Which of the following changes will increase the emf of cell ? Co(s) | CoCl 2 (M 1 ) ||…
Chemistry · JEE Advanced · NTA Exams — Electrochemistry
Which of the following changes will increase the emf of cell ?
Co(s) | CoCl2 (M1) || HCl (M2) | H2(g) (p1)| Pt(s)
Co(s) | CoCl2 (M1) || HCl (M2) | H2(g) (p1)| Pt(s)
- increase volume of CoCl2 solution from 500 ml to 1000 ml
- increase M2 from 0.1 to 0.5 M
- decrease pressure of H2(g) from 0.2 to 0.1 atm
- increase mass of cobalt electrode
Answer
(A) increase volume of CoCl 2 solution from 500 ml to 1000 ml, (B) increase M 2 from 0.1 to 0.5 M, (C) decrease pressure of H 2 (g) from 0.2 to 0.1 atm
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