PH3 can be obtained by heating

a P 4 + 3 NaOH + 3 H 2 O → 3 NaH 2 PO 2 + PH 3 ↑ b 2 H 3 PO 2 ⟶ Δ 3 H 3 PO 4 + PH 3 c 4 H 3 PO 3 ⟶ Δ 3 H 3 PO 4 + PH 3

Heating phosphorus acid (H 3 PO 3 )

Heating phosphinic acid (H 3 PO 2 )

Heating phospharic acid (H 3 PO 4 )

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PH₃ can be obtained by heating

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Heating phosphorus acid (H₃PO₃)

White phosphorus with hot concentrated alkali

Heating phosphinic acid (H₃PO₂)

Heating phospharic acid (H₃PO₄)

answer is A, B, C.

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Detailed Solution

$\begin{array}{l} (a) P_{4} + 3 NaOH + 3 H_{2} O \to 3 {NaH}_{2} {PO}_{2} + {PH}_{3} ↑ \\ (b) 2 H_{3} {PO}_{2} \overset{Δ}{⟶} 3 H_{3} {PO}_{4} + {PH}_{3} \\ (c) 4 H_{3} {PO}_{3} \overset{Δ}{⟶} 3 H_{3} {PO}_{4} + {PH}_{3} \end{array}$

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