The standard EMF of the cell Pt, H₂(g) | HCl(soln.) | AgCl(s), Ag(s)

Q29 · CSIR-NET Chemistry, December 2015

Paper: CSIR-NET December 2015 · Subject: Physical Chemistry · Chapter: Electrochemistry · Topic: Nernst Cells · Marks: 2 · Difficulty: Easy

The standard EMF of the cell $\mathrm{Pt,\ H_2(g)\,|\,HCl(soln.)\,|\,AgCl(s),\ Ag(s)}$

(a)increases with T

(b)decreases with T

(c)remains unchanged with T

(d)decreases with $[\mathrm{HCl}]$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

ΔS° of H₂ + 2AgCl → 2Ag + 2HCl(aq) is negative, so dE°/dT = ΔS°/nF < 0 — E° decreases with T (b).

Study loop for Electrochemistry