Question # 1

A zero order reaction is one whose rate is independent of

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Temperature of the reaction

The concentration of the reactants

The concentration of the products

The material of the vessel in which the reaction is carried out

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

Portland cement is manufactured by using

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Limestone,clay and sand

Limestone,gypsum and sand

Limestone,gypsum and alumina

Limestone,clay and gypsum

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

Chile salt petre is

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NaNO₃

Na₂SO₄

KNO₃

Na₂S₂O₃

The equilibrium

Cr₂O^2-₇ 2CrO²₄ is shifted to right in

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An acidic medium

A basic medium

A neutral medium

It does not exist

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutron/proton ratio.

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