Question

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky.
The solution contains
(a) NaCl (b) HCl (c) LiCl (d) KCl

NCERT Class 10th Science Chapter 2 Acids Bases and Salts

Answer 1

Answer:

HCl is reacts with "crushed eggshells" to yeild a gas that turns "lime-water milky"

Option (b).

Explanation:

As we know that eggshells have calcium carbonate $(CaCO_3)$ in it. When $CaCO_3$ reacts with HCl, the reaction produces "Calcium chloride" $(CaCl_2),$ Carbon dioxide$(CO_2)$ and water $(H_2 O).$

$Ca C o_{3}+2 H C l \rightarrow C a C l_{2}+C o_{2}+H_{2} O$

$\mathrm{Ca}(\mathrm{OH})_{2} \mathrm{CO}_{2} \rightarrow \mathrm{CaCo}_{3}+\mathrm{H}_{2} \mathrm{O}$

when calcium hydroxide is treated with carbondioxide the lime water turns milky.

$CO_2$ is the gas that will turn the lime water $(Ca(OH)_2)$ milky because it will form the calcium carbonate, which is a white precipitate.

Answer 2

Answer:

Explanation

( B ) HCL