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4

Pick out the exothermic reaction out of the following:

A. C + H2O = CO + H2

B. CaC2 + H2O = Ca(OH)2 + C2H2

C. MgCO3 = MgO + CO2

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

Correct Answer :

B. CaC2 + H2O = Ca(OH)2 + C2H2


Related Questions

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4

Riboflavin is a/an

A. Vitamin

B. Analgesic drug

C. Anaesthetics

D. Anti-malarial drug

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4

Main constituent of limestone is

A. CaCO3

B. MgCO3

C. Na2CO3

D. CaSO4

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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

Phthalic anhydride is produced by the oxidation of

A. Naphthalene

B. Benzene

C. Toluene

D. Aniline

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4

Which of the following is not a product of coal tar distillation?

A. Anthracene

B. Creosote oil

C. Carbolic oil

D. None of these

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4

Salt is the basic raw material for the manufacture of

A. Cement

B. Glass

C. Potteries

D. Caustic soda

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4

The major use of butadiene is

A. As a plasticiser for unsaturated polyester

B. In the manufacture of synthetic rubber

C. As an anti-skinning agent in paint

D. None of these

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4

Raw materials used for producing __________ cement does not contain iron oxide.

A. Waterproof

B. Slag

C. White

D. Pozzolan

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4

__________ acid is an unsaturated fatty acid.

A. Palmitic

B. Oleic

C. Stearic

D. Oxalic

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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

Na2CO3.10H2O is called

A. Washing soda

B. Soda ash

C. Slaked lime

D. Quicklime

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4

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?

A. 500°C

B. 750°C

C. 1000°C

D. 1500°C

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4

Which of the following is not a pyrite ore?

A. Celestite

B. Galena

C. Gypsum

D. Siderite

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4

Which form of sulphur is the most stable at room temperature?

A. Plastic

B. Monoclinic

C. Rhombic

D. Flowers of sulphur

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4

Lindane is

A. Not a fumigant

B. BHC (Benzene Hexachloride) containing 99% γ-isomer

C. A by-product of BHC manufacture

D. Both (B) and (C)

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4

Sugar content in sugarcane on cane basis is about __________ percent by weight.

A. 1 to 5

B. 5 to 10

C. 15 to 20

D. 20 to 30

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4

Viscose rayon

A. Cannot be made from sulphite pulp

B. Utilises H2SO4, NaOH and CS2 during its manufacture

C. Cannot yield textile grade fibre

D. None of these

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4

The basic constituent of vegetable oils is

A. Triglyceride

B. Fatty acids

C. Fatty alcohol

D. Mono esters

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4

BHC (Benzene hexachloride) is made by the chlorination of benzene

A. Which is an addition reaction

B. Which is a substitution reaction

C. In absolute dark

D. In presence of sunlight

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4

Dense soda ash used in the manufacture of glass, is chemically represented by

A. Na2CO3

B. Na2CO3.10H2O

C. Na2CO3.H2O

D. Na2HCO3

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4

A good quality coal should have

A. Low fusion point of ash

B. High ash content

C. High sulphur content

D. None of these

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4

Enamels

A. Give good glossy finish

B. Are same as varnish

C. Are prepared from non-drying oil

D. Do not contain pigment

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4

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an

A. Explosive

B. Soap

C. Detergent

D. Analgesic drug

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4

Trinitro-toluene (TNT) is

A. Used in glycerine manufacture

B. An explosive

C. Used in dye manufacture

D. None of these

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4

The function of gypsum addition during cement making is to

A. Increase the density of cement

B. Decrease the cement setting rate

C. Both (A) and (B)

D. Neither (A) nor (B)

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4

CaCl(OCl) is the chemical formula of

A. Hypo

B. Bleaching powder

C. Plaster of Paris

D. Aqua regia

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4

Which of the following contains least amount of N2?

A. Coke oven gas

B. Blast furnace gas

C. Producer gas

D. Water gas (blue gas)

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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

Naphthols are derivates of

A. Methyl amine

B. Naphthalene

C. Phenol

D. Xylene

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4

Potassium is kept & transported under

A. Water

B. Liquid ammonia

C. Kerosene oil

D. Alcohol