p-Block elementsMediumBloom L3

Question

An inorganic white crystalline compound (A) has a rock salt structure. (A) on reaction with conc. H2SO4 and MnO2, evolves a pungent smelling, greenish-yellow gas (B). Compound (A) gives white ppt. of (C) with AgNO3 solution. Compounds (A), (B) and (C) will be respectively

Options

A.NaCl, Cl2, Agcl
B.NaBr, Br2, NaBr
C.NaCl, Cl2, Ag2SO4
D.NazCO3, CO2, Ag2CO3

Solution

Sol. Compound A is NaCl which is white crystalline solid having rock salt crystal structure. B is Cl2​ a pungent smelling, greenish - yellow gas. The AgNO3​ reacts with NaCl and a white milky precipitate of AgCl is formed.

2NaCl+2H2​SO4​+MnO2​→Na2​SO4​+MnSO4​+2H2​O+Cl2​

AgNO3​+NaCl→NaNO3​+AgCl

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