The formula of phosphate of a metal, M is MPO₄. The formula of its nitrate will be

• M NO₃

• M (NO₃)₂

• M (NO₃)₃

• M₂(NO₃)₃

The formula of phosphate of a metal, M is M NH₄PO₄. The formula of its sulphate will be

• M SO₄

• M (SO₄)₂

• M₂SO₄

• M₂ (SO₄)₃

83.

With the increase in atomic weights, melting points of the alkali metals

• increase

• decrease

• remain constant

• do not show definite trend

Alkali metals in each period have

• smallest size

• owest ionization potential

• highest ionisation potential

• highest electronegativity

In potassium manganate, the oxidation state of manganese is

• +5

• +6

• +7

• +8

The reactivity of the alkali metal sodium with water, is made use of

• in drying of alcohols

• in drying of benzene

• in drying of organic amines

• as a general drying agent

The bleaching action of the bleaching powder is due to the liberation of

• chlorine

• molecular oxygen

• nascent oxygen

• calcium carbonate

Calcium carbide reacts with water to produce

• methane

• ethane

• ethylene

• acetylene

Heating together of sodium ethoxide and ethyl iodide wll give

• ether

• ethyl alcohol

• acetaldehyde

• acetic acid

TEL is

• a petrol fuel

• anti-knocking compound

• Gasoline

• insecticide