Chemistry 9 Chapter 7 - Electro Chemistry - 3

Chemistry 9 Chapter 7 - Electro Chemistry - 3

1. Oxidation state of Group-IA elements is?

a) -2
b) +1
c) +2
d) -1

2. Oxidation state of Group-IIA elements is?

a) +1
b) +2
c) -1
d) -2

3. Oxidation state of Group-IIIA elements is?

a) -2

b) +1

c) +3
d) -3

4. Oxidation state of Group-VIIA elements is?

a) +1
b) +3

c) -1
d) +2

5. A device used by police to test a person's breath for alcohol is known as?

a) Stethoscope
b) Breath Thermometer
c) Breath Alyzer

d) Barometer

6. The oxidation state of B in Boric acid is?

a) -2

b) -1
c) +3
d) +2

7. The reactant containing the element that is reduced in a chemicalreaction is known as?

a) None of these
b) Both of these

c) Oxidizing agent

d) Reducing agent

8. The reactant containing the element that is oxidized in chemicalreaction is known as?

a) None of these
b) Both of these

c) Reducing agent

d) Oxidizing agent

9. A reaction that involves transfer of electrons is known as?

a) Sublimation
b) Oxidation reduction reaction
c) Hydrogenation
d) Condensation reaction

10. Which one of the following is used as a reducing agent inreduction of free metals?

a) All of these
b) Hydrogen gas
c) Coke
d) Aluminium

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