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What weight of HNO3 is needed to convert 62 gm of P4 in H3 PO4 in the reaction ? P4 + HNO3 → H3 PO4 + NO2 + H2O

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What weight of HNO3 is needed to convert 62 gm of P4 in H3 PO4 in the reaction ?

P4 + HNO3 → H3 PO4 + NO2 + H2O

(A) 63 gm 

(B) 630 gm 

(C) 315 gm 

(D) 126 gm

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Correct Answer is: (B) 630 gm 

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