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Q: Which of the following is an acid? (ETEA 2017)

A) OH⁻

B) PH₃

C) HCO₃⁻

D) SO₄²⁻

Q: If pH = 9, OH⁻ concentration is: (ETEA 2018)

A) 10⁻⁵

B) 5

C) 10⁻⁹

D) 9

Q: Species with strongest conjugate base in aqueous solution: (ETEA 2018)

A) HI

B) HNO₃

C) CH₃COOH

D) HClO₄

Q: Which pair cannot form a buffer? (ETEA 2018)

A) KH₂PO₄/H₃PO₄

B) NaClO/HClO

C) CH₃COOH/CH₃COONa

D) NH₄OH/NH₄Cl

Q: Correct Henderson–Hasselbalch equation: (ETEA 2018)

A) pKa − log(Salt/Acid)

B) pKa × log(Acid/Salt)

C) Ka + log(Salt/Acid)

D) pKa + log(Salt/Acid)

Q: Why ethanoic acid is stronger in liquid ammonia than water? (ETEA 2019)

A) NH₃ stronger base

B) H-bonding with water

C) More soluble in NH₃

D) None

Q: Which forms acidic solution in water? (ETEA 2019)

A) Na₂CO₃

B) CH₃COONa

C) NH₄Cl

D) FeCO₃

Q: Strongest base among the following: (ETEA 2019)

A) Cl⁻

B) Br⁻

C) I⁻

D) CH₃COO⁻

Q: When NH₄CN dissolves in water, solution becomes: (ETEA 2019)

A) Neutral

B) Acidic

C) Basic

D) Both (b) & (c)

Q: For which reaction of the unit of rate constant 'k' is the same as that of the reaction rate? (ETEA 2008)

A) Zero order

B) First order

C) Second order

D) Third order

Q: Consider the following general reaction TA + 1B → products. Rate of reaction is expressed as rate = K[A][B]. The correct order of reaction and molecularity is: (ETEA 2008)

A) 2:02

B) 2:03

C) 3:02

D) 3:03

Q: Which of the following is correct? (ETEA 2008)

A) Molecularity of a reaction is same as the order of reaction

B) In some cases molecularity of a reaction is the same as order of reaction

C) Molecularity of a reaction is more than order of reaction

D) All are correct

Q: The unit of 3/2 order rate constant is: (ETEA 2009)

A) Sec

B) Mol·dm⁻³·sec⁻¹

C) None of above

D) None of above

Q: A catalyst is more effective when it is in the finely divided state because: (ETEA 2009)

A) The valence electrons are easily available

B) This increases the surface area of the catalyst

C) It attains equilibrium quickly

D) All of the above

Q: The rate of reaction is defined as: (ETEA 2010)

A) dC/dt

B) dC/dt

C) dC/dt

D) dC/dt

Q: The rate law for the reaction A →C, Rate = k[A]. The unit of k will be: (ETEA 2012)

A) Mole⁻¹dm³s⁻¹

B) Mole¹dm⁻³s⁻¹

C) s⁻¹

D) Mole⁻¹dm³

Q: The chemical method used for the determination of reaction rate: (ETEA 2012)

A) Conductometry

B) Polarimetry

C) pH metry

D) Volumetric analysis

Q: The order of chemical reaction can be measured by: (ETEA 2012)

A) Half life method

B) Differential method

C) Ostwald method

D) All of these

Q: The addition of a catalyst to a chemical reaction changes: (ETEA 2013)

A) The enthalpy

B) The entropy

C) The activation energy

D) The free energy

Q: The hydrolysis of urea into ammonia and CO₂ takes place in the presence of a catalyst urease as shown: NH₂CONH₂ + H₂O →(Urease)→ 2NH₃ + CO₂. The type of above catalysis is: (ETEA 2014)

A) Homogenous catalysis

B) Heterogeneous catalysis

C) Enzyme catalysis

D) None of these