Question # 1

Which woody raw material is used of the manufacture of paper pulp?

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cotton

bagasse

poplar

rice straw

Ozone layer is present in

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Troposphere

Stratosphere

Mesosphere

Ionosphere

Choose the example having hexagonal system:

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graphite

sugar

sulphur

diamond

Iodine value of an oil or fat may be defined as

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the number of grams of iodine taken up by 1 g of the oil or fat

the number of grams if iodine taken by 10 g of the oil or fat

the number of grams of iodine taken by 100 g of the oil or fat

none of the above

All are examples of different classes of enzymes except

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Hydrolases

Isomerases

Oxido-reductases

Mutases

Total pressure of mixture of two gases is:

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The ratio of their partial pressure

The product of their partial pressure

The difference partial pressure

The sum of their partial pressure

Molecular ions are produced in mass spectrometer. Which type of molecular ion formed more abundantly.

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Negatively charged

H⁺ ions

Positively charged

equal positive and negative ions

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

By increasing the concentration of reactants, the rate of reaction

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Decreases

Increases

Remains constant

Not predicted

Group VIB of transition elements contains

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Zn. Cd. Hg

Cr. Mo, w

Fe. Ru, Os

Mn. Te. Re

The substance used in the soil to provide element.Which are essential for plant growth are known as:

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manures

fertilizers

pesticides

additive

When an electron is absorbed in an empty or partially filled orbital of an atom, the energy released is called

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Ionization energy

Potential energy

Electron affinity

Bond energy

Natural fertilizers are materials derived from

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Plants only

Animals only

Both plants and animals

None of these

The toxic organic compounds and heavy metals and metalloids results in contamination of

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Surface water

Ground water

Both surface and ground water

Neither surface nor ground waters

Which of the following compounds will react with Tollen's reagent

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Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

A polymer may be

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Homopolemer

Co-polymer

Terpolymer

All of these

Acetamide and NaOBr/OH^-produce

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Ethanamine

Methanamide

CH₃CN

NH₃

(CH₂O)_nis general formula for

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Monosaccharides

Oiligosaccharides

Polysaccharides

None of these

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

Common names of aldehydes are given by corresponding:

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Ketone

Alcohol

Carboxylic acid

ester

Which of the following salt is used as purgative

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CaSO₄

MgSO₄

BeSO₄

NaCl

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