Question Set A

Tamilnadu 10th Standard Science Electricity Important Questions Study Material - QB365

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Questions:

Multiple Choice Question

50 x 1 = 50

Nichrome is used as heating element in electric heater, because it has _____________

(a)

high resistivity.

(b)

high melting point.

(c)

not easily oxidised

(d)

all the above

The persistence of hearing for human ear is

(a)

1 s

(b)

10 s

(c)

0.1 s

(d)

0.01 s

A resistor of 18Ω is connected to a 9 V battery, the current in the circuit is

(a)

5 A

(b)

50 A

(c)

0.5 A

(d)

1 A

The pH of the stomach fluid is approximately _________.

(a)

2.0

(b)

2.1

(c)

2.5

(d)

2.4

At this state, the volume of the liquid and gaseous phases remain constant. Since it is a physical change, the equilibrium attained is called ________ equilibrium.

(a)

physical

(b)

chemical

(c)

mechanical

(d)

none

Removal of Hydrogen is known as ___________

(a)

Dehydration

(b)

Dehydrogenation

(c)

Decarboxylation

(d)

None

Iron gets rusted faster in an acid than __________.

(a)

water

(b)

bases

(c)

solvents

(d)

suspension

Physical changes are called as _________.

(a)

Reversible reaction

(b)

Irreversible reaction

(c)

Periodic

(d)

Non-periodic

Carbon - Carbon contain double bond (or) triple bond are called ________________

(a)

Alkane

(b)

Alkane

(c)

Alkyne

(d)

Alkene and Alkyne

10.

__________ is based on the principle of nuclear fusion.

(a)

Hydrogen Bomb

(b)

Atom bomb

(c)

nuclear reactor

(d)

none

11.

During such a disintegration, the nucleus which undergoes disintegration is called __________.

(a)

parent nucleus

(b)

daughter nucleus

(c)

either a or b

(d)

none

12.

Technetium with atomic number _________.

(a)

(b)

(c)

(d)

13.

________ Waves are produced during earth quake, ocean waves, sound produced by whales etc..

(a)

Audible waves

(b)

infrasonic waves

(c)

Ultrasonic waves

(d)

b and c

14.

__________ waves with a frequency below 20Hz that cannot be heard by the human ear.

(a)

Audible waves

(b)

infrasonic waves

(c)

Ultrasonic waves

(d)

a and c

15.

The ______ required for the flow of charges is provided by the battery.

(a)

Potential difference

(b)

electric potential

(c)

electrical current

(d)

none

16.

___________is used to measure the current.

(a)

Resistor

(b)

Ammeter

(c)

Rheostat

(d)

Galvanometer

17.

Which of the following is formed when soap water acts on clothes to remove dirt or grease?

(a)

acetic acid

(b)

Micelle

(c)

Ethyl alcohol

(d)

all the above

18.

According to IUPAC rules, the secondary suffix used to represent carboxylic acids is _________________.

(a)

(b)

(c)

ate

(d)

oic

19.

Methylene group is

(a)

CH₄

(b)

- CH₃

(c)

- CH₂ -

(d)

- CH -

20.

The value of ionic product of water at 25°C is ____________

(a)

1.00 x 10¹⁴

(b)

1.00 x 10^-14

(c)

1.00 X 10⁴

(d)

1.00 X 10^-4

21.

Gas laws state the relationship between _____ properties of gas.

(a)

pressure

(b)

volume

(c)

Temperature & mass

(d)

all the above

22.

Fundamental laws of gases are

(a)

Boyle's law

(b)

Charles's law

(c)

Avogadro

(d)

all the above

23.

In nuclear reactors, __________ convert fast neutrons into slow neutrons.

(a)

source

(b)

control rods

(c)

moderators

(d)

sink

24.

A chain reaction is continuous due to

(a)

large mass defect

(b)

large energy

(c)

production of more neutrons in fission

(d)

None of these

25.

The pitch of sound depends on

(a)

frequency

(b)

amplitude

(c)

both

(d)

none

26.

At what velocity should a source of sound move towards a listener so that apparent frequency is twice the actual frequency?

(a)

165 m/s

(b)

330 m/s

(c)

660 m/s

(d)

110 m/s

27.

Choose the incorrect statement:

(a)

A switch is the source of electric current in a circuit.

(b)

A switch help to complete or break the circuit.

(c)

A switch help us to use electricity as per requirement

(d)

When the switch is open there is an air gap between its terminals

28.

Kilowatt - hour is the unit of

(a)

Power

(b)

Potential difference

(c)

Force

(d)

Electrical energy

29.

The pH of a solution is 3. Its [OH^–] concentration is

(a)

1 × 10^–3 M

(b)

(c)

1 × 10^–11 M

(d)

11 M

30.

Which of the following is not an “element + element → compound” type reaction?

(a)

C_(s) + O_2(g) → CO_2(g)

(b)

2K_(s) + Br_2(l) → 2KBr_(s)

(c)

2CO_(g) + O_2(g) → 2CO_2(g)

(d)

4Fe_(s) + 3O_2(g) → 2Fe₂O_3(s)

31.

A reaction between carbon and oxygen is represented by C_(s) + O_2(g)→ CO_2(g) + Heat. In which of the type(s), the above reaction can be classified?
(i) Combination Reaction
(ii) Combustion Reaction
(iii) Decomposition Reaction
(iv) Irreversible Reaction

(a)

i and ii

(b)

i and iv

(c)

i, ii and iii

(d)

i, ii and iv

32.

