Chemical Effects of Electric Current Worksheet-1

Chemical Effects of Electric Current Worksheet-1

1. Current is the flow of:

(a) Matter          (b) Electrons     (c) Protons        (d) Charge

2. In electrolytic solutions, carrier of charge is:

(a) Proton          (b) Electron      (c) Neutron       (d) ion

3. Insulators:

(a) conduct electricity

(b) do not conduct electricity

(c) conduct electricity only at low temperatures

(d) conduct electricity at room temperature

4. Which of the following is an insulator?

(a) Wood           (b) Iron              (c) Carbon         (d) Silver

5. In a cell, electrons move from:

(a) positive electrode to negative electrode

(b) negative electrode to positive electrode

(c) Both positive electrode to negative electrode and negative electrode to positive electrode

6. When an electron moves from negative electrode to positive electrode:

(a) negative charge moves from negative electrode to positive electrode

(b) positive charge moves from positive electrode to negative electrode

(c) no charge flows from either electrode to other electrode

(d) Both negative charge moves from negative electrode to positive electrode and positive charge moves from positive electrode to negative electrode

7. When the ends of metal wire are not connected to a battery:

(a) electrons move from positive electrode to negative electrode

(b) electrons move from negative electrode to positive electrode

(c) electrons move in random directions

(d) protons move in random direction in such a way that their net movement in a unit volume is zero

8. Which of the following statement/s is/ are true?

(a) During electrolysis, charge flows through electrolyte solution via electrons

(b) The randomly moving electrons in a metal wire will start moving in a particular direction when a potential difference is applied across it

(c) A negatively charged particle has higher electric potential than a positively charged particle

(d) Charge flows only through negative charge carriers like electrons

9. A cell converts:

(a) electrical energy into chemical energy

(b) chemical energy into electrical energy

(c) magnetic energy into electrical energy

(d) electrical energy into mechanical energy

10. 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

Answer Key:

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