Free MCQs with Answers | Military Brat Defence Academy

Q: Ethanoic acid belongs to which class?

Correct Answer: B. carboxylic acids. Ethanoic acid is a carboxylic acid.

Q: Which property is typical of metals?

Correct Answer: B. good electrical conductivity. Metals are generally good electrical conductors.

Q: An element with a completely filled outer shell is generally:

Correct Answer: B. chemically stable. A filled valence shell generally gives stability.

Q: The change from gas to liquid is called:

Correct Answer: A. condensation. Gas changes to liquid by condensation.

Q: The change from solid directly to gas is called:

Correct Answer: B. sublimation. Direct solid-to-gas change is sublimation.

Q: A fuel with higher calorific value releases:

Correct Answer: B. more heat per unit mass. Calorific value measures heat released per unit fuel.

Q: The ozone layer mainly protects Earth from:

Correct Answer: B. ultraviolet radiation. Ozone absorbs much harmful UV radiation.

Q: An atom has atomic number 12. Its number of protons is:

Correct Answer: A. 12. Atomic number equals the number of protons.

Q: A solution has pH 4. It is:

Correct Answer: A. acidic. A pH below 7 indicates an acidic solution.

QID #1145327 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

Ethanoic acid belongs to which class?

Correct Answer: B. carboxylic acids
Ethanoic acid is a carboxylic acid.

Question: Ethanoic acid belongs to which class?

A. alcohols

B. carboxylic acids

C. alkanes

D. amines

Correct Answer: B. carboxylic acidsExplanation: Ethanoic acid is a carboxylic acid.

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QID #1145326 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

Which property is typical of metals?

Correct Answer: B. good electrical conductivity
Metals are generally good electrical conductors.

Question: Which property is typical of metals?

A. poor electrical conductivity

B. good electrical conductivity

C. brittleness in all cases

D. no lustre

Correct Answer: B. good electrical conductivityExplanation: Metals are generally good electrical conductors.

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QID #1145325 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

An element with a completely filled outer shell is generally:

Correct Answer: B. chemically stable
A filled valence shell generally gives stability.

Question: An element with a completely filled outer shell is generally:

A. highly reactive

B. chemically stable

C. always metallic

D. always radioactive

Correct Answer: B. chemically stableExplanation: A filled valence shell generally gives stability.

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QID #1145324 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

The change from gas to liquid is called:

Correct Answer: A. condensation
Gas changes to liquid by condensation.

Question: The change from gas to liquid is called:

A. condensation

B. evaporation

C. sublimation

D. fusion

Correct Answer: A. condensationExplanation: Gas changes to liquid by condensation.

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QID #1145323 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

The change from solid directly to gas is called:

Correct Answer: B. sublimation
Direct solid-to-gas change is sublimation.

Question: The change from solid directly to gas is called:

A. melting

B. sublimation

C. condensation

D. freezing

Correct Answer: B. sublimationExplanation: Direct solid-to-gas change is sublimation.

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QID #1145322 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A fuel with higher calorific value releases:

Correct Answer: B. more heat per unit mass
Calorific value measures heat released per unit fuel.

Question: A fuel with higher calorific value releases:

A. less heat per unit mass

B. more heat per unit mass

C. no heat

D. only light

Correct Answer: B. more heat per unit massExplanation: Calorific value measures heat released per unit fuel.

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QID #1145321 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

The ozone layer mainly protects Earth from:

Correct Answer: B. ultraviolet radiation
Ozone absorbs much harmful UV radiation.

Question: The ozone layer mainly protects Earth from:

A. visible light

B. ultraviolet radiation

C. radio waves

D. sound waves

Correct Answer: B. ultraviolet radiationExplanation: Ozone absorbs much harmful UV radiation.

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QID #1145320 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

An atom has atomic number 12. Its number of protons is:

Correct Answer: A. 12
Atomic number equals the number of protons.

Question: An atom has atomic number 12. Its number of protons is:

A. 12

B. 13

C. 11

D. 18

Correct Answer: A. 12Explanation: Atomic number equals the number of protons.

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QID #1145319 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A solution has pH 4. It is:

Correct Answer: A. acidic
A pH below 7 indicates an acidic solution.

Question: A solution has pH 4. It is:

A. acidic

B. basic

C. neutral

D. metallic

Correct Answer: A. acidicExplanation: A pH below 7 indicates an acidic solution.

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QID #1145318 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

An element X has valency 3. If oxygen has valency 2, which statement is useful while writing the simplest oxide formula?

Correct Answer: A. Criss-cross the valencies and simplify the ratio
The criss-cross method uses valencies to obtain the simplest combining ratio.

Question: An element X has valency 3. If oxygen has valency 2, which statement is useful while writing the simplest oxide formula?

A. Criss-cross the valencies and simplify the ratio

B. Add the valencies only

C. Ignore oxygen's valency

D. Use atomic masses instead

Correct Answer: A. Criss-cross the valencies and simplify the ratioExplanation: The criss-cross method uses valencies to obtain the simplest combining ratio.

