Chemical Process MCQs

Question 1

Plasticisers are added to paints to

Accepted Answer

Give elasticity & prevent cracking of the film

Answer

Make it corrosion resistant

Answer

Make glossy surface

Answer

Increase atmospheric oxidation

Question 2

Pick out the correct statement.

Accepted Answer

All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms

Answer

A fat is converted into oil by its hydrogenation

Answer

There is no difference between a fat and an oil so far as its physical properties are concerned

Answer

Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content

Question 3

Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?

Accepted Answer

AgO

Answer

Al2O3

Answer

ZnCl2

Answer

FE2O3

Question 4

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

Accepted Answer

Reverse osmosis

Answer

Sand filter

Answer

Lime soda

Answer

Permutit

Question 5

Stereospecific agents are exemplified by

Accepted Answer

All of the above

Answer

Radiation

Answer

Supported metal oxide catalysts

Answer

Ziegler catalysts

Question 6

High purity nitrogen is used in

Accepted Answer

Both A & B

Answer

Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils

Answer

Fire fighting purposes

Answer

Neither A nor B

Question 7

Which of the following impurities in feed water for high pressure boiler is the most detrimental?

Accepted Answer

Silica

Answer

Dissolved oxygen

Answer

Suspended salt

Answer

Dissolved salt

Question 8

Essential oils are usually obtained using

Accepted Answer

Steam distillation

Answer

Extractive distillation

Answer

Solvent extraction

Answer

Leaching

Question 9

Cooking liquor in case of sulphite process is

Accepted Answer

Sodium sulphite and sodium bisulphite

Answer

Magnesium sulphite and free SO2 in acid medium

Answer

Magnesium sulphate and magnessium bicarbonate

Answer

None of these