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

Options

A. If both (A) and (R ) are correct and (R ) is the correct explantion for (A)
B. If both (A) and (R ) are correct but (R ) is not the correct explantion for (A)
C. If (A) is correct but (R ) is incorrect.
D. If (A) and (R ) are incorrect.

Answer

A

Explanation

Calomel is `Hg_(2)Cl_(2)`. (Atomic weight of `Hg` and `Cl` are `= 220.59` and `35.5 g`, respectively)
Ratio of weights of `Hg` and `Cl = (2 xx 200.59)/(2 xx 35.5) = 5.6`