Question # 1

The element which exhibits maximum catenation property is

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C

Pb

Ge

Sn

Organic pollutants in water are measured by

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DO

COD

Water logging

PH

Ozone is present in layer around earth:

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atmosphere

tropospher

stratosphere

thermosphere

Relationship between volume of a gas and prevailing conditions of temperature and pressure are called

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Gas laws

Equilibrium laws

Rate laws

None of these

Aspartic acid is a (an)

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Monoamino dicarboxylic acid

Diamino Monocarboxylic acid

Aromatic amino acid

Imino acid

Which of the following represents peptide linkage

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-C=N-

-CO-NH-

-CH₂-NH-

-CH-NH-

Monomer for acrylic resins is

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Acrylic acid

Methylmethacrylate

Acryloritrile

All

Which if the following will have the same number of molecules at S.T.P?

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280cm³ of CO₂ and 280cm³ of N₂O

11.2dm³ of O₂and 32g of O₂

44g of CO₂and 11.2dm³ of CO

28g of N₂and 5.6dm³ of oxygen

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

One molecule of gas is approximately Distance______ times its own diameter from its neighbour at room temperature.

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30

3000

3

300

Usually the % of moisture in paper is:

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1---3%

6---8%

4---6%

5%

A system undergoes a change to attain the state of

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High energy

Low energy

Moderate energy

None of these

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

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Saran fibre

Nylon

Polyester

Acetate fibre

If the ionic product of a solution is less than the solubility product, the solution is

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Supersaturated

Unsaturated

Ideal

Saturated

Which is the longest period of the periodic table

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5th

7th

6th

2nd

During a chemical reaction heat may be

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absorbed

Evolved

Both evolved and absorbed

None of these

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Br_2(aq)

2, 4-dinitrophenylhydrazine

NaBH

Tollen's reagent

Objects of the size of an atom can be observed in

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An electron microscope

An x-ray spectrum

Atomic absorption spectrum

A visible spectrum

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

Across the lanthanide series, the basicity of the lanthanide hydroxides

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Increases

Decreases

First increases and then decreases

First decreases and then increases

1.1 mol of A is mixed with 2.2 mol of B and the mixture is kept in on litre flask till the equilibrium is reached. At equilibrium, 0.2 mol of C is formed. If the equilibrium reaction is A+2B 2C+D, the value of equilibrium constant is

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0.002

0.004

0.001

0.003

Which of the following reagent will react with both aldehyde and ketones?

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Grinard's reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

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