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In a dry cell the depolarizer is :...

In a dry cell the depolarizer is :

A

`MnO_2`

B

`Zn`

C

Charcoal powder

D

`NH_4Cl`

Text Solution

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The correct Answer is:
A
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JMD PUBLICATION-ELECTRO CHEMISTRY-EXAMPLE
  1. The units of cell constant are: ohm^-1cm^-1, cm, ohm^-1cm, cm^-1

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  2. The units of conductivity are

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  3. In a dry cell the depolarizer is :

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  4. For one mole of electrolyte which of the following increases with dilu...

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  5. For a redox reaction to proceed in a cell, the e.m.f. must be:

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  6. Galvanised iron sheets are coated with: C, Cu, Zn, Ni.

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  7. Name the metal used in galvanisation of iron?

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  8. Copper sulphate solution cannot be stored in a vessel made up of: Zinc...

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  9. Which of the following statements is false?

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  10. for the electrorode reaction, M^(n+)(aq)+n e^(-)rarrM(s) Nernst equ...

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  11. The tendencies of the electrodes made up of Cu,Zn and Ag to release el...

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  12. Consider the following reactions: Zn(s)+cu^(2+)(aq)rarrZn^(2+) (aq)+...

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  13. In a galvanic cell, which one of the following statements is not corre...

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  14. E(cell) and triangleG^o are related as: triangleG^o=nFE^o, triangleG^o...

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  15. The S.I. units of molar conductivity are: S m^2mol^-2, S m mol^-1, Sm^...

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  16. The electrode potential of SHE is fixed as

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  17. In galvanisation, metal plating on iron to protect against corrosion ...

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  18. Which of the following statements is regarding rusting/corrosion?

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  19. Rust is mixture of:

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  20. In a galvanic cell cathode is positive electrode and anode is negative...

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