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Standard X

Chemistry

Mole Concept

Assertion :Ca...

Question

Assertion :Calomel is a chemical compound whereas brass is a mixture. Reason: Calomel always contains $5.6$ times as much mercury as chlorine by weight. Brass can be made with widely different ratios of copper and zinc.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Calomel is $H g_{2} C l_{2}$ .
Atomic weight of $H g$ and $C l$ are $200.59$ g and $35.5$ g respectively.
Ratio of weights of $H g$ and $C l$ $= \frac{2 \times 200.59}{2 \times 35.5} = 5.6$

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Assertion :Calomel is a chemical compound whereas brass is a mixture. Reason: Calomel always contains 5.6 times as much mercury as chlorine by weight. Brass can be made with widely different ratios of copper and zinc.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionCalomel is Hg2Cl2. Atomic weight of Hg and Cl are 200.59 g and 35.5 g respectively.Ratio of weights of Hg and Cl =2×200.592×35.5=5.6

Assertion :Calomel is a chemical compound whereas brass is a mixture. Reason: Calomel always contains $5.6$ times as much mercury as chlorine by weight. Brass can be made with widely different ratios of copper and zinc.