The product $(C)$ is:

What is the product of Hydroboration-oxidation of but-$1$-ene?

$CH_3-C(CH_3)_2-CH=CH_2 \xrightarrow[H_2O_2/OH^{-}]{B_2H_6/THF} (Z)$ Major product

$CH_3-C(CH_3)(Br)-CH(CH_3)_2 \xrightarrow[\Delta]{EtOH} (A)$
Major product $(A)$ is

Explain the addition of sulphuric acid to alkenes with the help of a reaction.

How many of the following compounds on reductive ozonolysis produce formaldehyde $(HCHO)$ as one of the products? The compounds are: $1$-butene,$2$-butene,$2$-methyl-$1$-butene,cyclopentene,cyclobutene,$1$-methylcyclopropene,methylenecyclopropane,$1$-methylcyclopropene (isomer),and cyclohexene.