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Free MCQs with Answers | Military Brat Defence Academy

Q: An electrochemical cell converts chemical energy into:

Correct Answer: B. electrical energy. An electrochemical cell produces electrical energy from chemical reactions.

Q: The functional group in alcohols is:

Correct Answer: B. -OH. Alcohols contain the hydroxyl (-OH) group.

Q: The simplest hydrocarbon is:

Correct Answer: A. methane. Methane, CH4, is the simplest hydrocarbon.

Q: Rusting of iron requires oxygen and:

Correct Answer: B. moisture. Rusting needs oxygen and moisture.

Q: Which metal is liquid at room temperature?

Correct Answer: B. Mercury. Mercury is liquid at room temperature.

Q: A solution with pH less than 7 is generally:

Correct Answer: B. acidic. pH below 7 indicates acidity.

Q: An atom has atomic number 13. Its number of protons is:

Correct Answer: A. 13. Atomic number equals the number of protons.

Q: A solution has pH 5. It is:

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

Q: The SI unit of electric current is:

Correct Answer: B. Ampere. Electric current is measured in amperes.

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QID #1144707 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

An electrochemical cell converts chemical energy into:

Correct Answer: B. electrical energy
An electrochemical cell produces electrical energy from chemical reactions.

Question: An electrochemical cell converts chemical energy into:

A. nuclear energy

B. electrical energy

C. sound only

D. mass

Correct Answer: B. electrical energyExplanation: An electrochemical cell produces electrical energy from chemical reactions.

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QID #1144706 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

The functional group in alcohols is:

Correct Answer: B. -OH
Alcohols contain the hydroxyl (-OH) group.

Question: The functional group in alcohols is:

A. -COOH

B. -OH

C. -CHO

D. -NH2

Correct Answer: B. -OHExplanation: Alcohols contain the hydroxyl (-OH) group.

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QID #1144705 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

The simplest hydrocarbon is:

Correct Answer: A. methane
Methane, CH4, is the simplest hydrocarbon.

Question: The simplest hydrocarbon is:

A. methane

B. ethane

C. ethene

D. benzene

Correct Answer: A. methaneExplanation: Methane, CH4, is the simplest hydrocarbon.

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QID #1144704 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

Rusting of iron requires oxygen and:

Correct Answer: B. moisture
Rusting needs oxygen and moisture.

Question: Rusting of iron requires oxygen and:

A. nitrogen

B. moisture

C. hydrogen

D. carbon dioxide only

Correct Answer: B. moistureExplanation: Rusting needs oxygen and moisture.

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QID #1144703 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

Which metal is liquid at room temperature?

Correct Answer: B. Mercury
Mercury is liquid at room temperature.

Question: Which metal is liquid at room temperature?

A. Iron

B. Mercury

C. Copper

D. Aluminium

Correct Answer: B. MercuryExplanation: Mercury is liquid at room temperature.

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QID #1144702 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A solution with pH less than 7 is generally:

Correct Answer: B. acidic
pH below 7 indicates acidity.

Question: A solution with pH less than 7 is generally:

A. basic

B. acidic

C. neutral

D. salty only

Correct Answer: B. acidicExplanation: pH below 7 indicates acidity.

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QID #1144701 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

An atom has atomic number 13. Its number of protons is:

Correct Answer: A. 13
Atomic number equals the number of protons.

Question: An atom has atomic number 13. Its number of protons is:

A. 13

B. 14

C. 12

D. 19

Correct Answer: A. 13Explanation: Atomic number equals the number of protons.

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QID #1144700 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A solution has pH 5. It is:

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

Question: A solution has pH 5. 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 #1144699 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

An element X has valency 4. 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 4. 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 #1144698 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

The SI unit of electric current is:

Correct Answer: B. Ampere
Electric current is measured in amperes.

Question: The SI unit of electric current is:

A. Volt

B. Ampere

C. Ohm

D. Coulomb

Correct Answer: B. AmpereExplanation: Electric current is measured in amperes.

