Free Printable CEEC

1.

1.An electric current can produce

a)

heating effect only.

b)

chemical effect only.

c)

magnetic effect only.

d)

chemical, heating, and magnetic effects.

2.

When an electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

a)

the chemical effect of current.

b)

the heating effect of current.

c)

the magnetic effect of current.

d)

the lightning effect of current.

3.

Which one of the following solutions will not conduct electricity?

a)

lemon juice

b)

vinegar

c)

tap water

d)

vegetable oil

4.

Small amount of a mineral salt present naturally in water makes it a______________ of electricity.

a)

insulator

b)

conductor

c)

both a and b

d)

none of these

5.

Flow of electron is called

a)

Electroplating

b)

Electric current

c)

Electrodes

d)

Electrolyte

6.

conductors can allow electricity because of the presence of

a)

free ions

b)

free electrons

c)

free protons

d)

atoms

7.

Adding common salt to distilled water makes it

a)

Good Conductor

b)

Poor Conductor

c)

No change

d)

Both A and B

8.

Sugar solution is a good conductor of electricity.

a)

True

b)

False

9.

Boojho’s uncle has set up an electroplating factory near his village.

He should dispose off the waste of the factory

a)

in the nearby river.

b)

in the corn field

c)

according to the disposal guidelines of the local authority.

d)

in the nearby pond

10.

Which of the following liquid is not a good conductor of electricity?

a)

Orange juice

b)

Tap water

c)

Vinegar

d)

Honey

11.

When current is passed through a mixture of water and lemon juice, bubbles rise from one of the electrodes. The bubbles are rising from the solution because

a)

of the heating effect of current

b)

of the chemical effect of current

c)

current produces magnetic field around the electrodes

d)

current always produces air bubbles when passed through a liquid

12.

When electric current passes through a conducting solution, it causes _______ _______

a)

chemical reactions

b)

light effect

c)

magnetic effect

d)

nucleus reaction

13.

Who discovered chemical effect of elecric current?

a)

Thomas Edison

b)

Joule-Lenz

c)

Michael Faraday

d)

James Watt

14.

Adding common salt to distilled water makes it

a)

Good Conductor

b)

Poor Conductor

c)

No change

d)

Both A and B

15.

An object through which electrons can easily flow is called a(n) ___________.

a)

Conductor

b)

Insulator

16.

To have a complete electric circuit, the path must be _____

a)

small

b)

closed

c)

big

d)

open

17.

Turning off an electric light creates a(n) _____ path

a)

open

b)

divided

c)

continuous

d)

broken

18.

When a current flows into a wire, such as a wire that connects a battery to a light, the wire stays electrically _____

a)

unbalanced

b)

charged

c)

neutral

d)

uncharged

19.

Batteries and power plants are examples of ______________.

a)

energy sources

b)

energy conduction

c)

energy transformation

20.

______________ are materials such as rubber that do not allow charges to flow.

a)

conductors

b)

circuits

c)

insulators

d)

amps

21.

A complete, unbroken path that charges can flow through is called an __________________.

a)

conductor

b)

electric circuit

c)

electric current

d)

insulator

22.

All electrical devices contain electric ________________.

a)

acid

b)

gears

c)

circuits

d)

motors

23.

Metals such as copper and aluminum are good ______________.

a)

insulators

b)

conductors

c)

circuits

d)

charges

24.

The path of current in a circuit is always completed by _________________.

a)

a transformer

b)

an electrical device

c)

conducting wires

25.

__________________ is the continuous flow of electric charges through a material.

a)

Electric current

b)

Resistance

c)

Voltage

d)

Static Discharge

26.

Substances through which electric charges flow easily are called

a)

Wire

b)

Metal

c)

Conductors

d)

Insulators

27.

Substances through which electric charges cannot move freely-

a)

Insulators

b)

Conductors

c)

Wood

d)

Plastic

28.

A circuit made of wires, a lamp, a switch, and a cell is shown at the right. What change is needed for the lamp to glow?

a)

The switch needs to be opened.

b)

The switch needs to be closed.

c)

The cell needs an insulator.

d)

The wire needs to be connected to the bottom of the cell.

29.

What are electrons in electric circuit

a)

charge carriers

b)

flowing particles which form electric current

c)

misconception

d)

electric current pushers

30.

Electrical current will pass easily through metals such as copper, aluminum and gold. These metals are good

a)

things

b)

insulators

c)

charged particles

d)

conductors

31.

Substances that conduct electricity are called (a) .

32.

Substances that do not conduct electricity are called (a) .

33.

A cation has (a) charge.

34.

Some liquids are (a) conductors of electricity and some are poor conductors of electricity.

35.

Distilled water is an (a) .

36.

Distilled water when mixed with salts becomes a (a) conductor of electricity.

37.

Light emitting diodes (LED) glow even when a (a) electric current flows through it.

38.

The passage of an electric current through a conducting solution causes (a) .

39.

Change in colour is an example of the (a) effect of current.

40.

There are (a) wires attached to an LED.

41.

In an LED, the longer lead is attached to the (a) terminal of the battery and the shorter lead to the negative terminal.

42.

Distilled water is made by removing all (a) .

43.

Most liquids that conducts electricity are solutions of acids, bases and salts.

a)

True

b)

False

44.

All liquids conduct electricity.

a)

True

b)

False

45.

When electric current is passed through the copper sulphate solution, copper and sulphate ions are dissociated.

a)

True

b)

False

46.

Which of the following is a good conductor?

a)

Brick

b)

Steel

c)

Plastic

d)

Cotton

47.

Polythene is

a)

a conductor

b)

an insulator

c)

semi conductor

d)

none of these

48.

Which of the following does not conduct electricity?

a)

Sugar solution

b)

Vinegar solution

c)

Lemon juice solution

d)

Caustic soda solution

49.

Which of the following is a bad conductor of electricity?

a)

Distilled water

b)

Silver nitrate

c)

Sulphuric acid

d)

Copper sulphate

50.

Copper is

a)

a good conductor

b)

an insulator

c)

a semi conductor

d)

none of these

51.

In the given figure, electrolyte, anode and cathode respectively are

a)

A, B and C

b)

B, A and C

c)

B, C and A

d)

A, C and B

e)

C, B and A

52.

The diagram shows a beaker containing a solution of zinc sulphate and two carbon electrodes. A battery is placed next to it. In order that the electrode P be plated with zinc

a)

P must be connected to S and Q to R

b)

P must be connected to Q and S to R

c)

P must be connected to R and Q to S

d)

P and Q must be connected to R

53.

Which of the following pair(s) is/are incorrect?

(i) Silver----------- Good conductor

(ii) Gold ---------- Poor conductor

(iii) Diamond ------- Good conductor

(iv) Glass ----------------- Poor conductor

(v) steel ------------ Good conductor

a)

i & ii only

b)

ii & iv only

c)

ii & iii only

d)

i, ii, iii & v only

e)

i ,ii, iii, iv & v

54.

An electric current is passed through

a conducting solution. Following are the some observations:

(i) Deposits of metal may be seen on electrodes

(ii) Solution may get heated

(iii) Bubbles of gas may be formed on the electrodes

a)

Only (ii) is true.

b)

Only (i) and (ii) are true.

c)

Only (i) and (iii) are true.

d)

All (i), (ii) and (iii) are true.

55.

The bumpers and door handles of motor cars, taps etc. are coated with silvery layer of chromium because

(i) It does not easily get corroded.

(ii) It forms a hard layer which does not easily get scratched.

(iii) It tarnishes quickly.

(iv) It is cheap.

Which of the following options is correctly identifies true (T) or false (F)?

a)

(i) F (ii) F (iii) T (IV) T

b)

(i) T (ii) T (iii) F (IV) F

c)

(i) F (ii) T (iii) F (IV) T

d)

(i) T (ii) T (iii) F (IV) T

56.

Match the two columns and select the correct option from the codes given below.

Column I Column II

1. CFLs P. Electric circuit

2. Closed path Q. Contain toxic mercury

3. Solution of distilled water and salt R. conducts current

a)

1- Q, 2- P, 3- R

b)

1- R, 2- Q, 3- P

c)

1- P, 2- R, 3- Q

d)

1- P, 2- Q, 3- R

57.

Electroplating is widely used in industry for coating metal objects with a thin layer of a deferent metal. This may be done to

(i) make objects appear shiny.

(ii) prevent corrosion.

(iii) make objects resistant to scratches.

(iv) coat more reactive metal on less reactive metals to protect from getting spoilt.

(v) electroplate less expensive metals with silver and gold to make ornaments.

Which of the above statement(s) is/are correct?

a)

i & ii only

b)

ii,& iii only

c)

i & iv only

d)

i, ii, iii & v only

e)

i ,iv & v Only

58.

Read the given statements and select the correct option.

Statement 1: Oil or alcohol does not conduct electricity.

Statement 2: Conduction of liquids depends on the ability of liquids to form ions.

a)

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

b)

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

c)

Statement 1 is true but statement 2 is false.

d)

Statement 1 is false but statement 2 is true.

e)

Both statements 1 and 2 are false.

59.

Assertion: Metals like copper and aluminium are poor conductors of electricity..

