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Double Displacement Reaction

Reactin of Na...

Question

Reactin of NaCI with conc. $H_{2} S O_{4}$ liberates a gas X that turns moist blue litmus paper red. When gas X is passed into a test tube containing egg shell powder suspended in water another gas; Y is generated which when passed through time water makes it milky. The gases X and Y respectively, are

HCI and

C O_{2}

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C I_{2}

and

C O_{2}

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S O_{2}

and

C O_{2}

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S O_{2}

and HCI

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Solution

The correct option is A HCI and $C O_{2}$
$2 N a C l + H_{2} S O_{4} \to N a_{2} s O_{4} + 2 H C l (g)$
(X)
$2 H C l + C a C O_{3} \to C a C l_{2} + H_{2} O + C O_{2}$
(X) (Y)
$C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O$
lime water (Y) Milky
suspension

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When X gas is passed through lime water, it turns milky. The milkiness is caused due to the formation of Y. Identify X and Y from the following.

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