Free MCQs & Online Quiz Practice for Exams

Q: The energy change in a closed cycle from initial to final state is zero. This statement is obeyed by: (ETEA 2018)

A) Born Haber cycle

B) Law of conservation of energy

C) First law of thermodynamics

D) All of the above

Q: The amount of heat required to raise the temperature of 10 moles of water from 70 K to 80 K (molar heat capacity of water is 75.24 J) is: (ETEA 2018)

A) 0.7529 J

B) 7524 J

C) 95.24 J

D) 752.4 J

Q: Which one of the following is not a state function? (ETEA 2019)

A) Work

B) Enthalpy

C) Internal energy

D) Pressure

Q: Which one is not an endothermic process? (ETEA 2019)

A) Atomization of I₂

B) Electrolysis of water

C) Condensation of vapours

D) Both (a) & (c)

Q: The emf of a galvanic cell can be calculated from: (ETEA 2007)

A) The size of the electrode

B) The pH of the solution

C) The amount of metal in the anode

D) The E values of the half cell

Q: The oxidation number of Cl in Ca(ClO₃)₂: (ETEA 2007)

A) -2

B) +3

C) +5

D) -6

Q: Which of the following cannot be displaced from their salt solution by copper? (ETEA 2008)

A) Ag

B) Au

C) Pt

D) Zn

Q: Lithium is generally used as an electrode in high energy density batteries, because: (ETEA 2008)

A) It is the lightest metal

B) It has high negative reduction potential

C) It is quite reactive

D) It does not corrode easily

Q: The stronger the reduction potential the more difficult it is to: (ETEA 2009)

A) Oxidize the compound

B) Reduce the compound

C) Electrolyze the compound

D) None of the above

Q: Which statement is correct? (ETEA 2009)

A) Standard hydrogen electrode (SHE) always acts as anode

B) SHE may act as cathode or anode depending upon the reduction of the counterpart

C) SHE always acts as cathode in voltaic cells

D) None

Q: If we pass current through the sucrose solution the galvanometer will not show any deflection because sucrose molecules: (ETEA 2010)

A) Move towards cathode

B) Move towards anode

C) React with water

D) Remain neutral

Q: Which of the following is not considered to be an oxidizing agent? (ETEA 2010)

A) MnO₂

B) Cl₂

C) NaOH

D) Na₂O₂

Q: What will happen if a block of copper metal is dropped into a beaker containing a solution of 1M FeSO₄? (ETEA 2011)

A) Copper will dissolve with no other change

B) Copper will dissolve and Fe will be precipitated

C) Copper will dissolve with evolution of H₂ gas

D) No reaction will occur

Q: The best known and the most highly developed fuel cell is the hydrogen/oxygen fuel cell. This is known as: (ETEA 2012)

A) Proton exchange membrane cell

B) Bacon cell

C) Regenerative cell

D) None of the above

Q: Select the strongest reducing agent: (ETEA 2012)

A) Cl⁻

B) Ne

C) Na⁺

D) Ca²⁺

Q: What will happen if a block of copper is dropped into a beaker containing 1M ZnSO₄? (ETEA 2013)

A) Copper will dissolve with no other change

B) Copper will dissolve and zinc metal will be deposited

C) Copper will dissolve with evolution of H₂ gas

D) No reaction will occur

Q: Which statement given below is not true for the reaction Fe³⁺ + e⁻ → Fe²⁺? (ETEA 2013)

A) Fe³⁺ is being reduced

B) The oxidation state of Fe has changed

C) Fe³⁺ could be referred to as a reducing agent in this reaction

D) Both Fe³⁺ and Fe²⁺ are called cations

Q: Considering the standard reducing chart, the strong reducing agent value is: (ETEA 2013)

A) Small negative values

B) Large negative values

C) Small positive values

D) Large positive values

Q: The two half-cell reactions involved in the discharge of a lead storage battery. The potential of single cell lead storage is: (i) PbSO₄ + 2e → Pb + SO₄⁻² -(0.36V) (ii) PbO₂ + 4H⁺ + SO₄⁻² + 2e → PbSO₄ + 1.69V (ETEA 2013)

A) 1.33V

B) 4.10V

C) 2.66V

D) 2.06V

Q: Which statement is correct while recharging the automobile battery? (ETEA 2013)

A) Pb is converted to PbO₂

B) PbSO₄ is converted to Pb

C) Pb is converted to PbSO₄

D) None