Telfon (PTFE) is corroded by

The repeating units of PTFE are

A

Cl₂CH = CH₃

B

F₂C = CF₂

C

F₃C = CF₃

D

FClC = CF₂

Poly tetra flouro ethylene (PTFE) is known as

A

Dacron

B

Teflon

C

Bakelite

D

Celluloid

Find out which quotation parts of the following sentences has an error. In recent 'years', automobile emissions 'have disfigured' stone 'carvings', corroded bronze monuments, and 'soil' ancient buildings.

A

years

B

have disfigured

C

carving

D

soil

Rubber lined vessels are corroded by the action of

A

Aqua regia

B

Chloroform

C

Sulphuric acid (95%)

D

All of the above

Silver gets corroded due to ________ in air.

A

Oxygen

B

Hydrogen Sulphide

C

Carbon dioxide

D

Nitrogen

Gunmetal and bronze are not corroded by the action of

A

Wet chlorine

B

Synthetic detergent solution

C

Hydrochloric acid (10%)

D

Nitric acid (

Polythene (low or high density) containers are not corroded by

A

Sulphuric acid (10%) at room temperature

B

Nitric acid (95%) at room temperature

C

Sulphur trioxide at 60°C

D

Any of these

Glass is corroded by

A

Fluorine (dry or wet)

B

Sulphuric acid

C

Phosphoric acid

D

None of these

Graphite is corroded by

A

Sulphuric acid (10%)

B

Sea water

C

Hydrochloric acid

D

None of these

Stainless steel is not corroded by

A

Hydrochloric acid (10%)

B

Nitric acid (10%)

C

Sulphuric acid (10%)

D

Saturated brine

Telfon (PTFE) is corroded by

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