When rainwater percolates into the cracks of RCC, it further gets weakened due to the:

formation of

H_{2} C O_{3}

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Solution

The correct option is A formation of $H_{2} C O_{3}$
Formation of $H_{2} C O_{3}$ :

RCC contains $C a C O_{3}$ which when reacted with water forms carbonic acid which therefore gets weakened.

$C a C O_{3} + H_{2} O \to C a O + H_{2} C O_{3}$

Hence, the correct option is $(A)$ .

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When rainwater percolates into the cracks of RCC, it further gets weakened due to the:

The correct option is A formation of H2CO3Formation of H2CO3:RCC contains CaCO3 which when reacted with water forms carbonic acid which therefore gets weakened.CaCO3+H2O→CaO+H2CO3Hence, the correct option is (A).

The correct option is A formation of $H_{2} C O_{3}$
Formation of $H_{2} C O_{3}$ :

RCC contains $C a C O_{3}$ which when reacted with water forms carbonic acid which therefore gets weakened.

$C a C O_{3} + H_{2} O \to C a O + H_{2} C O_{3}$

Hence, the correct option is $(A)$ .