WBJEE 2021 Physics and Chemistry Solved Paper

CHEMISTRY

CATEGORY - I (Q41 to Q70)

Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.

Question : 59 of 80

Marks: +1, -0

The white precipitate (Y), obtained on passing colourless and odourless gas (X) through an ammoniacal solution of NaCl, loses about 37% of its weight on heating and a white residue (Z) of basic nature is left. Identify (X), (Y) and (Z) from following sets.

(X) (Y) (Z)

N2 (NH4)2CO3 NH4Cl
(X) (Y) (Z)

O2 NaNH4CO3 NaHCO3
(X) (Y) (Z)

CO2 NH4HCO3 (NH4)2CO3
(X) (Y) (Z)

CO2 NaHCO3 Na2CO3

(X)	(Y)	(Z)
N2	(NH4)2CO3	NH4Cl

(X)	(Y)	(Z)
O2	NaNH4CO3	NaHCO3

(X)	(Y)	(Z)
CO2	NH4HCO3	(NH4)2CO3

(X)	(Y)	(Z)
CO2	NaHCO3	Na2CO3

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