Question # 1

Which is not an essential amino acid

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Leucine

Methionine

Histidine

Lysine

Glycogen on hydrolysis give

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Glucose

Lactose

Fructose

None

The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears.The behaviour is a characteristic of substance forming

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Allotropic crystal

Liquid crystals

Isomeric crystals

Isomorphous crystals

Which three element are needed for the health growth of plants:

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S,S,P

N,Ca,P

N,P,K

N,K,C

Per hydro cyclopentanone phenantherene is the basic structural of all the.

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Waxes

vitamins

proteins

steroids

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases?

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NO₂

SO₂

Hg

Pb

The major binding force of diamond,silicon and quartz is

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Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by

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10°

1°C

100°C

2°C

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

The substance upon which an enzyme acts is known as its

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domain

field

substrate

reactant

The ratio of diffusion of equal volume of He and SO₂is (molecular mass He = 4, SO₂= 64):

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1:4

16:1

1:16

4:1

Silver mirror test is applied for

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Aldehydes

Alcohols

Acids

Esters

Result of ozone hole is

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Green house effect

Global warming

Acid rain

UV rays reach the earth

A balloon contains 0.02 gram of H₂gas, it contains H₂molecules

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6.02 x 10²³

3.01 x 10²²

6.02 x 10²¹

3.01 x 10²¹

Which of the following brings about the conversion of starch into maltose

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Maltase

Zymase

Diatase

Invertase

Which of the following has highest dipole moment?

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NH₃

PH₃

AsH₃

SbH₃

Electron affinity of sulphur is

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More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

B-atom in BF₃has

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sp³hybridization

sp²hybridization

sp hybridization

no hybridization

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:

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Millikan.

J. Perrin.

Hittrof

J.J. Thomson.

Hydrogen gas and iodine vapours combine to form Hl at 425°C, the same composition of mixture is present if we start with decomposition of Hl. It suggests

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A static equilibrium

Law of mass action

A dynamic equlibrium

Irreversible reaction

A reaction is reversible because :

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Products are stable.

Reactants are reactive.

Products are reactive.

Reactants re stable.

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