Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively?

Carbon dioxide and hydrogen

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Hydrogen and carbon dioxide

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Oxygen and carbon dioxide

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Carbon dioxide and oxygen

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Solution

The correct option is C Hydrogen and carbon dioxide
In test tube X:
we have,

$Z n + 2 H C l \to Z n C l_{2} (a q) + H_{2} (g)$

So, hydrogen gas will evolve,

In test-tube Y:
we have, vinegar = acetic acid and baking soda = sodium bicarbonate

$C H_{3} C O O H + N a H C O_{3} \to C H_{3} C O O N a (a q) + C O_{2} (g) + H_{2} O (l)$

So, carbon dioxide gas will evolve.

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Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively?

The correct option is C Hydrogen and carbon dioxideIn test tube X:we have,Zn+2HCl→ZnCl2(aq)+H2(g)So, hydrogen gas will evolve,In test-tube Y:we have, vinegar = acetic acid and baking soda = sodium bicarbonateCH3COOH+NaHCO3→CH3COONa(aq)+CO2(g)+H2O(l)So, carbon dioxide gas will evolve.