Question # 1

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

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live stock waste

agricultural pesticides

oil beaks and spills

all of the above

Vapour pressure is not affected by

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Surface area

Intermolecular forces

Temperature

Nature of liquid

In the reaction A2 (g) + 4B2 (g) <-----------> 2AB4 (g) such that ∆H < 0, the formation of AB4(g) will be favoured at

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Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of

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Fomation of CO2

Fusion ofC2H4

Combustion of C2H4

Vaporization of C2H2

The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the

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Molecularity of the reaction

specific activity of the reaction

Order of the reaction

rate constant of the reaction

A molecule of polysacharide on hydrolysis produces ______ molecules of monosacharide

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2 - 10

3

10

2

If v is the volume of one molecule of a gas under given conditions, then Van der Waals constant b is (N_Ais Avogadro number)

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which one of the following statements bout negative ions is incorrect?

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they are also know as anions

they are formed when atoms gain electrons

they are large than the atom from which they were formed

they are smaller than the atom from which they were formed

Cyclone collector is used to reduce:

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noise pollution

air pollution

water pollution

radioactive pollution

In a crystal the atoms are locate at the position of:

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infinite potential energy

minimum potential energy

Zero potential energy

maximum potential

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

Iodoethane reacts with sodium in ether, the product formed is

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Pentene

Propyne

Butene

Butane

Which one of the following substances is a synthetic polyester

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Cotton

Nylon

Rayon

Terylene

The formation of PVC from vinyl chloride is an example of

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Substitution reaction

Addition polymerization

Condensation polymerization

Condensation reaction

Law of mass action was given by :

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Guldberg and Waage.

Berkeley and Hartly.

Ramsay and Reyleigh.

Berthelot.

The apex angle of the folded filter paper is slightly greater than :

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60°

30°

45°

90°

Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

Pressure volume work is

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The heat released is enthalpy of neutralization

The heat released is enthalpy of atomization

The heat released is enthalpy of sublimation

The heat released is enthalpy of formation

type of hybridization in CH≡CH is:

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sp

sp²

sp³

dsp²

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At equilibrium there is no further change in the concentration of Hl

At equilibrium concentration of l₂remains constant

At equilibrium concentration of H₂remains unaltered

At equilibrium the rate of formation of Hl is equal to the rate of decomposition of Hl

Molecular orbitals are filled with the available:

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Hund's of rule.

Pauli's exclusion principle.

Aufbau principle.

All of above.

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