Question # 1

The rate of reaction between A and B increases by a factor of 100 when the concentration with respect to A is increased 10 folds the order of reaction w.r.t A is

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10

1

4

2

Among alkali metal salts,the lithium salts are the poorest conductors of electricity in aqueous solution because of

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Easy diffusion of Li⁺ ions

Lower ability of Li⁺ ions to polarize water molecules

Lowest charge to radius ratio

Higher degree of hydration of Li⁺ ions.

Which of the following mineral does not contain AI?

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Cryolite

Mica

Feldspar

Fluorspar

The maximum number of electrons in a subshell for which / = 3 is

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14

10

8

4

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

The pore size of the filter paper depends upon

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Nature of the medium

Temperature of the medium

Size of the particles

Mass of the particles

Octane number can be changed by

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Isomerisation

Alkylation

Cyclisation

All of these

Alum is not used

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As a mordant in dyeing

As an insecticide

In purification of water

In tanning of leather

The number of atoms in 0.0004 g of magnesium is close to

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24

2 x 10²⁰

10²⁰

6.02 x 10²³

The number of oxygen atoms in 4.4 g of CO₂ is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

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