Question

An ore on treatment with dilute HCl produces Brisk effervescences

Answer 1

calamine ore is the answer
znco3+2hcl--------->zncl2 +co2+h2o

Answer 2

Answer: Ore which contains carbonates in it will produce brisk effervescence on reacting with dilute HCl.

Explanation:

An ore is defined as a naturally occurring solid substance from which a metal or a valuable mineral can be profitably extracted.

Brisk effervescence are produced on the release of carbon dioxide gas.

When metal carbonates reacts with dilute hydrochloric acid, it produces salt and releases carbon dioxide and water.

The equation for the reaction of metal carbonate and acid is given by:

$\text{Metal carbonates}+HCl(dil.)\rightarrow Salt+CO_2+H_2O$

Hence, an ore which contains carbonates in it will produce brisk effervescence on reacting with dilute HCl.