The Sblock Elements Ques 43
43. A solid compound ’ $X$ ’ on heating gives $\mathrm{CO}_2$ gas and a residue. The residue mixed with water forms ’ $Y$ ‘. On passing an excess of $\mathrm{CO}_2$ through ’ $Y$ ’ in water, a clear solution ’ $Z$ ’ is obtained. On boiling ’ $Z$, a compound ’ $X$ ’ is reformed. The compound ’ $X$ ’ is
[2004]
(a) $\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2$
(b) $\mathrm{CaCO}_3$
(c) $\mathrm{Na}_2 \mathrm{CO}_3$
(d) $\mathrm{K}_2 \mathrm{CO}_3$
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Answer:
Correct Answer: 43.(b)
Solution: (b)
BETA
