Question # 1

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Galena is an ore of

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Gallium

Lead

Tin

Germanium

An electrolyte

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Forms complex ions in solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

A certain liberate 0.5 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphare solution?

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12.7 gm

15.9 gm

31.8 gm

63.5 gm

Enzymes are

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Proteins

Mineral

Oils

Fatty acids

An exothermic reaction is one in which the reacting substances

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Have more energy than the products

Have less energy than the products

Have the same energy as the products

Are at a higher temperature than the products

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

In which molecule carbon atom is sp² hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

In a crystal a ≠ b ≠ c, a = γ = 90° and β ≠ 90°, it is

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Monoclinic

Rhombic

Trigonal

Tetragonal

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