Question # 1

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

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Hoffmann's bromamide reaction

Hoffmann's methylation

Gabriel phthalimide reaction

H.V.Z reaction

Metals which are above SHE in electrochemical series

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Can liberate H₂from acid

Cannot liberate H₂from acid

Cannot always liberate H₂from acid

None of these

The branch of chemistry which deals with thermal energy changes in chemical reactions is called

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Chemical kinetic

Thermodynamics

Thermochemistry

Mechanics

Which one of the following in mainly responsible for depletion of ozone layer?

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Methane

Carbon dioxide

Water

chloroflurocarbons

The change in heat energy at constant temperature is called

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Enthalpy change

Heat of vaporisation

Bond energy

Internal energy change

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Cane sugar is not soluble in benzene but soluble in water because

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Cane sugar is a macro molecule

Cane sugar is an ionic compound

Can sugar has hydrogen bonding

Can sugar is an organic molecule

Phenol gives ---------- Colour with neutral FeCl₃solution

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Violet

Green

Red

Blue

Aldehydes can be distinguished from ketones by

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2,4-DNPH test

NaHSO₃test

N₂H₄test

Tollen's test

Solvent extraction is an equilibrium process and it is controlled by :

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law of mass action.

the amount of solvent used.

distribution law.

the amount of solute.

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

What are alloys

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A homogenous mixture of two or more elements

A homohenous mixture of metal and a non-metal

A homogenous mixture of two or more metals

None of the above

1-butene an 2-butene are an example of

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Chian isomerism

Positional isomerism

Metamerism

Functional group isomerism

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Elements in which f-orbitals are in the process of completion are called

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Outer transition element

Inner transition elements

Non-tranistion elements

Radioactive elements

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

The compounds which have any atom other than Carbon atom, in rings are called as

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Monocyclic

Heterocyclic

Homocyclic

None of the above

As it passes into food chain, the concentration of DDT

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Remains same

Decreases

Increases

Unpredictable

Quality of fuel is judged from its octane number. The best fuels are

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Straight chain hydrocarbons

Branched chain hydrocarbons

Cyclic compounds

Compounds containing benzene ring

Soft drinks and baby feeding bottles are generally made up of

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Polyester

Polyurethane

Polyurea

Polystyrene

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Which one of the following has continuous solubility curve

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NH₄NO₃

CaCI

CaCI₂. 6H₂O

Na₂SO₄. 10H₂O

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

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46

78

110

180

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

Identify the compound formed, when ethylene combines with water in the presence of 10% sulphuric acid and HgSO₄as catalyst

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Carbinol

Methanol

Ethanol

Glycol

A solution has 92 g of ethyl alcohol, 96 g of methyl alcohol and 90 g of water. Mole percentage of ethyl alcohol in the solution is

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10

20

25

50

Acetic Acid is obtained from:

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Red out

Vinegar

Butter

Milk

Which of the following is the hardest metal among following

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Li

Na

Rb

K

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

Matter is defined as any thing which occupies space and:

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Molecules

Mass

Compound

Molecules

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