The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
LiAlH4
KMnO4
MnO
NaBH4
The correct answer is (C) : MnO
Benzoic acid can be converted to benzaldehyde in presence of MnO.
Convert Ethanal to But-2-enal
Write structure of the products of the following reactions: 
Consider an A.P. $a_1,a_2,\ldots,a_n$; $a_1>0$. If $a_2-a_1=-\dfrac{3}{4}$, $a_n=\dfrac{1}{4}a_1$, and \[ \sum_{i=1}^{n} a_i=\frac{525}{2}, \] then $\sum_{i=1}^{17} a_i$ is equal to
