Section 1: Chem/Phys (Q1–25)
What is the pH of a 1×10⁻³ M HCl solution?
A. 1
B. 2
C. 3
D. 11
Answer: C
Rationale: Strong acid fully dissociates → pH = 3.
2. Which law relates pressure and volume inversely?
A. Charles’ Law
B. Boyle’s Law
C. Avogadro’s Law
D. Dalton’s Law
Answer: B
Rationale: Boyle: P ∝ 1/V.
3. SI unit of energy?
A. Watt
B. Joule
C. Pascal
D. Volt
Answer: B
Rationale: Joule is energy.
4. Increasing temperature increases reaction rate because:
A. Decreases entropy
B. More collisions exceed activation energy
, C. Reduces concentration
D. Lowers energy
Answer: B
5. Which has highest electronegativity?
A. O
B. F
C. N
D. Cl
Answer: B
6. Capacitors in parallel:
A. Decrease total capacitance
B. Increase total capacitance
C. No change
D. Infinite resistance
Answer: B
7. Frequency increases → wavelength:
A. Increases
B. Decreases
C. Same
D. Zero
Answer: B
8. Which is a reducing agent?
A. Gains electrons
B. Loses electrons
C. Neutral
D. None
Answer: B
9. Ideal gas assumption:
A. Molecules attract strongly
B. No volume
What is the pH of a 1×10⁻³ M HCl solution?
A. 1
B. 2
C. 3
D. 11
Answer: C
Rationale: Strong acid fully dissociates → pH = 3.
2. Which law relates pressure and volume inversely?
A. Charles’ Law
B. Boyle’s Law
C. Avogadro’s Law
D. Dalton’s Law
Answer: B
Rationale: Boyle: P ∝ 1/V.
3. SI unit of energy?
A. Watt
B. Joule
C. Pascal
D. Volt
Answer: B
Rationale: Joule is energy.
4. Increasing temperature increases reaction rate because:
A. Decreases entropy
B. More collisions exceed activation energy
, C. Reduces concentration
D. Lowers energy
Answer: B
5. Which has highest electronegativity?
A. O
B. F
C. N
D. Cl
Answer: B
6. Capacitors in parallel:
A. Decrease total capacitance
B. Increase total capacitance
C. No change
D. Infinite resistance
Answer: B
7. Frequency increases → wavelength:
A. Increases
B. Decreases
C. Same
D. Zero
Answer: B
8. Which is a reducing agent?
A. Gains electrons
B. Loses electrons
C. Neutral
D. None
Answer: B
9. Ideal gas assumption:
A. Molecules attract strongly
B. No volume
