Question # 1

Formation of PVC form vinyl chloride is an example of

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substitution reaction

addition polymerization

condensational reaction

Aldol condensation

The fertilizer contains 33___35%n is:

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ammonium nitrate

potassium nitrate

urea

ammonia

Which of the following may be called London dispersion forces

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dipole-dipole forces

ion-dipole forces

dipole-induced dipole forces

instantaneous dipole-induced dipole forces

Naturally occuring lipids are called

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Fats

Protein

Steroids

None

On adding NH3 to water

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lonic product will increase

[H3O+] will inerease

lonic product will decrease

[H3O+] will decrease

The order of reactivitv of alksI halides towards nucleophile is

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RI>RBr RF>RCI

RF>RCI>RBr>RI

RI>RBr> RCI>RE

RF>RBr>RCI>RI

At constant temperature, volume of given mass of gas in inversely proportional to pressure on it. This statement is according to:

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Hook's law

Graham's law

Bolye's law

Charle's law

Higher the surface area available for reaction

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slower the reaction

faster the reaction

constant the reaction

lower the Ea

Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein

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oxidizing agent

heat protein

keeping pH 7.35

pH changes

Which of the following human activities are contaminating surface and ground waters?

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pesticides

septic ranks

petroleum and natural gas production

all of these

Phosphorus is very useful in the growth of:

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leave

stem

seed

root

Which of the following human activities are contaminating surface and ground waters

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Pesticides

Septic tanks

Petroleum and natural gas production

All of these

When electricity is passed through molten electrolyte consisting of alumina and cryolite, 13.5 g of Al are deposited. The number of faradays of electricity passed must be

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2.0

1.5

1.0

0.5

Solvent extraction is an unstable,Process and it is controlled by:

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Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

The nitrogen present in some fertilizers helps plants to:

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Fight against diseases

Produce fat

Undergo photosynthesis

Produce protein

A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

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If the paper covers the funnel up to its circumstances

If the paper has got small sized pores in

If the stem of funnel is large so that it dips in to filtrate

If the paper fits tightly.

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

The number of electron pairs shared in carbon tetrachloride molecule is

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2

3

4

1

Which property is not present in Al?

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Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

Water which his considered to be safe for human consumption is known as

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Distilled water

Contaminated water

Potable water

Rain water

The amount of heat evolved or absorbed in a chemical reaction indicated by balanced chemical equation at 25° and one atmospheric pressure is called

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Enthalpy of formation

Enthalpy of neutralization

Enthaply of combustion

Enthaply of reaction

Maximum potential energy that an electron can have within the atom is:

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Equal to zero.

Less than zero.

Greater than zero.

Infinite

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