Free MCQs & Online Quiz Practice for Exams

Q: Adding KBr to MgBr₂ solution; equilibrium shift by: (ETEA 2018)

A) K⁺ + Br⁻

B) Mg²⁺ + 2Br⁻ ⇌ MgBr₂

C) Both

D) Common-ion effect not applicable

Q: If Kc is very small: (ETEA 2018)

A) Reactants large

B) Products appreciable

C) Both appreciable

D) Equilibrium impossible

Q: Adding NH₄Cl to (NH₄)₂CO₃ decreases: (ETEA 2018)

A) NH₄⁺ concentration

B) CO₃²⁻ concentration

C) No change in CO₃²⁻

D) No change at all

Q: Ice ⇌ water; increasing pressure shifts: (ETEA 2018)

A) Forward

B) Reverse

C) All systems

D) None

Q: For N₂ + 3H₂ ⇌ 2NH₃ + heat, maximum yield at: (ETEA 2018)

A) High T & low P

B) High T & high P

C) Low T & low P

D) Low T & high P

Q: Which one of the following acids has the highest pH value? (ETEA 2006)

A) HCl

B) HNO₃

C) HF

D) H₂SO₄

Q: Which one of the following is NOT a Lewis base? (ETEA 2006)

A) CH₃NH₂

B) PH₃

C) AlCl₃

D) H₂O

Q: According to Bronsted–Lowry concept which of the following cannot act as an acid? (ETEA 2010)

A) SO₄²⁻

B) H₃O⁺

C) HSO₄⁻

D) NH₄⁺

Q: Which ion can act as both Bronsted acid and base in water? (ETEA 2010)

A) HCO₃⁻

B) CN⁻

C) NO₂⁻

D) PO₄³⁻

Q: Ionic product Kw = 0.64×10⁻¹⁴ at 18°C and 1×10⁻¹⁴ at 25°C indicates: (ETEA 2010)

A) Endothermic process

B) Exothermic process

C) Vaporization

D) 2H → H₂

Q: AlCl₃ generally behaves as: (ETEA 2012)

A) Lewis acid

B) Bronsted base

C) Bronsted acid

D) Lewis base

Q: The smaller the pKb value: (ETEA 2013)

A) Weaker base

B) Stronger base

C) Stronger acid

D) None

Q: An acid is a substance which accepts: (ETEA 2014)

A) Electron pair

B) Proton

C) Electron

D) Pair of protons

Q: Which ion acts as both Bronsted acid and base in water? (ETEA 2015)

A) CN⁻

B) SO₃²⁻

C) HCO₃⁻

D) PO₄³⁻

Q: The proton acceptor is: (ETEA 2015)

A) NH₃

B) Be₂⁺

C) HCl

D) H⁺

Q: Which aqueous solution maintains constant pH? (ETEA 2015)

A) CH₃COOH/(NH₄)₂SO₄

B) NH₄NO₃/KNO₃

C) NH₄OH/NH₄Cl

D) NH₄OH/NaCl

Q: Which acid has a strong conjugate base? (ETEA 2015)

A) CH₃COOH

B) HCl

C) HNO₃

D) H₂SO₄

Q: pH of 0.001 M NaOH solution is: (ETEA 2015)

A) 6

B) 13

C) 11

D) 12

Q: Choose the weaker acid (given pKa values): (ETEA 2016)

A) HClO₄(-10)

B) HBr(-9)

C) H₂SO₄(-3)

D) HCl(-7)

Q: Concentration of HNO₃ solution having pH = 4: (ETEA 2016)

A) 4

B) −4

C) 10⁻⁴

D) 10⁻¹⁰