The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is :

Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding them, is :

Which of the following conditions in drinking water causes methemoglobinemia?

A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable for drinking is :

Water samples with BOD values of 4 ppm and 18 ppm, respectively are :

The major product of the following reaction is :

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives :

Which of the following is not a correct method of the preparation of benzylamine from cyanobenzene ?

The major product of the following reaction is :

Ethylamine (C2H5NH2) can be obtained from N-ethylphatalimide on treatment with :

Hinsberg's reagent is :

The major products A and B for the following reactions are, respectively:

The major product obtained in the following reaction is :

The major product of the following reaction is:

Which of the following amines can be prepared by Gabriel phthalimide reaction ?

Coupling of benzene diazonium chloride with 1 - naphthol in alkaline medium will give :

The increasing order of the reactivity of the following with LiAlH4 is

The major product of the following reaction is –

The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is (A) (B) (C) (D)

A compound 'X' on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamine test. Compound 'X' is :