Free MCQs with Answers | Military Brat Defence Academy

Q: A wave has frequency 50 Hz and wavelength 4 m. Its speed is:

Correct Answer: D. 200 m/s. Wave speed v = fλ = 50 × 4 = 200 m/s.

Q: An object is placed between F and 2F of a convex lens. The image formed is generally:

Correct Answer: B. Real, inverted and magnified beyond 2F. For an object between F and 2F, a convex lens forms a real, inverted, magnified image beyond 2F.

Q: Two resistors of 6 ohm and 3 ohm are connected in parallel. Their equivalent resistance is:

Correct Answer: B. 2 ohm. 1/R = 1/6 + 1/3 = 1/2, hence R = 2 ohm.

Q: A 2 kg body moving at 3 m/s has kinetic energy equal to:

Correct Answer: C. 9 J. K = 1/2 mv² = 1/2 × 2 × 3² = 9 J.

Q: Which reagent can distinguish an aldehyde from a ketone by producing a silver mirror with the aldehyde?

Correct Answer: B. Tollens' reagent. Tollens' reagent is reduced by aldehydes to metallic silver under appropriate conditions.

Q: Which species is the conjugate acid of NH3?

Correct Answer: B. NH4+. NH3 accepts a proton to form NH4+.

Q: The hybridisation of carbon atoms in ethene (C2H4) is:

Correct Answer: B. sp2. Each carbon in ethene has three sigma domains and is sp2 hybridised.

Q: For an exothermic reaction at equilibrium, increasing temperature generally shifts equilibrium:

Correct Answer: B. Towards reactants. Heat behaves like a product in an exothermic reaction; adding heat shifts equilibrium toward reactants.

Q: Which hormone triggers ovulation in the human menstrual cycle?

Correct Answer: B. LH surge. A mid-cycle surge of luteinizing hormone triggers ovulation.

QID #25388 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

A wave has frequency 50 Hz and wavelength 4 m. Its speed is:

Correct Answer: D. 200 m/s
Wave speed v = fλ = 50 × 4 = 200 m/s.

Question: A wave has frequency 50 Hz and wavelength 4 m. Its speed is:

A. 12.5 m/s

B. 46 m/s

C. 54 m/s

D. 200 m/s

Correct Answer: D. 200 m/sExplanation: Wave speed v = fλ = 50 × 4 = 200 m/s.

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QID #25387 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

An object is placed between F and 2F of a convex lens. The image formed is generally:

Correct Answer: B. Real, inverted and magnified beyond 2F
For an object between F and 2F, a convex lens forms a real, inverted, magnified image beyond 2F.

Question: An object is placed between F and 2F of a convex lens. The image formed is generally:

A. Virtual, erect and magnified

B. Real, inverted and magnified beyond 2F

C. Real, inverted and diminished between F and 2F

D. At infinity only

Correct Answer: B. Real, inverted and magnified beyond 2FExplanation: For an object between F and 2F, a convex lens forms a real, inverted, magnified image beyond 2F.

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QID #25386 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Two resistors of 6 ohm and 3 ohm are connected in parallel. Their equivalent resistance is:

Correct Answer: B. 2 ohm
1/R = 1/6 + 1/3 = 1/2, hence R = 2 ohm.

Question: Two resistors of 6 ohm and 3 ohm are connected in parallel. Their equivalent resistance is:

A. 1 ohm

B. 2 ohm

C. 3 ohm

D. 9 ohm

Correct Answer: B. 2 ohmExplanation: 1/R = 1/6 + 1/3 = 1/2, hence R = 2 ohm.

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QID #25385 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

A 2 kg body moving at 3 m/s has kinetic energy equal to:

Correct Answer: C. 9 J
K = 1/2 mv² = 1/2 × 2 × 3² = 9 J.

Question: A 2 kg body moving at 3 m/s has kinetic energy equal to:

A. 3 J

B. 6 J

C. 9 J

D. 18 J

Correct Answer: C. 9 JExplanation: K = 1/2 mv² = 1/2 × 2 × 3² = 9 J.

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QID #25384 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which reagent can distinguish an aldehyde from a ketone by producing a silver mirror with the aldehyde?

Correct Answer: B. Tollens' reagent
Tollens' reagent is reduced by aldehydes to metallic silver under appropriate conditions.

Question: Which reagent can distinguish an aldehyde from a ketone by producing a silver mirror with the aldehyde?

A. Benedict's solution only

B. Tollens' reagent

C. Dilute HCl

D. Sodium chloride solution

Correct Answer: B. Tollens' reagentExplanation: Tollens' reagent is reduced by aldehydes to metallic silver under appropriate conditions.

