The number of elements in $Ca {(OH)}_{2}$ is x and that in NaOH is y. Choose the correct option regarding x and y. [1 mark]
A. x = y
B. x < y
C. x > y
D. x = 2y

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Solution

Correct answer: Option C. x > y
Number of elements in $Ca {(OH)}_{2}$ is 5 and that in NaOH is 3. Thus, x = 5 and y = 3. Hence, x > y.

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