MCQs on Water or Hydride of Oxygen

MCQs on Water or Hydride of Oxygen

1. Water is oxidised to oxygen by

1. H₂O₂
2. KMnO₄
3. ClO₂
4. fluorine

Answer: (d)

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

1. 90^o
2. 105^o
3. 135^o
4. 180^o

Answer: (b)

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

1. tritium
2. dihydrogen
3. trihydrogen
4. mono hydrogen

Answer: (b)

4. Reaction of potassium with water is

1. hydrolysis
2. absorption
3. exothermic
4. Endothermic

Answer: (c)

5. Water softening by Clarke’s process uses

1. potash alum
2. calcium bicarbonate
3. calcium hydroxide
4. sodium bicarbonate

Answer: (c)

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

1. soft water
2. heavy water
3. conductivity water
4. hard water

Answer: (d)

7. Oxygen does not react with

1. Na
2. P
3. Cl
4. S

Answer: (c)

8. The gas O₃ (ozone) cannot oxidise

1. KI
2. FeSo₄
3. KMnO₄
4. K₂MnO₄

Answer: (c)

9. The molarity of pure water at 277K is

1. 1M
2. 5M
3. 55.5M
4. 2.5M

Answer: (c)

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

1. NH₃
2. H₂O
3. PH₃
4. H₂S

Answer: (a)