Water Or Hydride Of Oxygen MCQs

Water is the hydride of oxygen and is expected to exhibit a series of graded properties similar to the hydrides of related elements such as sulfur, selenium, and tellurium in the periodic table. Water is both unremarkable and exceptionally unique. In water (H2O), a hydride of oxygen, the highly electronegative oxygen atom attracts the bonding electrons from two hydrogen atoms, leading to hydrogen bonding.

The H-O-H bond angle in a water molecule is about

(a) 90°
(b) 105°
(c) 135°
(d) 180°

A variety of water which contains soluble salts of Ca and Mg is known as

(a) soft water
(b) heavy water
(c) conductivity water
(d) hard water

Water is oxidised to oxygen by

(a) H₂O₂
(b) KMnO₄
(c) ClO₂
(d) fluorine

Which one of the following substances has the highest proton affinity?

(a) NH₃
(b) H₂O
(c) PH₃
(d) H₂S

Reaction of potassium with water is

(a) hydrolysis
(b) absorption
(c) exothermic
(d) endothermic

Oxygen does not react with

(a) Na
(b) P
(c) Cl
(d) S

The action of water or dilute mineral acids on metals can give

(a) tritium
(b) dihydrogen
(c) trihydrogen
(d) mono hydrogen

The molarity of pure water at 277K is

(a) 1M
(b) 5M
(c) 55.5M
(d) 2.5M

The gas O3 (ozone) cannot oxidise

(a) KI
(b) FeSO₄
(c) KMnO₄
(d) K₂MnO₄

Water softening by Clarke’s process uses

(a) potash alum
(b) calcium bicarbonate
(c) calcium hydroxide
(d) sodium bicarbonate