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  4. Assertion 2,2-dimethyl propanal give Cannizaro reaction with concentrated NaOH. Reason Cannizaro is a disproportionation reaction.

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Q. Assertion $2,2$-dimethyl propanal give Cannizaro reaction with concentrated $NaOH$.
Reason Cannizaro is a disproportionation reaction.

AIIMSAIIMS 2010

Solution:

$2,2$-dimethyl propanal $\left[\left( CH _{3}\right) C \left( CH _{3}\right)_{2} CHO \right]$ has no $\alpha- H$ atom, thus, readily undergoes Cannizaro reaction, as
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The reactions in which same compound undergoes oxidation and reduction, are called disproportionation reactions. Hence, Cannizaro reaction is a disproportionation reaction.