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During the manufacture of poly urethane foam (PUF) ___ gas imparts spongy nature to the foam

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$H_{2}$

$C O_{2}$

$S O_{2}$

answer is C.

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Detailed Solution

During manufacture of PUF, a little water is mixed with the diol. Some of di isocyanate reacts with water to give carbonic acid which spontaneously loses $C O_{2}$ to give an aromatic diamine.

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