87.) Phosphine on decomposition producesphosphorus and hydrogen. When

1.	87.) Phosphine on decomposition producesphosphorus and hydrogen. When 100 ml ofphosphine is decomposed the change involume under laboratory conditions is1) 50 ml increase 2) 50 ml decrease3) 900 ml decrease 4) 75 ml increase
Answer» 4PH3 (g) = P4 (s)+ 6H2 (g) (Elemental phosphorus exists as tetraatomic molecules). When the temperature and pressure remain the same, 4 ml of PH3 will give 6 ml of H2. (On applying Gay-Lussac's law ). Hence, 100 ml of PH3 will yield 150 ml of H2. Increase in volume = (150-100) ml = 50 ml. (The volume of solid phosphorus is negligible). There is a 50% increase in volume.

87.) Phosphine on decomposition producesphosphorus and hydrogen. When 100 ml ofphosphine is decomposed the change involume under laboratory conditions is1) 50 ml increase 2) 50 ml decrease3) 900 ml decrease 4) 75 ml increase

Answer»

4PH3 (g) = P4 (s)+ 6H2 (g) (Elemental phosphorus exists as tetraatomic molecules).

When the temperature and pressure remain the same, 4 ml of PH3 will give 6 ml of H2. (On applying Gay-Lussac's law ).

Hence, 100 ml of PH3 will yield 150 ml of H2.

Increase in volume = (150-100) ml = 50 ml. (The volume of solid phosphorus is negligible).

There is a 50% increase in volume.