Question

A solution reacts with crushed egg shell to give a gas that which burns with a "pop sound ".The solution contains
a) Mg(OH)2
b) Na2CO3
c) NaCl
d) HCl​

Answer 1

HCl

Egg-shells contain calcium carbonate. Calcium carbonate reacts with HCl to give out CO2 gas, which turns lime water milky.

Answer 2

Answer:

hcl

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