Redox & Electrochemistry — NEET Chemistry practice

Question 1

In a copper voltameter, m g of Cu is deposited in 30 s. The current rises linearly from 0 to 100 mA during 0–10 s, stays at 100 mA during 10–20 s, then rises linearly to 200 mA during 20–30 s. The electrochemical equivalent of Cu is:

Accepted Answer

m/3

Answer

m/4

Answer

m/63.5

Answer

m/2

Question 2

Match the redox terms (Column I) with Column II. Column I: Na(s) → Na⁺ + e⁻; Cl₂ + 2e⁻ → 2Cl⁻; Electron donor; Electron acceptor Column II: Oxidising agent; Reducing agent; Gain of electrons; Oxidation half-reaction

Accepted Answer

A→S, B→R, C→Q, D→P

Answer

A→S, B→Q, C→R, D→P

Answer

A→Q, B→S, C→P, D→R

Answer

A→R, B→S, C→Q, D→P

Question 3

A Fe²⁺ solution is titrated potentiometrically with Ce⁴⁺ (Fe²⁺ + Ce⁴⁺ → Fe³⁺ + Ce³⁺). When 80% of the Fe²⁺ has been titrated, the EMF of the system is: (E°(Fe³⁺/Fe²⁺) = 0.77 V; log 2 = 0.3, log 3 = 0.5, log 4 = 0.6)

Accepted Answer

0.806 V

Answer

0.532 V

Answer

0.734 V

Answer

0.756 V

Redox & Electrochemistry: NEET practice questions

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