Question

On thermal decomposition of CaCO3, a gas ‘X’ is
obtained. The aqueous solution of X

(1) Turns red litmus blue
(2) Does not change the colour of phenolphthalein
(3) Gives red colour with turmeric
(4) Gives blue colour with methyl orange

Answer 1

1) Turns red litmus to blue

Answer 2

Answer:

(2)The aqueous solution of X Does not change the colour of phenolphthalein

Explanation:

Given that,The thermal decomposition of CaCO3,a gas X is produced.The thermal decomposition reaction of Calcium carbonate is written below.

$CaCO _{3} - - > CaO + CO _{2}$

Therefore,the gas X is Carbon Dioxide(CO2)

The aqueous solution of Carbon dioxide is acidic in nature.

Therefore,it does not change the color of phenolphthalein as it is acidic

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