Question # 1

The substitution of a'-H' by '-NO2' group in benzene is called

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Nitration

Sulphonation

Ammunolusis

Reduction of benzene

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

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NO₂

SO₂

Hg

Pb

Aspartic acid is a (an)

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Monoamino dicarboxylic acid

Diamino Monocarboxylic acid

Aromatic amino acid

Imino acid

At higher temperature isotherm moves away from y-axis because of increase in

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Pressure

Number of moles

Volume

Mass

Haemoglobin molecule is how many times heavier than helium atom

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68000 times

17000 times

,34000 times

, 1700 times

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

Which one is an isomorphic pair?

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NaNO3, CaCO3,

NaF, MgO

K2SO4 ,K2Cr2O7

Zn, Cd

Aromatic carboxylic acids have corboxyl group attached to group:

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Alkyl group

Aryl group

Phenyl group

Benzyl group

The addition of HCI to ethene gives?

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Chloroethane

1,2-dichloroethane

1.1-dichloroethane

2-chloroethane

One of the following metals is the most reactive and form super oxide. Indicate that

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Mg

K

Be

Li

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

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Maltase

Zymase

Diatase

Invertase

Self linkage of carbon to produce long chains

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isomerism

Polymorphism

Polymerization

Catenation

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Hear of reaction

Heat of formation

Heat of neutralization

Heat of combustion

Which enzyme is not involved in fermentation of strach

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Diastase

Zymase

Urease

Invertase

Which is made by coordinate covalent bond

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H₃O⁺

H₂O

CH₄

HCl

Which of the following metal requires radiation of highest frequency to cause emission of electrons?

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Na

Mg

K

Ca

Orbital having same energy is called:

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Hybrid orbital.

Valence orbital.

Degenerate orbital.

D-orbital.

Alkyl halides on treatment with aqueous KOH give

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Phenol

Alcohol

Aldehyde

Ketone

Which is a weak nucleophile

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OH^-

Br^-

NH₃

CI^-

Which polymerization is free radical machanism based

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Addition

Condensation

Both a and b

None

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

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