Electrochemistry | Past Year Paper Chemistry MCQs | mosaicbro.com

Electrochemistry | Past Year Paper Chemistry MCQs

7 of 29 questions (Page 2 of 5)

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8 Nelson's cell and Down's cell are examples of:
Correct Answer: C
Explanation: Both are electrolytic cells used for NaOH and Na production respectively.
9 The oxidation number of Cr in K₂Cr₂O₇ is:
Correct Answer: C
Explanation: 2(+1) + 2x + 7(-2) = 0 ⇒ x = +6 for Cr.
10 The electrolyte used in fuel cell is:
Correct Answer: C
Explanation: Alkaline fuel cells use KOH electrolyte.
11 Which one is not an electrolyte?
Correct Answer: C
Explanation: Solid metals conduct but don't undergo electrolysis (not electrolytes).
12 Oxidation state of Mn in MnO₄²⁻ is:
Correct Answer: B
Explanation: x + 4(-2) = -2 ⇒ x = +6 for Mn.
13 In H₂O₂, the oxidation state of oxygen is:
Correct Answer: B
Explanation: Peroxides have oxygen in -1 state.
14 Electrode potential of SHE is arbitrarily taken as:
Correct Answer: A
Explanation: Standard Hydrogen Electrode (SHE) is the reference at 0.00 V.
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