Chemical Effects of Electric Current Worksheet-6

Chemical Effects of Electric Current Worksheet-6

1. Ammonium chloride in dry cell is

(a) A paste                                      (b) In liquid state

(c) In solid state                            (d) In gaseous state

2. Sulphate ions in an electrolyte move towards

(a) Cathode

(b) Anode

(c) Middle of the two electrodes

(d) Each other

3. The full form of LED is

(a) Light Emitting Diode            (b) Layer Emission Diode

(c) Light Emission Diode           (d) None of these

4. Adding common salt to distilled water makes it

(a) Good conductor                      (b) Insulator

(c) Can't say                                   (d) None of these

5. Which of the following are the uses of electroplating?

(a) Make objects appear shiny

(b) Prevent corrosion

(c) Make objects resistant to scratches

(d) All of these

6. Which of the following liquids does not conduct electricity?

(a) Lemon juice                            (b) Sugar solution

(c) Dilute hydrochloric acid       (d) Distilled water

7. To protect iron from corrosion and rust, it is coated with

(a) Tin                (b) Copper         (c) Mercury       (d) Zinc

8. Select the correct statement.

(a) Only solids conduct electricity

(b) Electroplating is mainly used to make the object

(c) Two electrodes have same polarity

(d) Most electrolytes are solutions of acids, bases and salts

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

(a) Sulphuric acid                        (b) Nitric acid

(c) Hydrochloric acid                  (d) Citric acid

10. 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.

Answer Key:

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