Hardening of oils is caused by

1.	Hardening of oils is caused by
A.	\[{{H}_{2}}\]
B.	\[{{N}_{2}}\]
C.	\[{{O}_{2}}\]
D.	\[C{{O}_{2}}\]
Answer» B. \[{{N}_{2}}\]

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Hardening of oils is caused by

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