Question # 1

Thermoplastic polymer can be softened and hardened when cool repeatedly. Which one is not a thermoplastic among the following

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Epoxy resin

PVC

Plastic toys

None of all

If Kc value is small then equilibrium position will shift

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Towards left

Remains unchanged

Towards right

lt is always constant value

The maximum hydrogen bonding is in:

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diethyl ether

ethanol

water

benzene

A complete food contains at least:

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three nutrients

ten nutrients

six nutrients

eight nutrients

Addition of washing soda removes

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Softness of water

Temporary hardness of water

Permanent hardness of water

Hydrogen from water

Which of the following is not a heavy industry?

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Iron

Fertilize

Paper

None

Ethene can give all of the following reactions except

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Addition

Free radical substitution

Hydrohalogenation

Hydration

Amino acids ionize in water to form

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Zwitterion

Internal saH

Dipolar ion

All of these

Bond will be covalent when electronegativity difference of bonded atom is

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Equal to 1.7

between 0.5 to l.7

Greater to 1.7

zero

Amides are

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Strongly basic

Weakly basic

Acidic

Strongly

A molecule of polysacharide on hydrolysis produces __________of molecules of monosacharide,

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2 - 10

3

>10

2

Which of the following compounds gives trichoromethane on distilling with bleaching power?

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Methanal

Phenol

Ethanol

methanol

Heat,. work and internal energy of the system and surroundings are related into an equation which is called

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First law of thermodynamics

Hess's law

Henry's law

Born-haber cycle

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

SO₂Makes ______ acid rains

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Carbonic acid

Sulfuric

Nitric acid

All of these

The bibre which is composed of at least 85% by weight of acrylonitrile is known as

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Royan fibre

Azlon fibre

Saran binre

Acrylic fibre

Rates of organic reactions are

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Fast

Very fast

Slow

Non-reactive

DNA has deoxyribose, a base and the third component is

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Phosphoric acid

Ribose

Adenine

Thymine

Formula of chloroform is:

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

Besides Zn and Cu , German silver contains the metal

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Sn

Ag

Ni

Mg

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-76 KJ

-57 KJ

-171 KJ

-114 KJ

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