Which of the following is NOT formed when a mixture of methyl bromide and n-propyl bromide is treated with sodium metal in dry ether?

Which element among the following is ferromagnetic?

Which of following enzymes is useful in conversion of glucose to fructose?

Which of the following reagents is used in the reaction shown below?

Benzoyl chloride $$\stackrel{?}{\longrightarrow}$$ Benzaldehyde