MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: D. 300 J
Explanation:
The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.
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Correct Answer: A. -200 J
Explanation:
The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.
Choose an option to check your answer.
Correct Answer: B. -300 J
Explanation:
The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.
Choose an option to check your answer.
Correct Answer: C. 450 J
Explanation:
The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.
Choose an option to check your answer.
Correct Answer: D. 350 J
Explanation:
The first law conserves energy: ΔU = q − w for work done by the system.
Substitution gives the stated internal-energy change.
Choose an option to check your answer.
Correct Answer: A. Support and nourish developing sperm
Explanation:
Sertoli cells form the environment for spermatogenesis.
They also respond to follicle-stimulating hormone.
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Correct Answer: A. +6
Explanation:
Oxidation numbers sum to the overall charge of the species.
Applying standard rules gives the stated value.
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Correct Answer: B. 42000 J
Explanation:
q = mcΔT = 2×4200×5.
The required heat is 42000 J.
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Correct Answer: C. +6
Explanation:
Oxidation numbers sum to the overall charge of the species.
Applying standard rules gives the stated value.
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Correct Answer: C. 6000 J
Explanation:
q = mcΔT = 0.5×400×30.
The required heat is 6000 J.
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Correct Answer: D. −3
Explanation:
Oxidation numbers sum to the overall charge of the species.
Applying standard rules gives the stated value.
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Correct Answer: D. 10800 J
Explanation:
q = mcΔT = 1.2×900×10.
The required heat is 10800 J.
