A. From waste sulphite substrate of paper mills

B. By Esterification and hydrolysis of ethylene

C. From molasses

D. None of these

A. Hard

B. Soft

C. Metallic

D. Lubricating

A. Ammonia

B. Limestone

C. Nitric acid

D. None of these

A. Transparent soaps are made by cold process

B. Organic pigments are used as colouring materials in the soap manufacture

C. Both laundry as well as toilet soaps are manufactured by hot process

D. Colourless rosin is used in the manufacture of laundry soaps

A. Prevent redeposition of soil on cleaned surface

B. Act as optical brightening agent

C. Inhibit corrosion in washing machines made of aluminium

D. None of these

A. It is very corrosive at elevated temperature

B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)

C. It decomposes on further increasing the temperature

D. None of these

A. Addition of soda ash to it

B. Treating it with zeolites

C. Passing it through sodium hexametaphosphate

D. All (A), (B), and (C)

A. Catalytic dehydrogenation of ethyl benzene

B. Dehydration of ethyl alcohol followed by hydrogenation

C. Reacting ethylene oxide with acetaldehyde

D. Fermentation of starch

A. Polyester

B. Unsaturated polyester

C. Polyamide

D. Inorganic polymer

A. Lauric acid

B. Palmitic acid

C. Stearic acid

D. Oleic acid

A. Phosphate rock with phosphoric acid

B. Phosphate rock with sulphuric acid

C. Phosphate rock with nitric acid

D. Ammonium phosphate with phosphoric acid

A. In making PVC

B. As plasticisers

C. In insecticides manufacture

D. For making nylon-6

A. Palmitic

B. Oleic

C. Stearic

D. Oxalic

A. Remove double bonds

B. Raise its melting point

C. Improve its resistance to oxidation

D. None of these

A. Insecticides

B. Analgesic drug

C. Fire retardant

D. Hydrogenation catalyst

A. It does not react with water

B. It is poisonous

C. Its kindling temperature in dry air is very low

D. It is unstable

A. Adjust the pH of the syrup

B. Remove the coloring matter from the syrup

C. Reduce the viscosity of the syrup

D. Improve the rate of crystallisation of sugar

A. Remove residual turbidity

B. Reduce the bacterial load on filter

C. Control taste and odour

D. Remove chlorinous taste

A. Pigment

B. Thinner

C. Dryer

D. Anti-skimming agent

A. Boiling

B. Adding Ca(OH)₂

C. Boiling it with Na₂CO₃

D. None of these

A. SO₃

B. H₂SO₄

C. H₂SO₃

D. SO₂

A. Impart flexibility

B. Improve workability during fabrication

C. Develop new improved properties not present in the original resins

D. All (A), (B) and (C)

A. 20% oleum

B. 65% oleum

C. 78% H₂SO₄

D. 98% H₂SO₄

A. Require lower initial investment

B. Require more power

C. Produce lower concentration NaOH

D. None of these

A. C₆H₆Cl₆

B. C₆Cl₆

C. C₆H₅Cl

D. C₆H₄Cl₂

A. Reduction

B. Roasting

C. Calcination

D. Smelting

A. Cold lime process

B. Coagulation

C. Hot-lime soda process

D. Sequestration

A. Quartz

B. Galena

C. Siderite

D. Chalcopyrite

A. Kraft method of pulp manufacture can process all types of fibrous raw materials

B. Digestion time for bagasse is less than that for wood base materials

C. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method

D. None of these

A. Washing soda

B. Soda ash

C. Plaster of Paris

D. Calcite

A. (NH₄)₂SO₄

B. NH₄Cl

C. (NH₄)₂ NO₃

D. Liquid NH₃