Cut surfaces of fruit and vegetables often become dark because – McqOptions

MCQOPTIONS

1.	Cut surfaces of fruit and vegetables often become dark because [DPMT 1983; CPMT 1983]
A.	Dirty knife makes it dark
B.	Oxidation of tannic acid in the presence of trace of iron from the knife makes it dark
C.	Dust of the air makes it dark
D.	None of the above
Answer» C. Dust of the air makes it dark

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