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4

The combustion reaction, C + O2 = CO2, is

A. Exothermic

B. Endothermic

C. Autocatalytic

D. None of these

Correct Answer :

A. Exothermic


Related Questions

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4

Which of the following is not required in the manufacture of soda ash by Solvay process?

A. Ammonia

B. Limestone

C. Nitric acid

D. None of these

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4

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called

A. Polyurethane

B. Silicone

C. Teflon

D. Epoxy resin

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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

Yellow glycerine is made into white, using

A. Activated carbon

B. Diatomaceous earth

C. Bauxite

D. Bentonite

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4

Styrene butadiene rubber (SBR) is

A. A natural rubber

B. A synthetic polymer

C. A synthetic monomer

D. Another name of silicone rubber

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4

The difference between saponification value and acid value is

A. Called ester value

B. Always negative

C. Constant for all fatty oils

D. None of these

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4

Polymethyl methacrylate (PMMA) is known as

A. Bakelite

B. Teflon

C. Perspex

D. Nylon-6

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4

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

A. Increase the rate of absorption

B. Avoid corrosion

C. Reduce the cooling water circulation rate

D. None of these

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4

Varnish does not contain

A. Thinner

B. Pigment

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

Sulphuric acid completely saturated with sulphur trioxide is called

A. Concentrated sulphuric acid

B. Oleum

C. Sulphurous acid

D. Dilute sulphuric acid

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4

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

A. Cyclo trimethylene trinitramine

B. Trinitro resorcinol

C. Cyclo tetramethylene tetranitramine

D. Trinitrobenzene

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4

Use of hydrated lime in water treatment

A. Before filtration, reduces the bacterial load on filters

B. After filtration, combats the corrosiveness of water due to the presence of O2 & CO2

C. Is to adjust the pH value

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

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4

Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent.

A. 80

B. 90

C. 98

D. 100

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4

Sodium bisulphite is used for __________ water.

A. Deaeration

B. Dechlorination

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

Which of the following is used as a binding material in soap to improve soap texture?

A. Rosin

B. Borax

C. Benzyl acetate

D. Sodium carbonate

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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

Carborundum consists mainly of

A. Bauxite

B. Silicon carbide

C. Boron carbide

D. Calcium carbide

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4

The end bleaching agent used to move last traces of colour bodies from the pulp is

A. Chlorine dioxide (ClO2)

B. MgO

C. SO2 gas

D. Mercaptans

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4

Stereospecific agents are exemplified by

A. Radiation

B. Supported metal oxide catalysts

C. Ziegler catalysts

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

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4

In industrial nomenclature, alcohol means

A. Butyl alcohol

B. Propyl alcohol

C. Ethanol

D. Methyl alcohol

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4

Lithophane is

A. Explosive

B. White lead

C. Filter aid

D. ZnS (white pigment)

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4

Heating of __________ to 120°C, produces plaster of paris.

A. Blue vitriol

B. Gypsum

C. Calcium silicate

D. Calcium sulphate

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4

Na2CO3.10H2O is called

A. Washing soda

B. Soda ash

C. Slaked lime

D. Quicklime

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4

Lime and soda ash are added to water to remove

A. Bicarbonates & sulphates of calcium and magnesium

B. Undesirable taste and odour

C. Bacteria

D. Its corrosiveness

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4

Raw materials for 'Solvay Process' for manufacture of the soda ash are

A. Salt, limestone and coke or gas

B. Ammonia, salt and limestone

C. Ammonia limestone and coke

D. None of these

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4

Which of the following is a constituent of vinegar?

A. Around 10% alcohol

B. Around 1% acetic acid

C. Both (A) and (B)

D. Neither (A) nor (B)

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4

Insulin is an __________ drug.

A. Anti-malarial

B. Anti-TB

C. Antibiotic

D. None of these

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4

Systemic insecticides

A. Are absorbed throughout the plant

B. Kill insects following external bodily contact

C. Are stomach poisons

D. Emit poisonous vapour

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4

In the manufacture of viscose rayon, the raw material used industrially is

A. Eucalyptus wood

B. Bamboo

C. Bagasse

D. Fine teak wood

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4

Graphite is a/an

A. Electrical insulator

B. Allotrope of carbon

C. Moderator used in nuclear reactor

D. Both (B) and (C)