Question # 1

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

The total number of protons in 10 g of calcium carbonate is (N_o = 6.023 x 10²³)

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1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

Which of the following statement regarding catalyst is not true?

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A catalyst remains unchanged in composition and quantity at the end of the reaction

A catalyst can initiate a reaction

A catalyst dose not alter the equilibrium in a reversible reaction

Catalysts are sometimes very specific in respect of reaction

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

Which one is primary alcohol?

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Buten-2-oI

Propan-2-oI

Butane-1-oI

2,3-Dimethylhexane-4-oI

Which of the following fluorides does not exist?

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NF₅

PF₅

AsF₅

SbF₅

The following has zero valency

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Na

Be

AI

Kr

The principle constituent of pyrex glass is

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Zn

B

Pb

CI

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

An endothermic reaction is one in which

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Heat is converted into electricity

Heat is obsorbed

Heat is evolved

Heat is converted into mechanical work

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