Question

Which one of the following substances will be required to identify the gas evolved,
when dil. HCl reacts with solid sodium carbonate.
(a) red litmus solution (b) lime water
(c) blue litmus solution (d) zinc granules

Answer 1

here is ur answer
it is B

Answer 2

(b) lime water

HCl on reaction with sodium carbonate, Na2CO3 evolve CO2 therefore lime water will be used for its detection