Electrochemistr...

Only One Option Correct Type

This section contains 17 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct

Q.

In corrosion of iron

Select the correct statement(s).

"Maintenance-free" batteries now in use in place of commom batteries ,have

In the following batteries, alkaline electrolytes are used

I. Mercury
II. Nickel-cadmium
III. Modified Leclanche cell Cell potential is found to be independent of [OH^-] in

Following are certain facts about batteries.
I. They are classified as primary, secondary and flow batteries.
II. Leclanche cell is a primary battery.
III. Lead-acid (storage) battery is a secondary cell.

Select the correct facts.

In an atmosphere with industrial smog, copper corrodes to a basic sulphate (and also to a basic carbonate).This basic sulphate is 

In which of the following,reactants are not contained with the cell but are continuously supplied from the external source?

When a buried pipeline is protected from corrosion by connecting to Mg block ,It is known as

The rate of corrosion is more in the environment which is 

During galvanic corrosion, the more noble metal acts as

Some or more factors/species can affect corrosion.
I. Temperature

II. pH

III. Impurity of metal

IV. Conc. HNO₃

Select the correct factors/species.

When a lead storage battery is discharged.

Select the correct statement(s) about corrosion.

Rusting of iron or corrosion of active metal is initiated by

Rusting of iron takes place in

The non-chromium redox battery makes use of the reaction

 Thus, cell diagram is  

Some statement(s) about dry-cell batteries are

I. Anode is a zinc metal and cathode is inert graphite in a paste of MnO₂ and C-black.
II. Electrolyte is a moist paste of NH₄CI and ZnCI₂.
III. Oxidation product is Zn²⁺ and reduction product is Mn₂O₃.

Select the correct statement(s).