p-Block elementsMediumBloom L3

Question

Which is the compound responsible for the flickering light called will-o-the-wisp, some times seen in the Marsh.

Options

A.PH3
B.P2H4
C.H2S
D.PH3 + H2S

Solution

Sol. PH3​ frequently contains traces of diphosphine (P2​H4​) which causes it to catch fire spontaneously. This is the origin of the flickering light called 'will -o-the-wisp', which is sometimes seen in marshes.

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