Question # 1

Which is not a calcarious material.

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Lime

Clay

Marble

Marine shell

The nitrogen present in some fertilizers helps plants

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to fight against diseases

to produce fat

to undergo photosynthesis

to produce protien

Ammonia is prepared industrially by

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Contact process

Ostwald process

Birkland Eyed process

Heber process

Which substance is used ot bleach the pulp.

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Na2SO3

NaCl

NaClO

NaOH

Which one is not an argillaceous material.

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Clay

Shale

State

Gypsum

Which one of the following raw materials is not present in the cement.

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Lime stone

Gypsum

Blast furnace slag

Red lead

The macronutrients are required in quantities ranging from

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4-40 kg per acre

10-100 kg per acre

5-100 kg per acre

5-200 kg per acre

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

During manufacturing of cement , the temperature of pre heating zone is.

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500 ^oC

900^oC

1000^oC

1500^oC

Prilling is a process in which

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Concentration of urea is increased

Water is removed from urea

Molten urea is converted to solid drop

Some other ingredients are added to urea

Which one of the followings is woody raw material used for making pulp and paper

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Eucalyptus

Wheat straw

Bagasse

Cotton linter

In Pakistan pulp is usually bleached with Cl2. The residual chlorine is removed from pulp by an antichlor which is

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dil HCl

dil NaOH

Water

NaCl

Cement is a mixture of

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Clay and clinker

Clay, lime stone and gypsum

Lime stone and gypsum

Lime stone and clay

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Conversion of ammonium carbamate into urea is

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Hydrolysis

Hydrogenation

Hydration

Dehydration

Which three elements are needed for the healthy growth of plants.

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N,S,P

N, Ca, P

N,P,K

N,K,C

The composition mixture of clay and lime stone in the raw material.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

55% lime stone and 15% clay

Which woody raw material is used for the manufacture of paper pulp.

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Cotton

Bagasse

Poplar

Rice straw

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