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JEE Main levelSingle correct optionDifficulty 2 of 3bn190

Which is the formula of sodium dihydrogenphosphate?

A $NaH X_{2} PO X_{4}$
B $Na X_{3} PO X_{4}$
C $Na X_{2} HPO X_{4}$
D $NaH X_{2} PO X_{3}$

Answer: A

Dihydrogenphosphate is

H X_{2} PO X_{4} X^{-}

, so one

Na X^{+}

balances it:

NaH X_{2} PO X_{4}

.

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