Chemical Effects of Electric Current Worksheet-5

Chemical Effects of Electric Current Worksheet-5

1. Electroplating is based on

(a) Magnetic effect of electricity

(b) Chemical effect of electricity

(c) Heating effect of electricity

(d) Physical effect of electricity

2. An electrolyte

(a) Has positive charge

(b) Has negative charge

(c) Should be able to conduct charge without dissociating

(d) Should be able to form positive and negative ions

3. Cathode is

(a) Electrode connected to positive terminal of battery

(b) Electrode connected to negative terminal of battery

(c) A positively charged ion formed in the electrolyte

(d) A negatively charged ion formed in the electrolyte

4. When copper rod donates electrons to hydrogen ions, it gains _______ charge.

(a) Positive        (b) Negative      (c) No charge    (d) Cannot say

5. An electrolyte is

(a) A metal

(b) A solution

(c) A liquid that conducts current

(d) All of these

6. Splitting a compound using electricity is called

(a) Electrolysis                              (b) Electrolyte

(c) Electrokinesis                         (d) None of these

7. Most common industrial application of chemical effects of electric current is

(a) Electroplating                         (b) Electrolysis

(c) Anodising                                 (d) None of these

8. Tin cans, used for storing food are made by Electroplating

(a) Chrome onto tin                     (b) Chrome onto Iron

(c) Tin onto iron                           (d) None of these

9. Nichrome is an alloy made of

(a) Nickel and chromium

(b) Nitrogen and Chromium

(c) Nitrogen, chlorine and chromium

(d) Nickel, chromium and manganese

10. The chemical reaction due to passage of electric current depends on

(a) Electrodes                                (b) Magnitude of current

(c) Density of liquid                     (d) All of these

Answer Key:

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