Why the reactions involving covalent substances are slow?

What is the reaction involved in B?

Why are the reactions involving deuteriun slower than those of protium?

Reaction involving syn addition is

Metabolic reaction involves

Which of the following rate laws has an overall order of 0.5 for reaction involving substances x, y and z ?

A redox reaction always involves

Explain why the melting point of a substance gives an indication of the purity of a substance.

The reaction involved in reduction of NAD^(+) is

Why are ethers highly inflammale substances ?