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CBSE Class 10 Science Question 27 of 60

Solved 2022 Term 1 Question Paper CBSE Class 10 Science — Question 3

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Question 27

Study the experimental set-up shown in given figure and choose the correct option from the following:

Study the experimental set-up shown in given figure and choose the correct option from the following. CBSE 2022 Term 1 Science Class 10 Question Paper Solved.
PQChange observed in calcium hydroxide solution
1.K2CO3Cl2 gasNo change
2.KHCO3CO2 gasNo change
3.KHCO3H2 gasTurns milky
4.K2CO3CO2 gasTurns milky
Answer
K2CO3CO2 gasTurns milky

Reason — The reaction between potassium carbonate and HCl gas produces carbon dioxide gas.

K2CO3 + 2HCl (dil.) ⟶ 2KCl + H2O + CO2

Calcium hydroxide reacts with carbon dioxide gas and forms calcium carbonate, which turns the solution milky.

Ca(OH)2 + CO2 ⟶ CaCO3 + H2O