Qualitative Analysis - Result Question 15
####15. A gas $X$ is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas $Y$. Identify $X$ and $Y$.
(2002, 3M)
(a) $X=CO _2, Y=Cl _2$
(b) $X=Cl _2, Y=CO _2$
(c) $X=Cl _2, Y=H _2$
(d) $X=H _2, Y=Cl _2$
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Answer:
Correct Answer: 15. (c)
Solution:
- $\underset{X}{Cl _2}+H _2 O \longrightarrow HCl+HOCl$
$HCl+AgNO _3 \longrightarrow AgCl \downarrow$ (white) $+HNO _3$
$2 HCl+Mg \longrightarrow MgCl _2+H _2(g) \uparrow$