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QID #25383 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which order of increasing first ionisation enthalpy is generally correct for the period-3 elements Na, Mg and Al?

Correct Answer: A. Na < Al < Mg
Na has the lowest; Al is slightly lower than Mg because its first removed electron is from the higher-energy 3p subshell.

Question: Which order of increasing first ionisation enthalpy is generally correct for the period-3 elements Na, Mg and Al?

A. Na < Al < Mg

B. Al < Na < Mg

C. Mg < Al < Na

D. Na < Mg < Al

Correct Answer: A. Na < Al < MgExplanation: Na has the lowest; Al is slightly lower than Mg because its first removed electron is from the higher-energy 3p subshell.

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QID #25382 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which species is the conjugate acid of NH3?

Correct Answer: B. NH4+
NH3 accepts a proton to form NH4+.

Question: Which species is the conjugate acid of NH3?

A. NH2−

B. NH4+

C. N2H4

D. NO3−

Correct Answer: B. NH4+Explanation: NH3 accepts a proton to form NH4+.

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QID #25381 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

The hybridisation of carbon atoms in ethene (C2H4) is:

Correct Answer: B. sp2
Each carbon in ethene has three sigma domains and is sp2 hybridised.

Question: The hybridisation of carbon atoms in ethene (C2H4) is:

A. sp

B. sp2

C. sp3

D. dsp2

Correct Answer: B. sp2Explanation: Each carbon in ethene has three sigma domains and is sp2 hybridised.

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QID #25380 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

For an exothermic reaction at equilibrium, increasing temperature generally shifts equilibrium:

Correct Answer: B. Towards reactants
Heat behaves like a product in an exothermic reaction; adding heat shifts equilibrium toward reactants.

Question: For an exothermic reaction at equilibrium, increasing temperature generally shifts equilibrium:

A. Towards products

B. Towards reactants

C. Without any change

D. Only if a catalyst is present

Correct Answer: B. Towards reactantsExplanation: Heat behaves like a product in an exothermic reaction; adding heat shifts equilibrium toward reactants.

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QID #25379 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which hormone triggers ovulation in the human menstrual cycle?

Correct Answer: B. LH surge
A mid-cycle surge of luteinizing hormone triggers ovulation.

Question: Which hormone triggers ovulation in the human menstrual cycle?

A. FSH surge

B. LH surge

C. Progesterone surge

D. Prolactin surge

Correct Answer: B. LH surgeExplanation: A mid-cycle surge of luteinizing hormone triggers ovulation.

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QID #25378 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

The Bohr effect refers to:

Correct Answer: B. Decrease in oxygen affinity of haemoglobin when CO2/H+ increases
Increased CO2 and H+ lower haemoglobin's oxygen affinity, facilitating oxygen unloading in tissues.

Question: The Bohr effect refers to:

A. Increase in oxygen affinity of haemoglobin at low pH

B. Decrease in oxygen affinity of haemoglobin when CO2/H+ increases

C. Conversion of oxyhaemoglobin into carboxyhaemoglobin

D. Binding of oxygen to myoglobin only

Correct Answer: B. Decrease in oxygen affinity of haemoglobin when CO2/H+ increasesExplanation: Increased CO2 and H+ lower haemoglobin's oxygen affinity, facilitating oxygen unloading in tissues.

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QID #25377 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which part of the nephron is normally impermeable to water but actively transports NaCl in its thick segment?

Correct Answer: C. Ascending limb of Henle
The ascending limb, especially the thick segment, reabsorbs salts and is effectively impermeable to water.

Question: Which part of the nephron is normally impermeable to water but actively transports NaCl in its thick segment?

A. Proximal convoluted tubule

B. Descending limb of Henle

C. Ascending limb of Henle

D. Collecting duct under ADH

Correct Answer: C. Ascending limb of HenleExplanation: The ascending limb, especially the thick segment, reabsorbs salts and is effectively impermeable to water.

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QID #25376 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

In a monohybrid cross Aa × Aa, the expected phenotypic ratio under complete dominance is:

Correct Answer: B. 3:1
Aa × Aa gives genotypes 1 AA : 2 Aa : 1 aa and phenotype 3 dominant : 1 recessive.

Question: In a monohybrid cross Aa × Aa, the expected phenotypic ratio under complete dominance is:

A. 1:1

B. 3:1

C. 1:2:1

D. 9:3:3:1

Correct Answer: B. 3:1Explanation: Aa × Aa gives genotypes 1 AA : 2 Aa : 1 aa and phenotype 3 dominant : 1 recessive.

