MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: C. s orbital
Explanation:
Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.
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Correct Answer: D. Singly with parallel spins
Explanation:
Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.
Choose an option to check your answer.
Correct Answer: A. Trigonal planar
Explanation:
Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.
Choose an option to check your answer.
Correct Answer: B. Trigonal pyramidal
Explanation:
Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.
Choose an option to check your answer.
Correct Answer: B. 12000 J
Explanation:
q = mcΔT = 3×500×8.
The required heat is 12000 J.
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Correct Answer: C. 0.46 V
Explanation:
For standard reduction potentials, E°cell = E°cathode − E°anode.
The positive result indicates a spontaneous standard cell reaction.
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Correct Answer: C. -150 kJ mol⁻¹
Explanation:
Hess’s law states that enthalpy changes add for sequential steps.
The overall value is the algebraic sum of the two changes.
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Correct Answer: D. 0.82 V
Explanation:
For standard reduction potentials, E°cell = E°cathode − E°anode.
The positive result indicates a spontaneous standard cell reaction.
Choose an option to check your answer.
Correct Answer: D. -120 kJ mol⁻¹
Explanation:
Hess’s law states that enthalpy changes add for sequential steps.
The overall value is the algebraic sum of the two changes.
Choose an option to check your answer.
Correct Answer: A. -150 kJ mol⁻¹
Explanation:
Hess’s law states that enthalpy changes add for sequential steps.
The overall value is the algebraic sum of the two changes.
Choose an option to check your answer.
Correct Answer: B. -50 kJ mol⁻¹
Explanation:
Hess’s law states that enthalpy changes add for sequential steps.
The overall value is the algebraic sum of the two changes.
Choose an option to check your answer.
Correct Answer: C. -150 kJ mol⁻¹
Explanation:
Hess’s law states that enthalpy changes add for sequential steps.
The overall value is the algebraic sum of the two changes.
