NCERT Class VIII Science Solutions: Chapter 14-Chemical Effects of Electric Current Part 4

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Question 16:

Observe Fig.

As showing in fig is a two circuits A or B

Two Circuits a or B

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Which of these two circuits A or B shows the correct observation?

Answer:

Diagram A shows the correct observation.

Question 17:

Observe the following circuits carefully. In which circuit will the bulb glow? Write ‘Yes’ or ‘No’ in the blank space provided along each of the circuit given in Fig.

As showing in fig is a bulb is a connected in battery

Bulb is a Connected in Battery

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Answer:

  1. No

  2. Yes

  3. No

  4. Yes

LONG ANSWER QUESTIONS

Question 18:

An electric current is passed through a conducting solution. List any three possible observations.

Answer:

  • Bubbles of gas may be formed on the electrodes.

  • Deposits of metal may be seen on electrodes.

  • Change in the colour of the solution may take place.

  • The solution may get heated. (Any three)