MCQs On Water Or Hydride Of Oxygen
1. Water is oxidised to oxygen by
(a) H2O2
(b) KMnO4
(c) ClO2
(d) fluorine
Answer:::: (d)
2. The H-O-H bond angle in a water molecule is about
(a) 90o
(b) 105o
(c) 135o
(d) 180o
Answer:::: (b)
3. The action of water or dilute mineral acids on metals can give
(a) tritium
(b) dihydrogen
(c) trihydrogen
(d) mono hydrogen
Answer:::: (b)
4. Reaction of potassium with water is
(a) hydrolysis
(b) absorption
(c) exothermic
(d) Endothermic
Answer:::: (c)
5. Water softening by Clarke’s process uses
(a) potash alum
(b) calcium bicarbonate
(c) calcium hydroxide
(d) sodium bicarbonate
Answer:::: (c)
6. 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
Answer:::: (d)
7. Oxygen does not react with
(a) Na
(b) P
(c) Cl
(d) S
Answer:::: (c)
8. The gas O3 (ozone) cannot oxidise
(a) KI
(b) FeSo4
(c) KMnO4
(d) K2MnO4
Answer:::: (c)
9. The molarity of pure water at 277K is
(a) 1M
(b) 5M
(c) 55.5M
(d) 2.5M
Answer:::: (c)
10. Which one of the following substances has the highest proton affinity?
(a) NH3
(b) H2O
(c) PH3
(d) H2S
Answer:::: (a)
