JEE CHEMISTRY UNIT 06
QUIZ NO 2
TOTAL QUESTIONS = 20
1. The value of pH for a neutral solution at 25°C is
A. 14
B. 7
C. 1
D. 0
2. The pH of a 10^-8 M HCl solution is approximately
A. 8
B. 7
C. 7.04
D. 6.96
3. The solubility of AgCl in water increases in the presence of
A. KCl
B. NH3
C. HCl
D. NaCl
4. Which of the following represents the Henderson-Hasselbalch equation?
A. pH = pKa × log([Salt]/[Acid])
B. pH = pKa + log([Salt]/[Acid])
C. pH = pKa - log([Salt]/[Acid])
D. pH = pKa / log([Salt]/[Acid])
5. Le Chatelier's principle is used to predict the effect of
A. Temperature, pressure, and concentration changes
B. Only concentration changes
C. Only pressure changes
D. Only temperature changes
6. The solubility product (Ksp) of AgCl is given as 1.8 × 10^-10. Its solubility in pure water is approximately
A. 1.34 × 10^-5 M
B. 4.28 × 10^-5 M
C. 3.14 × 10^-5 M
D. 2.34 × 10^-5 M
7. Which of the following statements is true for a neutral solution at 25°C?
A. pH = 7
B. All of the above
C. H+ concentration equals OH- concentration
D. pOH = 7
8. The pH of 0.01 M NaOH solution is
A. 12
B. 13
C. 2
D. 1
9. For a reaction A ⇌ B, if Kc > 1, then
A. Formation of B is favored
B. Reaction is at equilibrium
C. Formation of A is favored
D. Both A and B are equally favored
10. The pKa value of a strong acid is
A. Negative
B. Low
C. Zero
D. High
11. The equilibrium constant (Kp) for the reaction N2 + 3H2 ⇌ 2NH3 is expressed as
A. Kp = (PNH3)^3 / (PN2)(PH2)^2
B. Kp = (PNH3)^2 / (PN2)(PH2)^3
C. Kp = (PN2)(PH2)^3 / (PNH3)^2
D. Kp = (PH2)^3 / (PNH3)(PN2)
12. Which of the following is a Lewis acid?
A. CH4
B. NH3
C. H2O
D. BF3
13. The ionization constant (Ka) of a weak acid is
A. Very high
B. Moderate
C. Very low
D. Equal to 1
14. Which of the following acids has the highest dissociation constant?
A. H2SO4
B. HCl
C. CH3COOH
D. HNO3
15. The common ion effect is used to
A. Increase solubility of a salt
B. Increase the dissociation of an acid
C. Decrease solubility of a salt
D. Change the pH of a solution
16. The solubility product (Ksp) is applicable for
A. Supersaturated solutions
B. Saturated solutions
C. Dilute solutions
D. Unsaturated solutions
17. The pKa value of acetic acid is 4.76. What is the pH of a buffer containing 0.1 M acetic acid and 0.1 M sodium acetate?
A. 4.76
B. 7
C. 5
D. 6
18. Which of the following has the maximum pH?
A. 0.1 M NaOH
B. 0.1 M HCl
C. 0.1 M NH4Cl
D. 0.1 M CH3COOH
19. Which of the following is not a colligative property?
A. Boiling point elevation
B. Freezing point depression
C. Equilibrium constant
D. Vapor pressure lowering
20. For a buffer solution, the pH is maximum when
A. pH > pKa
B. pH = 7
C. pH < pKa
D. pH = pKa
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