Question # 1

Correct order of intermolecular forces

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Gas < liquid < solid

Liquid < gas < solid

Gas < liquid < solid

Gas = liquid = solid

Newspaper can be recycled again and again by how many times?

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2

3

4

5

All of the following are aliphatic amino acids except

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Glycine

Alanine

Proline

Lysine

Leachate contains:

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fatty acids

Bacteria

Heavy metals

All of these

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

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maltase

zymase

diastase

invertase

Which is not the condition for the formation of smog

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there must be sufficient NO gas

there must be sunlight to help photo chemical reactions to take place

air must be blowing swifty

there must be SO₂in the air

The reaction takes place among the molecules when they have:

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Activation energy

Properly oriented

Concentrated

Activation energy and proper orientation

Ecosytem is a smaller unity of:

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nydosphere

biosphere

lithosphere

atmosphere

Common names of carboxylic acids are given by then:

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Source

Person discovered

Place

Habit

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

Major cause of SO2 on global scale is

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Volcanoes

Electric sparks

Combustion

All

Charge to mass ratio of electron was discovered by:

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Millika.

Rutherford.

J.J. Thomson.

Chadwick.

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

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as

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chesmistry

Geology

Physics

Mechanics

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

Which of the statements given below concerning properties of solution, describe a colligative effect?

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Boiling point of pure water decreases by the addition of ethanol

Vapour pressure of pure water decreases by the addition of nitric acid

Vapour pressure of pure benzene decreases by the addition of naphthalene

Boiling point of pure benzene increases by the addition of toluene

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

Automobiles

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

A solution of NaOH has pH = 13, then concentration of NaOH is

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10^-13M

10¹³M

10^-1M

10⁺¹M

Pollution is

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Removal of top soill

Release of toxic/undesirable materials in enevironment

Conversation of energy

All the above

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