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QID #25375 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

Which immunoglobulin can cross the human placenta most effectively?

Correct Answer: C. IgG
IgG is the principal immunoglobulin class that crosses the placenta.

Question: Which immunoglobulin can cross the human placenta most effectively?

A. IgA

B. IgE

C. IgG

D. IgM

Correct Answer: C. IgGExplanation: IgG is the principal immunoglobulin class that crosses the placenta.

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QID #25374 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Medium

During the light reaction of photosynthesis, photolysis of water directly produces:

Correct Answer: B. O2, protons and electrons
Photolysis splits water into oxygen, hydrogen ions and electrons.

Question: During the light reaction of photosynthesis, photolysis of water directly produces:

A. CO2, ATP and glucose

B. O2, protons and electrons

C. NADPH, glucose and O2

D. Only ATP and O2

Correct Answer: B. O2, protons and electronsExplanation: Photolysis splits water into oxygen, hydrogen ions and electrons.

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QID #25373 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Easy

If SOUTH is written as TPVUI by shifting every letter one step forward, how is NORTH written?

Correct Answer: A. OPSUI
N→O, O→P, R→S, T→U, H→I, giving OPSUI.

Question: If SOUTH is written as TPVUI by shifting every letter one step forward, how is NORTH written?

A. OPSUI

B. OPSVI

C. OQSVI

D. OPSWH

Correct Answer: A. OPSUIExplanation: N→O, O→P, R→S, T→U, H→I, giving OPSUI.

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QID #25372 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Easy

Find the next number: 2, 4, 8, 16, __.

Correct Answer: D. 32
Each term is multiplied by 2, so the next term is 32.

Question: Find the next number: 2, 4, 8, 16, __.

A. 20

B. 24

C. 30

D. 32

Correct Answer: D. 32Explanation: Each term is multiplied by 2, so the next term is 32.

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QID #25371 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Easy

Fill in the blank: She ___ to the library every Sunday.

Correct Answer: B. goes
With third-person singular subject 'she' in simple present, 'goes' is correct.

Question: Fill in the blank: She ___ to the library every Sunday.

A. go

B. goes

C. going

D. gone

Correct Answer: B. goesExplanation: With third-person singular subject 'she' in simple present, 'goes' is correct.

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QID #25370 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Easy

Choose the correct synonym of 'vital'.

Correct Answer: B. Essential
'Vital' commonly means essential or extremely important.

Question: Choose the correct synonym of 'vital'.

A. Trivial

B. Essential

C. Optional

D. Rare

Correct Answer: B. EssentialExplanation: 'Vital' commonly means essential or extremely important.

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QID #25369 MNS MNS Full Mock Test 2026-12th Entry MNS Full Mock Test 13 - Latest CBT 2026 Easy

Choose the correctly spelled word.

Correct Answer: B. Accommodation
The correct spelling is 'accommodation'.

Question: Choose the correctly spelled word.

A. Accomodation

B. Accommodation

C. Acommodation

D. Accommmodation

Correct Answer: B. AccommodationExplanation: The correct spelling is 'accommodation'.

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Free MCQs with Answers | Military Brat Defence Academy

A wave has frequency 50 Hz and wavelength 4 m. Its speed is:

An object is placed between F and 2F of a convex lens. The image formed is generally:

Two resistors of 6 ohm and 3 ohm are connected in parallel. Their equivalent resistance is:

A 2 kg body moving at 3 m/s has kinetic energy equal to:

Which reagent can distinguish an aldehyde from a ketone by producing a silver mirror with the aldehyde?

Which order of increasing first ionisation enthalpy is generally correct for the period-3 elements Na, Mg and Al?

Which species is the conjugate acid of NH3?

The hybridisation of carbon atoms in ethene (C2H4) is:

For an exothermic reaction at equilibrium, increasing temperature generally shifts equilibrium:

Which hormone triggers ovulation in the human menstrual cycle?

The Bohr effect refers to:

Which part of the nephron is normally impermeable to water but actively transports NaCl in its thick segment?

In a monohybrid cross Aa × Aa, the expected phenotypic ratio under complete dominance is:

Which immunoglobulin can cross the human placenta most effectively?

During the light reaction of photosynthesis, photolysis of water directly produces:

If SOUTH is written as TPVUI by shifting every letter one step forward, how is NORTH written?

Find the next number: 2, 4, 8, 16, __.

Fill in the blank: She ___ to the library every Sunday.

Choose the correct synonym of 'vital'.

Choose the correctly spelled word.

Free MCQs with Answers and Explanations