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QID #1144697 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A convex lens can form:

Correct Answer: B. real and virtual images
A convex lens can form real or virtual images depending on object position.

Question: A convex lens can form:

A. only virtual images

B. real and virtual images

C. only erect images

D. no images

Correct Answer: B. real and virtual imagesExplanation: A convex lens can form real or virtual images depending on object position.

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QID #1144696 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

The angle of incidence equals the angle of reflection. This is a law of:

Correct Answer: B. Reflection
This is the law of reflection.

Question: The angle of incidence equals the angle of reflection. This is a law of:

A. Refraction

B. Reflection

C. Diffraction

D. Dispersion

Correct Answer: B. ReflectionExplanation: This is the law of reflection.

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QID #1144695 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

Heat naturally flows from:

Correct Answer: B. hot body to cold body
Heat flows spontaneously from higher to lower temperature.

Question: Heat naturally flows from:

A. cold body to hot body

B. hot body to cold body

C. low mass to high mass

D. vacuum to matter

Correct Answer: B. hot body to cold bodyExplanation: Heat flows spontaneously from higher to lower temperature.

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QID #1144694 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A sample has mass 350 g and volume 50 cm³. Density is:

Correct Answer: A. 7 g/cm³
Density = mass/volume.

Question: A sample has mass 350 g and volume 50 cm³. Density is:

A. 7 g/cm³

B. 17500 g/cm³

C. 0.142857 g/cm³

D. 400 g/cm³

Correct Answer: A. 7 g/cm³Explanation: Density = mass/volume.

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QID #1144693 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A wave has frequency 65 Hz and wavelength 2 m. Its speed is:

Correct Answer: A. 130 m/s
Wave speed v=fλ.

Question: A wave has frequency 65 Hz and wavelength 2 m. Its speed is:

A. 130 m/s

B. 32.5 m/s

C. 67 m/s

D. 0.0307692 m/s

Correct Answer: A. 130 m/sExplanation: Wave speed v=fλ.

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QID #1144692 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A current of 5 A flows through a resistance of 3 Ω. The voltage is:

Correct Answer: A. 15 V
Ohm's law: V = IR.

Question: A current of 5 A flows through a resistance of 3 Ω. The voltage is:

A. 15 V

B. 8 V

C. 0.6 V

D. 1.66667 V

Correct Answer: A. 15 VExplanation: Ohm's law: V = IR.

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QID #1144691 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A force of 40 N moves an object 5 m in the force direction. Work done is:

Correct Answer: A. 200 J
Work = force × displacement.

Question: A force of 40 N moves an object 5 m in the force direction. Work done is:

A. 200 J

B. 45 J

C. 8 J

D. 400 J

Correct Answer: A. 200 JExplanation: Work = force × displacement.

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QID #1144690 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

An object has initial velocity 3 m/s and acceleration 2 m/s² for 5 s. Final velocity is:

Correct Answer: A. 13 m/s
Use v = u + at.

Question: An object has initial velocity 3 m/s and acceleration 2 m/s² for 5 s. Final velocity is:

A. 13 m/s

B. 15 m/s

C. 10 m/s

D. 15 m/s

Correct Answer: A. 13 m/sExplanation: Use v = u + at.

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QID #1144689 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

The binary representation of decimal 10 is:

Correct Answer: B. 1010
10 in binary is 1010.

Question: The binary representation of decimal 10 is:

A. 1001

B. 1010

C. 1100

D. 1110

Correct Answer: B. 1010Explanation: 10 in binary is 1010.

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QID #1144688 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 15 Medium

A bag has 5 red and 3 blue balls. Probability of drawing a red ball is:

Correct Answer: A. 5/8
Probability = favorable outcomes / total outcomes.

Question: A bag has 5 red and 3 blue balls. Probability of drawing a red ball is:

A. 5/8

B. 3/8

C. 1/8

D. 4/8

Correct Answer: A. 5/8Explanation: Probability = favorable outcomes / total outcomes.

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