Chemical Effects of Electric Current Worksheet-2

Chemical Effects of Electric Current Worksheet-2

1. _______ present in the lemon juice acts as an electrolyte.

(a) Sulphuric acid                        (b) Nitric acid

(c) Hydrochloric acid                  (d) Citric acid

2. Anode is:

(a) positively charged electrode

(b) negatively charged electrode

(c) wire used to connect the electrodes

(d) electrolyte which conducts electricity

3. Cathode is:

(a) positively charged electrode

(b) negatively charged electrode

(c) a positively charged ion formed in the electrolyte

(d) a negatively charged ion formed in the electrolyte

4. Copper electrode:

(a) donates electrons to hydrogen ions

(b) accepts electrons from hydrogen ions

(c) donates electrons to sulphate ions

(d) accepts electrons from sulphate ions

5. When copper rod donates electrons to hydrogen ions, it gains ____ charge.

(a) positive charge                       (b) negative charge

(c) no charge

6. The electrolyte in dry cell is:

(a) copper sulphate                      (b) zinc sulphate

(c) sulphuric acid                         (d) ammonium chloride

7. In dry cell, ________ acts as positive terminal.

(a) carbon rod

(b) manganese dioxide

(c) manganese dioxide and powdered carbon

(d) metal cap on the carbon rod

8. The common dry cell produces a voltage of:

(a) 1.5 V             (b) 30 V             (c) 60 V              (d) 3 V

9. When electric current is flown through a conductor, some amount of:

(a) electrical energy is converted into heat energy

(b) electrical energy is converted into mechanical energy

(c) mechanical energy is converted into electrical energy

(d) heat energy is converted into electrical energy

10. Nichrome is an alloy made of:

(a) nickel and chromium

(b) nitrogen and chromium

(c) nitrogen, chlorine and chromium

(d) nickel, chromium and manganese

Answer Key:

(1)-(d); (2)-(a); (3)-(b); (4)-(a); (5)-(a); (6)-(d); (7)-(d); (8)-(a); (9)-(a); (10)-(a)