Problem

Among the following statement which one is true? a.

NH_{3}

is less soluble than

PH_{3}

in water b.

NH_{3}

is stronger base and stronger reducing agent than

PH_{3}

NH_{3}

has higher boiling point than

PH_{3}

and has lower melting point than

PH_{3}

PH_{3}

is stronger reducing agent than

NH_{3}

and it has lower critical temperature than

NH_{3}