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Standard XII

Chemistry

Uses of Calcium Carbonate

1 mole of a s...

Question

1 mole of a substance ( $X$ ) was treated with an excess of water, 2 moles of readily combustible gas were produced along with solution which when reacted with $C O_{2}$ gas produced a white turbidity. The substance ( $X$ ) could be:

C a

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C a H_{2}

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C a (O H)_{2}

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C a (N O_{3})_{2}

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Solution

The correct option is B $C a H_{2}$
Reaction of process:
$C a H_{2} + 2 H_{2} O \to C a (O H)_{2} + 2 H_{2} C O_{2} - - \to C a (H C O_{3})_{2}$

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1 mole of a substance (X) was treated with an excess of water, 2 moles of readily combustible gas were produced along with solution which when reacted with CO2 gas produced a white turbidity. The substance (X) could be:

The correct option is B CaH2Reaction of process:CaH2+2H2O→Ca(OH)2+2H2CO2−−→Ca(HCO3)2

1 mole of a substance ( $X$ ) was treated with an excess of water, 2 moles of readily combustible gas were produced along with solution which when reacted with $C O_{2}$ gas produced a white turbidity. The substance ( $X$ ) could be:

The correct option is B $C a H_{2}$
Reaction of process:
$C a H_{2} + 2 H_{2} O \to C a (O H)_{2} + 2 H_{2} C O_{2} - - \to C a (H C O_{3})_{2}$