Question # 1

Inert pair effect plays an important role in case of

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F

AI

Si

TI

Bromine is obtained on a commercial scale from

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Caliche

Carnallite

Common satl

Cryolite

The relative rates of diffusion of a gas (Mol, wt. - 98) as compared to hydrogen will be

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1/7

1/5

1/4

1

1 mole of CH₄ contains

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6.02 x 10²³ atoms of H

4 g-atom of hydrogen

1.81 x 1023 molecules of CH₄

3.0 g of carbon

Fertilizer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

For the reaction

2A(g) + B(g) 3C(g) + D(g)

two moles each of A and B were taken into a flask The following must always be true when the system attained equilibrium

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[A] = [B]

[A] < [B]

[B] = [C]

[A] > [B]

In crystal structure of sodium chloride the arrangement of CI^- ions is

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Fee

Both fee and bcc

Bee

None of these

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 following has zero valency

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Na

Be

AI

Kr

2 g oxygen contains number of atoms equal to that in

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0.5 g of hydrogen

4 g of sulphur

7 g of nitrogen

2.3 g of sodium

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

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