MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: A. sp
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. Velocity or Reynolds number becomes sufficiently high
Explanation:
Fluid motion follows force balance and conservation principles.
The stated explanation matches the described flow condition.
Choose an option to check your answer.
Correct Answer: B. CO₂
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. Speed rises and static pressure tends to fall
Explanation:
Fluid motion follows force balance and conservation principles.
The stated explanation matches the described flow condition.
Choose an option to check your answer.
Correct Answer: C. HF
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. Head-on orbital overlap
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: A. Sideways overlap of parallel p orbitals
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. CH₄
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: C. 12 m/s
Explanation:
Conservation of mass for steady incompressible flow gives A₁v₁=A₂v₂.
Solving gives the stated speed.
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Correct Answer: D. 2 m/s
Explanation:
Conservation of mass for steady incompressible flow gives A₁v₁=A₂v₂.
Solving gives the stated speed.
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Correct Answer: A. Principal quantum number n
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: B. 1s² 2s² 2p⁶ 3s¹
Explanation:
Atomic orbitals and electron-pair repulsions determine bonding and molecular shape.
The stated option follows the relevant electronic or VSEPR rule.
