Question

Name the gas in each of the following :
i) A gas evolved when dil HCL is added to calcium carbonate.
ii) The gas evolved on reaction of aluminium with boiling concentrated caustic alkali solution.
iii) The gas produced when copper reacts with concentrated nitric acid.
iv) The gas produced on reaction of dilute sulphuric acid with iron sulphide.

Answer 1

(i) Carbon Dioxide
(ii) Hydrogen
(iii) Nitrogen Dioxide
(iv) Hydrogen Sulphide

Answer 2

Hey there
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Question :- 1

→ A gase evolved when dilute HCl is added to calcium carbonate

Answer :- ₃₄₂₅∴

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂ ↑.

Here we can see C0₂ gas is being evolved


Question 2 :-

The gas evolved on reaction of aluminum with boiling concentrated caustic alkali solution

Answer :-

Hydrogen gas is evolved

Question 3 :- The gas released when copper reacts with concentrated mitti acid

Answer :-

Cu + NO₃ → CuO + NO₂↑

Here it can be seen clearly that NO₂ gas is released

Question 4 :- The gas produced on reaction of dilute sulphuric acid with iron sulphide

Answer :-

Hydrogen sulphide gas is evolved

Hope this may help you