Practice Pakistan's most useful MCQs for competitive exams

Secondary cell is_____________________?

• (A)  rechargeable
• (B)  non rechargeable
• (C)  electrolytic cell
• (D)  Daniel cell

Answer

Submitted By :Ali Uppal

Greater value of standard reduction potential greater will be tendency__________________?

• (A)  to get oxidized
• (B)  to get reduced
• (C)  to accept electrons
• (D)  both B and C

Answer

Submitted By :Ali Uppal

The element that act as anode always have ______________ position in electrochemical cell?

• (A)  higher
• (B)  lower
• (C)  in middle
• (D)  no effect of position

Answer

Submitted By :Ali Uppal

Electrode potential of Zn is__________________?

• (A)  oxidation
• (B)  reduction
• (C)  oxidation-reduction
• (D)  depends on the nature of the coupled electrode

Answer

Submitted By :Ali Uppal

Potential of SHE is considered as__________________?

• (A)  zero
• (B)  unity
• (C)  constant
• (D)  multiple of 1

Answer

Submitted By :Ali Uppal

E0red of an element cab be calculated by comparing it with _____________________?

• (A)  New electrode of same element
• (B)  SHE
• (C)  1M solution of ions of respective element
• (D)  2M solution of HCI

Answer

Submitted By :Ali Uppal

Salt bridge transfers_______________?

• (A)  electrons
• (B)  anion
• (C)  current
• (D)  ions

Answer

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Right half cell contains _____________ electrode?

• (A)  A1
• (B)  Zn
• (C)  Cu
• (D)  Fe

Answer

Submitted By :Ali Uppal

Decrease in oxidation number is called__________________?

• (A)  oxidation
• (B)  reduction
• (C)  oxidation-reduction
• (D)  all of above represent same entity

Answer

Submitted By :Ali Uppal

Reaction at anode is called________________?

• (A)  oxidation
• (B)  reduction
• (C)  redox
• (D)  decomposition

Answer

Submitted By :Ali Uppal