MCQs on Hydrogen

MCQs on Hydrogen

1. Electrolysis of brine produces

1. chlorine gas
2. hydrogen gas
3. sodium hydroxide
4. all the above

Answer: (d)

2. A reactant containing the element that is oxidised is called

1. reducing agent
2. oxidising agent
3. hydrogen
4. sublime

Answer: (a)

3. By losing one or two electrons the atoms of metal are

1. oxidised
2. reduced
3. hydrogenated
4. sublimated

Answer: (a)

4. Electrolytes conduct electricity in

1. solid state
2. liquid state
3. gaseous state
4. plasma state

Answer: (b)

5. Loss of hydrogen atoms by an element is called

1. hydrogenation
2. oxidation
3. reduction
4. sublimation

Answer: (b)

6. The electrolyte among the following is

1. NaOH
2. Urea
3. glucose
4. benzene

Answer: (a)

7. O-O-H bond angle in H2O2 is

1. 97°
2. 106°
3. 120°
4. 109°28′

Answer: (a)

8. Which of the following is very high for proton?

1. radius
2. ionization potential
3. charge
4. hydration energy

Answer: (d)

9. The list which contains only elements is

1. air, water, oxygen
2. hydrogen, oxygen, brass
3. air, water, fire, earth
4. calcium, sulphur, carbon

Answer: (d)

10. The smallest part of an element that cannot exist as a free state is

1. ion
2. charge
3. atom
4. molecule

Answer: (c)