Question

a test tube, an acid is added to a substance 'Z'. Due to the chemical reaction between the acid and 'Z', a gas is evolved. When a burning candle is brought near the test tube, the candle extinguishes. Identify the substance 'Z'. ​

Answer 1

Step-by-step explanation:

Z is carbon dioxide because carbon dioxide extinguishes fire

Answer 2

Given:

An acid is added to the substance ‘Z’ and a gas is evolved which extinguishes the candle

To find:

The substance ‘Z’

Explanation:

Carbon dioxide is released during the reaction and it is confirmed by putting off the candle flame. So CO₂ will be one of the product obtained during the reaction

The reaction will be

  $MCO_3+HCl(l)\longrightarrow MCl_2+CO_2(g)+H_2O(l)$

Final answer:

The substance ‘Z’ can be any metal carbonate i.e., BeCO₃, MgCO₃, CaCO₃, SrCO₃, BaCO₃