P Block Elements in Group 15

In Ramsay and Rayleigh’s isolation on noble gases from air, the nitrogen of the air is finally converted into

Options

(a) NaNO₂ only (b) NO and NO₂ (c) NaNO₃ only (d) NaNO₂ and […]

Use of chlorofluoro carbons is not encouraged because

Options

(a) they are harmful to the eyes of people that use it (b) they damage the refrigerators and air conditioners (c) they eat away […]

Aqueous solutions of hydrogen sulphide and sulphur dioxide when mixed together, yield

Options

(a) sulphur trioxide and water (b) hydrogen and sulphurous acid (c) sulphur and water (d) hydrogen peroxide and sulphur

Correct […]

The most efficient agent for the absorption of SO₃ is

Options

(a) 90% of H₂SO₄ (b) 80% of H₂SO₄ (c) 20% of oleum (d) 98% H₂SO₄

Correct Answer:

98% H₂SO₄

Explanation:

No explanation […]

The percentage of nitrogen in urea is

Options

(a) 46 (b) 59 (c) 25 (d) 54

Correct Answer:

46

Explanation:

The percentage of nitrogen in urea is 46% (Most concentrated nitrogenous fertiliser). It […]

P₂O₅ is an anhydride of

Options

(a) H₃PO₄ (b) H₂P₂O₇ (c) H₃PO₃ (d) HPO₃

Correct Answer:

HPO₃

Explanation:

No explanation available. Be the first to write the explanation for this question by […]

In the process of nitration, the electrophile formed is

Options

(a) NO₂⁺ (b) NO₃⁻ (c) NO₂⁻ (d) NO⁺

Correct Answer:

NO₂⁺

Explanation:

No explanation available. Be the first to write the explanation for […]

Perchloric acid is prepared by the action of concentrated sulphuric acid on

Options

(a) sodium chloride (b) barium chloride (c) sodium perchlorate (d) barium chlorate

Correct Answer:

sodium perchlorate

Explanation:

No explanation available. […]