List of top Organic Chemistry Questions on Reaction mechanisms asked in GATE CY

The major product formed in the following reaction sequence is:
Step 1: \(\mathrm{C_6H_{13}{-}C{\equiv}CH}\) is treated with catecholborane, then heated.
Step 2: the product from Step 1 is treated with \(\mathrm{Br_2}\), then \(\mathrm{NaOMe}\).
The major product formed in the following reaction is:
The major product formed in the following reaction is

The least acidic among the following compounds: 

is: 
 

The rate of the substitution reaction of \([Co(CN)_5Cl]^3\)\(^-\) with OH\(^-\) to give \([Co(CN)_5(OH)]^3\)\(^-\) follows: