Question # 1

Which of the following is a molecular disease?

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Allergy

Cancer

German measles

Sickle cell anemia

The ratio of the ionization energy of H and Be³⁺ is

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1 : 1

1 : 3

1 : 9

1 : 16

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Alum is not used

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As a mordant in dyeing

As an insecticide

In purification of water

In tanning of leather

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]

The following has zero valency

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Na

Be

AI

Kr

When electrons revolve is stationary orbits

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There is no change in energy level

They vecome stationary

They are gaining kinetic energy

There is increase in energy

Which of the following pairs are chemically dissimilar?

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Na and K

Ba and Sr

Zr and Hf

Ca and Zn

If the solvent is inflammable for heating purpose we use

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Ice bath

Water bath

Wire gauze

Thermostat

Hydrolytic conversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

Which one of the halogen acid is a liquid?

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HF

HCI

HBr

HI

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