Photolysis is a decomposition reaction caused by __________

(a)

heat

(b)

electricity

(c)

light

(d)

mechanical energy

33.

H_2(g) + Cl_29(g) → 2HCl_(g) is a

(a)

Decomposition Reaction

(b)

Combination Reaction

(c)

Single Displacement Reaction

(d)

Double Displacement Reaction

34.

Which of the following is/are correct?
i. Chain reaction takes place in a nuclear reactor and an atomic bomb.
ii. The chain reaction in a nuclear reactor is controlled
iii. The chain reaction in a nuclear reactor is not controlled
iv. No chain reaction takes place in an atom bomb

(a)

(i) only correct

(b)

(i) & (ii) are correct

(c)

(iv) only correct

(d)

(iii) & (iv) are correct

35.

In which of the following, no change in mass number of the daughter nuclei takes place
i) \(\alpha\) decay
ii) \(\beta\) decay
iii) \(\gamma \) decay
iv) neutron decay

(a)

(i) is correct

(b)

(ii) and (iii) are correct

(c)

(i) & ( iv) are correct

(d)

(ii) & (iv) are correct

36.

Man-made radioactivity is also known as ___________.

(a)

Induced radioactivity

(b)

Spontaneous radioactivity

(c)

Artificial radioactivity

(d)

a & c

37.

TFM in soaps represents ___________ content in soap

(a)

mineral

(b)

vitamin

(c)

fatty acid

(d)

carbohydrate

38.

Which of the following are used as an aesthetics?

(a)

Carboxylic acids

(b)

Ethers

(c)

Esters

(d)

Aldehydes

39.

Which of the following pairs can be the successive members of a homologous series?

(a)

C₃H₈ and C₄H₁₀

(b)

C₂H₂ and C₂H₄

(c)

CH₄and C₃H₆

(d)

C₂H₅OH and C₄H₈OH

40.

The secondary suffix used in IUPAC nomenclature of an aldehyde is ____

(a)

- ol

(b)

– oic acid

(c)

– al

(d)

- one

41.

The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?

(a)

Aldehyde

(b)

Carboxylic acid

(c)

Ketone

(d)

Alcohol

42.

The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?

(a)

speed

(b)

frequency

(c)

wavelength

(d)

none of these

43.

If a sound wave travels with a frequency of 1.25 x 10⁴ Hz at 344 ms^-1, the wavelength will be

(a)

27.52 m

(b)

275.2 m

(c)

0.02752 m

(d)

2.752 m

44.

The velocity of sound in air at a particular temperature is 330 ms^-1. What will be its value when temperature is doubled and the pressure is halved?

(a)

330 ms^-1

(b)

165 ms^-1

(c)

330 x \(\sqrt { 2 } \) ms^-1

(d)

320/\(\sqrt { 2 } \) ms^-1

45.

The frequency, which is audible to the human ear is

(a)

50 kHz

(b)

20 kHz

(c)

15000 kHz

(d)

10000 kHz

46.

When a sound wave travels through air, the air particles

(a)

vibrate along the direction of the wave motion

(b)

vibrate but not in any fixed direction

(c)

vibrate perpendicular to the direction of the wave motion

(d)

do not vibrate

47.

Kilowatt hour is the unit of

(a)

resistivity

(b)

conductivity

(c)

electrical energy

(d)

electrical power

48.

In a simple circuit, why does the bulb glow when you close the switch?

(a)

The switch produces electricity

(b)

Closing the switch completes the circuit.

(c)

Closing the switch breaks the circuit.

(d)

The bulb is getting charged.

49.

SI unit of resistance is

(a)

mho

(b)

joule

(c)

ohm

(d)

ohm meter

50.

Which of the following is correct?

(a)

Rate of change of charge is electrical power

(b)

Rate of change of charge is current.

(c)

Rate of change of energy is current.

(d)

Rate of change of current is charge.

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Answers Key:

Multiple Choice Question

50 x 1 = 50

(d)
all the above

(a)
2.0

(a)
physical

(b)
Dehydrogenation

(a)
water

(a)
Reversible reaction

(d)
Alkene and Alkyne

10.

(a)
Hydrogen Bomb

11.

(a)
parent nucleus

12.

(b)
43

13.

(b)
infrasonic waves

14.

(b)
infrasonic waves

15.

(a)
Potential difference

16.

(b)
Ammeter

17.

(b)
Micelle

18.

(d)
oic

19.

20.

(b)
1.00 x 10^-14

21.

(d)
all the above

22.

(d)
all the above

23.

24.

25.

(a)
frequency

26.

(a)
165 m/s

27.

(a)
A switch is the source of electric current in a circuit.

28.

(d)
Electrical energy

29.

30.

31.

(d)
i, ii and iv

32.

33.

(b)
Combination Reaction

34.

(b)
(i) & (ii) are correct

35.

(b)
(ii) and (iii) are correct

36.

(d)
a & c

37.

38.

(b)
Ethers

39.

(a)
C₃H₈ and C₄H₁₀

40.

41.

(d)
Alcohol

42.

(d)
none of these

43.

44.

45.

(b)
20 kHz

46.

(a)
vibrate along the direction of the wave motion

47.

48.

(b)
Closing the switch completes the circuit.

49.

50.

(b)
Rate of change of charge is current.

Tamilnadu 10th Standard Science Electricity Important Questions Study Material - QB365 Set A

QB365 Student Learing Managemnet System

Std: 10th Standard - Science

chapter: Electricity - Important Questions And Answers

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Questions:

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