 Marks)

Solution:

The blue precipitate of Fe2+ ions with potassium ferricyanide is due to formation of Turnbull’s blue

The red colouration of Fe3+ ions with potassium thiocyanate is due to the formation of [Fe(CNS)3]

*Multiple options can be correct
QUESTION: 4

The pair(s) of ions where BOTH the ions are precipitated upon passing H2S gas in presence of dilute HCl, is(are) (JEE Adv. 2015)

Solution:

Only group II cations precipitate as sulphide with H2S in acidic medium that is (Cu2+, Pb2+) and (Hg2+, Bi3+)

*Multiple options can be correct
QUESTION: 5

The reagent(s) that can selectively precipitate S2– from a mixture of S2– and SO42– in aqueous solution is(are) (JEE Adv. 2016)

Solution: