(D) The correct answer is $D$. Water gas is a mixture of $CO$ and $H_2$. It does not contain $CO_2$ as a major component. $SiO_2$ reacts with $HF$ to

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Water gas contains about $40 \%$ of $CO_2$.

(D) The correct answer is $D$. Water gas is a mixture of $CO$ and $H_2$. It does not contain $CO_2$ as a major component. $SiO_2$ reacts with $HF$ to form $SiF_4$ and $H_2O$,making it soluble. $(CH_3)_2SiCl_2$ undergoes hydrolysis followed by condensation to form linear silicones. Zeolites are used for water softening by ion exchange.

Class 11 Chemistry p-Block Elements (Class 11)Carbon family

Easy

Which one of the following statements is not correct?

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A
Hydrolysis of $(CH_3)_2SiCl_2$ gives a product which undergoes condensation polymerisation to form long chain silicones.
B
$SiO_2$ is soluble in $HF$.
C
Hydrated zeolites are used as ion exchangers to reduce the hardness of hard water.
D
Water gas contains about $40 \%$ of $CO_2$.