Question # 1

The structure of a polymer depends upon how the monomer-repeating unit joins to makes a polymer, What is not the type of structure of a polymer?

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synthetic polymer

linear polymer

branched

cross linked or inter connected polymer

Benzene cannot undergo the ------- directly

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

Reaction kinetics is important to discover the---under which reaction will proceed most economically:

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rate constant

Conditions

volume

equilibrium point

The cause of deviation form ideal behaviour is because

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the actual volume of gas molecules is not negligible

there is force of attraction between molecules of a gas

both a and b

none of these

When two ice cubes are pressed together they unite to form one cube. which of the following forces is responsible for holding them together?

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H-bonding

Covalent bonding

van der waal's forces

dipole-dipole interaction

What is not true about DNA?

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it preserves genetic information

Synthesizes protein

it has a linear structure

To replicates

Which of the following elements is most metallic

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Bi

sb

As

P

Glucose and gulose are ____ for each other

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Geometrical isomers

Metamers

Apimers

None

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

The existence of an element in more than one form is called

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allotropy

isomorphism

polymorphism

isotropy

Which of these polymers is a synthetic polymer?

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animal fat

starch

cellulose

polyester

The forces of attraction between the solid atoms of helium are

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hydrogen boding

coordinate covalent bond

covalent bond

London dispersion force

Under which condition CO has the maximum molar volume.

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high T and P

Low T and High p

high T and low pressure

Low T and low P

Polysaccharides are

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Polyester

Polyamides

Poly ethers

Polynucleotide

Which of the following compounds will react with reagent ?

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CH₃ CO H

CH₃ CO CH₃

CH_{3 COOH}

CH₃CO CH₂CH₃

N₂ + 3H₂ ⇌2NH₃

The unit of K_c for tis reaction will be:

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mol² dm^-6

mol^-2 dm⁺⁶

mol dm^-3

mol^-1 dm⁺³

Electrochemistry is concerned with the conversion of electrical energy into chemical energy in :

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Galvanic cell

Electrolytic cell

Voltaic cell

Both (a) and (c)

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

The valency, ionization energy and electrongativity of elements are related to its

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Atomic number

Properties

Atomic weight

Family group

With the progressive of the reaction the slope of the curve between concentration of product and time

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Gradually becomes more steep

Gradually becomes less steep

No change occurs in slope

None of these occurs

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Condensation

Dehydration

Dehydrogenation

Hydrogenation

Electronegativity order of alkyl halides is:

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Rl > RBr > RCl > RF

Rbr > RCl > RF >Rl

RCl > RF >Rl > RBr

RF >Ri > RBr >RII

The reactivity order of alkyl halides for a paricular alkyl group is

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Fluoride > chloride > bromide > iodide

Chloride > bromide > fluoride > iodide

Iodide > bromide > chloride > fluoride

Bromide > iodide > chloride > fluoride

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:

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Fibre

Plastic

Vanish

Polyamide resin

Which compound shows more hydrogen bonding?

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C₂H₆

C₂H₅Cl

CH₃----O----CH₃

C₂H₅OH

A carboxylic acid with one caboxyl group:

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Monocarboxylic acid

Dicarboxylic acid

Tricarboxylic acid

Polycarboxylic acid

Which reagent is used to reduce a carboxylic group to an alcohol

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H₂/Ni

H₂/Pt

NaBH₄

LiAIH₄

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2

3

4

9

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