Free MCQs & Online Quiz Practice for Exams

Q: The change of enthalpy is a measure of the reaction at: (ETEA 2008)

A) Constant volume

B) Constant volume & pressure

C) Variable pressure

D) Constant pressure

Q: Ca²⁺ ions are more hydrated than Na⁺ ions because there are: (ETEA 2010)

A) Larger in size

B) Smaller in size

C) Divalent positively charged

D) Small and divalent positively charged

Q: A chemical system is sealed in a strong rigid container at room temperature and then heated vigorously. Change in work done during process is: (ETEA 2010)

A) Positive

B) Negative

C) Zero

D) Constant

Q: Hydration energy is the heat evolved or absorbed when: (ETEA 2011)

A) One mole of gaseous ions is dissolved in one mole of water

B) One mole of ions in solid state is dissolved in one mole of water

C) One mole of gaseous ions is dissolved in water to give infinitely dilute solution

D) One mole of ions in solid state is dissolved to form concentrated solution

Q: Which one is spontaneous chemical reaction? (ETEA 2012)

A) Zn + Cu²⁺ → Zn²⁺ + Cu

B) Zn²⁺ + Cu → Cu²⁺ + Zn

C) 2 Fe(OH)₃ → 2 Fe + 3/2 O₂ + 3 H₂O

D) 2 NaCl → 2 Na + Cl₂

Q: The enthalpy of the elements at 1 atm pressure and 298 K is arbitrarily given the value of: (ETEA 2012)

A) 0.7

B) 29.8

C) Zero

D) Zero

Q: The standard molar enthalpy of formation is denoted by: (ETEA 2012)

A) H

B) H°

C) H₂₉°

D) H₉°

Q: Select the correct statement about lattice energy: (ETEA 2012)

A) The energy absorbed when 1 mole of ionic crystal lattice is formed from its constituent ions in gaseous state

B) The energy liberated when 1 mole of an ionic crystal lattice is formed from its constituent ions in gaseous state

C) The energy liberated when 1 mole of an ionic crystal lattice is split into its constituent ions in gaseous state

D) None of the above

Q: Choose the correct statement about Born Haber cycle: (ETEA 2012)

A) Born Haber cycle is a process for applying Hess's law to the standard enthalpy changes in the formation of covalent compounds

B) Born Haber cycle is a process for applying Hess's law to the standard enthalpy changes in the formation of ionic compound

C) Born Haber cycle is a process for applying Hess's law to the standard enthalpy changes in the formation of ionic and covalent compounds

D) None

Q: Which one of the following is not a state function? (ETEA 2013)

A) Enthalpy

B) Free energy

C) Work

D) Energy

Q: The first law of thermodynamics has a statement which implies that: (ETEA 2013)

A) No heat enters or leaves the system

B) The temperature remains constant

C) All work is mechanical

D) Energy is conserved

Q: The change in enthalpy at constant pressure ΔH is equal: (ETEA 2013)

A) ΔH=q+PΔV

B) ΔH=qᵨ=ΔE-PΔV

C) ΔH=ΔE+PΔV

D) ΔH=q-PΔV

Q: Providing heat for the following reaction causes it shift to the right: CO₂(g) + 2 H₂O(l) → CH₄(g) + 2 O₂(g). The reaction can therefore be described as: (ETEA 2014)

A) Spontaneous

B) Adiabatic

C) Endothermic

D) Exothermic

Q: Which one is not used in calculating the lattice energy of crystalline solids? (ETEA 2014)

A) Haber process

B) Born Haber cycle

C) Hess's law

D) Enthalpy changes

Q: First law of thermodynamics is expressed as: (ETEA 2015)

A) q=E+W

B) ΔE=q-W

C) q=E-PΔV

D) All

Q: Which of the following is not a state? (ETEA 2015)

A) Work

B) Internal energy

C) Entropy

D) Pressure

Q: For which of the following standard heat of formation is not zero? (ETEA 2016)

A) Cl₂₍g₎

B) Na₍s₎

C) Br₂₍g₎

D) Hg₍₁₎

Q: Students were decomposing CaCO₃ placed in a China dish by heating using burner in the laboratory. The 'system' in this experiment is: (ETEA 2016)

A) China dish

B) Burner

C) Laboratory

D) CaCO₃

Q: Neutralization is always an exothermic phenomenon. Which neutralization reaction below evolves more heat? (ETEA 2018)

A) NaOH + HClO₄(aq)

B) KOH + HNO₃(aq)

C) NaOH + H₂SO₄(aq)

D) All evolve same heat

Q: The first law of thermodynamics is a statement which implies that: (ETEA 2018)

A) No heat enters or leaves the system

B) The temperature remains constant

C) All work is mechanical

D) Energy is conserved