Free MCQs & Online Quiz Practice for Exams

Q: For solids and liquids, the relationship between H and E is

A) ΔH = ΔE

B) ΔH > ΔE

C) ΔH < ΔE

D) ΔE =0

Q: 1 kcal is equal to

A) 41.8 × 10³ J

B) 418 × 10³ J

C) 4.18 × 10³ J

D) 418 J

Q: Standard enthalpy (ΔH°) for 1 mole of a substance, which exists in its natural state, at 1 atm pressure, is measured at

A) 0 K

B) 298 K

C) 273 K

D) 0 °C

Q: ΔH can be measured indirectly by applying

A) Avogadro's law

B) Gas laws

C) Hess's law

D) Faraday's law

Q: Enthalpy means

A) Disorder

B) Transition state

C) Rate constant

D) Heat content

Q: No work is done at constant

A) Pressure

B) Volume

C) Temperature

D) Mass

Q: Heat capacity depends on

A) Pressure

B) Volume

C) Composition

D) Mass

Q: Which one of the following reactions is spontaneous?

A) Endothermic

B) Exothermic

C) Reversible

D) Irreversible

Q: The energy possessed by water in a dam is

A) Potential energy

B) Kinetic energy

C) Electric energy

D) Heat energy

Q: When heat is absorbed from the surroundings, the process is

A) Reversible

B) Mechanical

C) Exothermic

D) Endothermic

Q: The sum of the energies of all the molecules or atoms of a substance is called its

A) Specific heat

B) Heat capacity

C) Latent heat

D) Internal energy

Q: Which one of the following processes has ΔH positive?

A) Ionization energy

B) Electron affinity

C) Combustion

D) Exothermic reaction

Q: A weak electrolyte in solution is

A) Completely ionized

B) Slightly ionized

C) Never ionized

D) Destroyed

Q: Which one of the following is a strong electrolyte in solution?

A) Ammonium hydroxide

B) Carbonic acid

C) Potassium iodide

D) Acetic acid

Q: In an electrolytic cell, the cathode has a charge

A) Positive

B) Negative

C) Neutral

D) Zero

Q: The oxidation number of Cl in HClO₃ is

A) -1

B) +1

C) +3

D) +5

Q: Which one of the following is a reduction reaction?

A) Br₂ → 2Br⁻¹

B) Fe⁺³ → Fe⁺²

C) Zn → Zn⁺²

D) Zn → Al

Q: A cell in which non-spontaneous redox reaction is carried out by passing an Electric current is a/an

A) Galvanic cell

B) Voltaic cell

C) Daniell cell

D) Electrolytic cell

Q: Electrolysis is a process in which the cations and anions liberated from electrolytes are:

A) Hydrated

B) Hydrolyzed

C) Charged

D) Discharged

Q: A cell which produces electric current by a redox reaction is called a

A) Voltaic cell

B) Electrolytic cell

C) Half-cell

D) Standard cell