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4

Sizing material is incorporated in paper to

A. Impart resistance to penetration by liquids

B. Increase its thickness

C. Increase its flexibility & opacity

D. Increase its brightness

Correct Answer :

A. Impart resistance to penetration by liquids


Related Questions

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Industrial production of chloroform requires acetone and

A. Phosgene

B. Calcium hypochlorite

C. Chlorine

D. Ammonium chloride

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Favourable conditions for the liquefaction of gases in general are

A. High pressure & low temperature

B. Low pressure & high temperature

C. High pressure & high temperature

D. Low pressure & low temperature

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4

Enzymes are organic catalysts used in the __________ reactions.

A. Chemical

B. Biochemical

C. Photochemical

D. Electrochemical

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4

__________ is produced using Polycondensation reaction.

A. Polythene

B. Phenol formaldehyde

C. Poly vinyl chloride

D. None of these

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4

Acetone is produced by catalytic dehydrogenation of

A. Phenol

B. Naphthalene

C. Isopropanol

D. Ethyl benzene

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4

Saponification number of an oil or fat

A. Gives an idea about its molecular weight

B. Is inversely proportional to its molecular weight

C. Detects its adulteration

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

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Phenolic antiseptics are added in the __________ soap.

A. Shaving

B. Medicated

C. Metallic

D. Transparent

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Which of the following has sodium bicarbonate as its main constituent?

A. Baking soda

B. Baking powder

C. Washing soda

D. None of these

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4

Hydrophilic group of a soap or detergent solution is

A. Water hating

B. Soil loving

C. Water loving

D. None of these

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4

Which of the following is a detergent?

A. Benzene hexachloride

B. Alkyl benzene sulphonate

C. Polytetrafluoroethylene

D. Cellulose nitrate

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4

Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.

A. 10

B. 25

C. 50

D. 98

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4

Diaphragm electrolytic cell as compared to mercury electrolytic cell

A. Produces 70% NaOH solution

B. Requires less specific power consumption for the production of chlorine

C. Requires lesser investment for similar capacity

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

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4

The most reactive allotropic form of phosphorus is __________ phosphorus.

A. Red

B. Yellow

C. Violet

D. Black

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4

Catalyst used during the manufacture of 'Vanaspati Ghee' is

A. Zinc

B. Nickel

C. Platinum

D. Copper

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4

Ore concentration by froth floatation utilises the __________ of ore particles.

A. Density difference

B. Wetting characteristics

C. Terminal velocities

D. None of these

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4

Na2CO3 is called

A. Washing soda

B. Soda ash

C. Plaster of Paris

D. Calcite

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4

Which of the following is used as a coagulant in water treatment?

A. Chloramine

B. Chlorine

C. Ferrous sulphate

D. Hydrogen peroxide

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4

Ca(OH)2 is called

A. Quicklime

B. Slaked lime

C. Limestone

D. Gypsum

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4

White phosphorous is stored under water, because

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

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4

Solvay process is used for the manufacture of

A. Caustic soda

B. Soda ash

C. Caustic potash

D. Soda lime

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4

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

A. Silica

B. Dissolved oxygen

C. Suspended salt

D. Dissolved salt

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4

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is

A. Alumina

B. Silica gel

C. Platinum

D. Nickel

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4

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

A. 1

B. 2.5

C. 5

D. 10

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4

Fusion of bauxite and __________ produces high alumina cement.

A. Alum

B. Limestone

C. Coke

D. Quartz

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4

Extraction of __________ employs an electrolytic process.

A. Aluminium

B. Silver

C. Copper

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

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4

Penicillin is separated from fermented broth by

A. Extraction with amyl or butyl acetate

B. Ternary Azeotropic distillation

C. Evaporator in calandria

D. Extractive distillation

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4

Tall oil obtained as a by-product from the black liquor recovery is

A. A black, sticky & viscous liquid

B. Used in the manufacture of greases, emulsions & soaps

C. Composed mainly of rosin & fatty acids

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

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4

Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is

A. 0.14

B. 0.34

C. 0.94

D. 1.4

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4

Potassium is kept & transported under

A. Water

B. Liquid ammonia

C. Kerosene oil

D. Alcohol

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

A. AgO

B. Al2O3

C. ZnCl2

D. Fe2O3