Question

which gas is released when dilute HCl reacts with metal bicarbonate how is it recognised

Answer 1

==================
Here's your answer :
==================
☆☆☆☆☆☆☆☆☆☆☆
NaHCO3 + HCl ------> NaCl + CO2+H2O

so, carbon dioxide gas is released which can be identified by the following tests:

1) A hissing sound on evolution of carbon dioxide with brisk effervescence (bubbling) in the test tube.
2. On passing the gas through freshly prepared lime water, it will turn milky because of formation of insoluble calcium carbonate.

Ca(OH)2 + CO2 -------> CaCO3 + H2O

3. If you keep a moist blue litmus paper over the test tube, it will turn red as carbon dioxide is acidic in nature.
☆☆☆☆☆☆☆☆☆☆☆
=============
Hope it helps.
=============
$Mark As Brainliest.$

Answer 2

Here is your answer :-

Let take metal Sodium (Na)

NaHCO3 + HCl ------> NaCl + H2O +CO2

so the gas released in this reaction is carbon dioxide .

carbon dioxide gas is released when dilute HCl reacts with metal bicarbonate .

We can recognized it if we pass it ( CO2) in lime water which is of white colour , carbon dioxide turns lime water milky .

Mark as brainliest ...