• # question_answer Which of the following is an acid? A) $P{{(OH)}_{3}}$                 B) $NaOH$         C)   $N{{H}_{4}}OH$    D)   $Ca{{(OH)}_{2}}$

Correct Answer: A

Solution :

$P{{(OH)}_{3}}\to {{H}_{3}}P{{O}_{3}}$ Hence, the correct option is (a).

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