In an electrochemical cell, polarization is caused by

A. Oxygen

B. Hydrogen

C. Tetraoxosulphate(IV) acid

D. Chlorine

The condition required for corrosion to take place is the presence of

A. Oxygen and Carbon (IV) oxide

B. Water and Oxygen

C. Water and Carbon (IV) oxide and Oxygen

D. Water and Carbon (IV) oxide

The enzyme used in the hydrolysis of starch to dextrin and maltose is

A. Zymase

B. Sucrase

C. Amylase

D. Lactase

In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through

A. Concentrated tetraoxosulphate (VI) acid

B. Anhydrous calcium chloride

C. Calcium oxide

D. Sodium hydroxide

The monomer of nylon is

A. Hydroxybenzene

B. Hexanedioic acid

C. Benzene -1,-4-dicarboxylic acid

D. Ethane-1,2-diol

The principle of column chromatography is based on th ability of the constituents to

A. React with the solvent in the column

B. React with each other in the solvent in the column

C. Dissolve in each other in the column

D. Move at different speeds in the column

Ammonium chloride can be separated from its mixture with common salt by

A. Distillation

B. Evaporation

C. Decantation

D. Sublimation

The ability of carbon to form long chains is referred to as

A. Alkylation

B. Acylation

C. Carbonation

D. Catenation

The industrial preparation of hydrogen gas from water gas is referred to as

A. Bosch process

B. Contact process

C. Haber process

D. Bayer Process

The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is

A. 6.2

B. 6.8

C. 7.1

D. 6.9