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QID #1145317 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A prism can split white light into colours due to:

Correct Answer: B. dispersion
Dispersion separates colours because refractive index varies with wavelength.

Question: A prism can split white light into colours due to:

A. reflection only

B. dispersion

C. conduction

D. polarization only

Correct Answer: B. dispersionExplanation: Dispersion separates colours because refractive index varies with wavelength.

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QID #1145316 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

The earth wire is used mainly for:

Correct Answer: B. safety against electric shock
Earthing provides a safer path for fault current.

Question: The earth wire is used mainly for:

A. increasing voltage

B. safety against electric shock

C. reducing frequency

D. increasing power

Correct Answer: B. safety against electric shockExplanation: Earthing provides a safer path for fault current.

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QID #1145315 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A fuse is connected in a circuit mainly to:

Correct Answer: B. protect against excess current
A fuse protects a circuit from excessive current.

Question: A fuse is connected in a circuit mainly to:

A. increase current

B. protect against excess current

C. raise voltage

D. store charge

Correct Answer: B. protect against excess currentExplanation: A fuse protects a circuit from excessive current.

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QID #1145314 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A heat engine converts heat energy mainly into:

Correct Answer: A. mechanical work
Heat engines convert thermal energy into mechanical work.

Question: A heat engine converts heat energy mainly into:

A. mechanical work

B. chemical energy

C. mass

D. pressure only

Correct Answer: A. mechanical workExplanation: Heat engines convert thermal energy into mechanical work.

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QID #1145313 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

The Sun produces energy mainly through:

Correct Answer: B. nuclear fusion
Solar energy is produced by nuclear fusion.

Question: The Sun produces energy mainly through:

A. combustion

B. nuclear fusion

C. nuclear fission

D. chemical reaction

Correct Answer: B. nuclear fusionExplanation: Solar energy is produced by nuclear fusion.

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QID #1145312 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A sample has mass 500 g and volume 50 cm³. Density is:

Correct Answer: A. 10 g/cm³
Density = mass/volume.

Question: A sample has mass 500 g and volume 50 cm³. Density is:

A. 10 g/cm³

B. 25000 g/cm³

C. 0.1 g/cm³

D. 550 g/cm³

Correct Answer: A. 10 g/cm³Explanation: Density = mass/volume.

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QID #1145311 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A wave has frequency 60 Hz and wavelength 2 m. Its speed is:

Correct Answer: A. 120 m/s
Wave speed v=fλ.

Question: A wave has frequency 60 Hz and wavelength 2 m. Its speed is:

A. 120 m/s

B. 30 m/s

C. 62 m/s

D. 0.0333333 m/s

Correct Answer: A. 120 m/sExplanation: Wave speed v=fλ.

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QID #1145310 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A current of 4 A flows through a resistance of 3 Ω. The voltage is:

Correct Answer: A. 12 V
Ohm's law: V = IR.

Question: A current of 4 A flows through a resistance of 3 Ω. The voltage is:

A. 12 V

B. 7 V

C. 0.75 V

D. 1.33333 V

Correct Answer: A. 12 VExplanation: Ohm's law: V = IR.

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QID #1145309 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

A force of 70 N moves an object 4 m in the force direction. Work done is:

Correct Answer: A. 280 J
Work = force × displacement.

Question: A force of 70 N moves an object 4 m in the force direction. Work done is:

A. 280 J

B. 74 J

C. 17.5 J

D. 560 J

Correct Answer: A. 280 JExplanation: Work = force × displacement.

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QID #1145308 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 30 Medium

An object has initial velocity 3 m/s and acceleration 2 m/s² for 4 s. Final velocity is:

Correct Answer: A. 11 m/s
Use v = u + at.

Question: An object has initial velocity 3 m/s and acceleration 2 m/s² for 4 s. Final velocity is:

A. 11 m/s

B. 12 m/s

C. 8 m/s

D. 13 m/s

Correct Answer: A. 11 m/sExplanation: Use v = u + at.

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Free MCQs with Answers | Military Brat Defence Academy

Ethanoic acid belongs to which class?

Which property is typical of metals?

An element with a completely filled outer shell is generally:

The change from gas to liquid is called:

The change from solid directly to gas is called:

A fuel with higher calorific value releases:

The ozone layer mainly protects Earth from:

An atom has atomic number 12. Its number of protons is:

A solution has pH 4. It is:

An element X has valency 3. If oxygen has valency 2, which statement is useful while writing the simplest oxide formula?

A prism can split white light into colours due to:

The earth wire is used mainly for:

A fuse is connected in a circuit mainly to:

A heat engine converts heat energy mainly into:

The Sun produces energy mainly through:

A sample has mass 500 g and volume 50 cm³. Density is:

A wave has frequency 60 Hz and wavelength 2 m. Its speed is:

A current of 4 A flows through a resistance of 3 Ω. The voltage is:

A force of 70 N moves an object 4 m in the force direction. Work done is:

An object has initial velocity 3 m/s and acceleration 2 m/s² for 4 s. Final velocity is:

Free MCQs with Answers and Explanations