Reason: The materials which allow electric current to pass through are called good conductors of electricity

a)

If both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

If both assertion and reason are true but reason is not the correct explanation of the assertion.

c)

If assertion is true but reason is false.

d)

If the assertion and reason both are false.

e)

If assertion is false but reason is true.

60.

A circuit made of wires, a lamp, a switch, and a cell is shown in Fig. What change is needed for the lamp to glow?

a)

The switch needs to be opened.

b)

The switch needs to be closed.

c)

The cell needs an insulator.

d)

The wire needs to be connected to the bottom of the cell.

61.

Assertion: An LED is more efficient device than a bulb.

Reason: LED is more efficient because it can glow even when a weak or less current flows through it.

a)

If both assertion and reason are true and the reason is the correct explanation of the assertion.

b)

If both assertion and reason are true but reason is not the correct explanation of the assertion.

c)

If assertion is true but reason is false.

d)

If the assertion and reason both are false.

e)

If assertion is false but reason is true.

62.

Which of the following statements are correct?

(i) A conductor is any substance or material that prevents the flow of electricity through it.

(ii) An insulator is any substance or material that prevents the flow of electricity through it.

(iii) An insulator is any material or substance that allows electricity to flow through it.

(iv) A conductor is any material or substance that allows electricity to flow through it.

a)

i & ii only

b)

ii & iii only

c)

iii & iv only

d)

ii & iv only

e)

i & iii Only

63.

Which of the following statements are correct?

(i) Distilled water is a bad conductor of electricity because of the absence of dissolved salts and minerals.

(ii) Most liquids that conduct electricity are solutions of acids, bases or salts.

(iii) The more is the number of ions in a liquid the better conductor it is of electricity.

(iv) Conduction of liquids is not dependent on the ability of liquids to form ions.

a)

i & ii only

b)

ii & iii only

c)

iii & iv only

d)

ii & iv only

e)

i ,ii & iii Only

64.

Which of the following statements are correct?

(i) Electroplating is based on magnetic effect of electricity.

(ii) Small amount of some mineral salts are naturally present in water.

(iii) Distilled water when mixed with salt conducts electricity.

(iv) Jewellery makers electroplate silver and gold on expensive metals.

a)

i & ii only

b)

ii & iii only

c)

iii & iv only

d)

ii & iv only

e)

i ,ii & iii Only

65.

Which of the following does not conduct electricity?

(i) Sugar solution

(ii) Vinegar solution

(iii) Lemon juice solution

(iv) Caustic soda solution

(v) milk

a)

i & ii only

b)

iii & iv only

c)

i, iii & v only

d)

i, ii, iii & v only

e)

i ,ii, iii, iv & v

66.

Which of the following statements are NOT correct?

(i) Rubber is a good conductor of electricity.

(ii) Plastics are poor conductor of electricity.

(iii) All liquids conduct electricity.

(iv) Distilled water is free of salt.

(v) Pure water conducts electricity.

a)

i & ii only

b)

iii & iv only

c)

i, iii & v only

d)

i, ii, iii & v only

e)

i ,ii, iii, iv & v

67.

Match the items given in column I suitably with those given in column II.

Column I Column II

P. Closed path (i) Good conductor

Q. LED (ii) Positively charged ion

R. Distilled water (iii) Electric circuit

S. Salt solution (iv) Poor conductor of electricity

T. Cation (v) Negatively charged ion (vi) Light emitting diodes

a)

P- (iii) , Q -(vi) ,R -(i) ,S -(iv) , T- (v)

b)

P- (iii) , Q -(vi) ,R -(i) ,S -(iv) , T- (ii)

c)

P- (iii) , Q -(vi) ,R -(iv) ,S - (i) , T - (ii)

d)

P- (iv) , Q - (iii) ,R - (v) ,S - (vi) , T - (i)

e)

P- (ii) , Q - (v) ,R - (iii) ,S - (iv) , T- (ii)

68.

Which of the following pair(s) is/are incorrect?

(i) Distilled water --------- poor conductor

(ii) Tap water -------------- good conductor

(iii) Honey ------------------ good conductor

(iv) Mercury --------------- poor conductor

(v) Fuels -------------------- poor conductor

a)

i & ii only

b)

iii & iv only

c)

ii, iii & v only

d)

i, ii, iii & v only

e)

i ,ii & v only

69.

Which of the following are the characteristics of an electrolyte?

a)

It has a positive charge.

b)

It has a negative charge.

c)

It conducts charge without dissociating.

d)

It forms positive and negative ions.

70.

What are insulators?

a)

Materials that conduct electricity

b)

Materials that do not conduct electricity

c)

Materials that conduct electricity only at low temperatures

d)

Materials that conduct electricity at room temperature.

CEEC

Total questions: 70

Worksheet time: 23mins

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