What is the name of NaH2PO4 (hydrogen- prefixes for acid salts, anion derived from phosphate PO4^3-)?

JEE Main levelSingle correct optionDifficulty 2 of 3bn076

What is the name of $NaH X_{2} PO X_{4}$ (hydrogen- prefixes for acid salts, anion derived from phosphate $PO X_{4} X^{3 -}$ )?

The anion is

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

: phosphate carrying two H, so dihydrogenphosphate. One

Na X^{+}

balances the single negative charge. Sodium hydrogenphosphate would be written

Na X_{2} HPO X_{4}

(

HPO X_{4} X^{2 -}