Question # 1

The attractive forces which are created due to repulsion of electronic cloud of the molecules are

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dipole-dipole forces

ion dipole forces

instantaneous dipole-induced dipole forces

dipole-induced dipole forces

The best concentration unit used for K⁺ ions present in potable water is

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ppm

Mole fraction

Molarity

Molality

Vapour pressure is not affected by

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Surface area

Intermolecular forces

Temperature

Nature of liquid

The rate of diffusion of a gas is proportional to

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P /√d

√p/d

P/d

√ P/d

Energy required to remove electron from an atom

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Ionization potential

Electronegativity

Electropositivity

Electron affinity

Sudden expansion of gas molecule cause cooling because

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Expansion release some amount of energy

During expansion new force of attraction are developed and energy is released

During expansion force of attraction between closest molecules break and energy is used

Kinetic energy of gas molecules increases

At equilibrium rate of evaporation and rate of condensation

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Become very high

Become very low

Become equal

Can never be equal

The particles in solids are

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widely separated and moving randomly

widely separated not moving

moving randomly but not separated

close together and vibrating slightly

During the nitration of benzene the nitrating agent is

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NO3

NO2+

NO2-

HNO3

Coenzymes are the species which increase the activity of enzymes. They are chemically

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Metal ions

non-metals

Organic acids

Organic bases

All the following decompose easily on heating to give oxygen except

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Lead nitrate

Potassium chlorate

Mercuric oxide

Manganese dioxide

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High temperature and low pressure

Low temperature and low pressure

Low temperature and high pressure

High temperature and high pressure

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During the manufacturing process of cement the temperature of the decomposition zone goes up to

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600°C

800°C

1000°C

1200°C

Which is a component of macronutrient?

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Zn

N

Mo

Cl

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

The number of bonds in nitrogen molecule is

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If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

Which of the element is not alkali metal

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Lithium

Rubidium

Francium

Magnesium

Heat absorbed by a system when its volume does not change is equal to

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Internal energy of system

Enthalpy of system

Increase in internal energy of system

Increase in enthalpy of system

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