Question # 1

Which of the following statement is not related with environmental pollution.

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Direct or indirect change in any component of the biosphere

Undesirable change in the physical characteristics of the air

Undesirables change in the biological characteristics of the soil

not affecting adversely the industrial progress

The oxidation number of Mn in KMnO4

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+5

+7

+4

+3

Iodine is a grey black solid and its vapours are in color

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Grey

Black

Yellow

Violet

The point group of XeOF4 is.

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C6v

C4h

D4h

D2h

The value of Kw increase with temperature because the ionization of water.

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Positive

Negative

Endothermic

Exothermic

What is the scaling off of a surface in flakes or layers as the result of corrosion?

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Expoliation

Corrosion fatigue

Scaping

Fretting

In Nano synthesis new unsual chemical reactions are due to.

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Non equilibrium system

Equilibrium system

Isothermal system

Adiabatic process

Radon is obtained only in the radioactive decay of

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Radium

Thorium

Actinium

Any of above

The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to.

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Helmholtz law

Third law of thermodynamics

Second law of thermodynamics

Nernat heat theorem

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

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12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

The reaction of toluene with chlorine in the presence of light gives.

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Benzoyl chloride

Benzyl chloride

m-chlorotoluene

Mixture of 0 and p -chlorotoluene

Chlorination of benzene with excess chlorine in the presence of FeCl3 as Lewis acid gives.

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Chlorobenzene as a major product

o-dichlorobenzene as major product

p-dichloro benzene as an only product

A mixture of 0- and p- dichloro benzene

Arrhenius concept explained

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Constant heat of neutralization

Quantitative determination of acid base strength

Catalytic property of acid

All above

The device that convert the chemical energy of fuel directly into electrical energy is called.

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Galvanic cell

Electrolytic cell

Fuel cell

Concentration cell

Group IV A consist of elements.

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3

4

5

6

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

Fullerene or bucky ball is made up of ________ carbon atoms.

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100

20

75

60

Which of the following is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

Bromination of n-butane produces.

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I-bromobutane as the major product

2- bromobutane as the major product

Both I - bromo and 2- bromobutane with equal percentage

Both i-bromo and 2-bromo products whose percentage depends upon temperature.

Which of the following case of acid or base strength is not explained by inductive effect.

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Formic acid> acetic acid

Dimethyl amine > trimethyl amine

Dimethyl amine > methyl amine

Chloroacetic acid > acetic acid

The noble gas which was discovered first in the sun and then on the earth is.

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Helium

Neon

Argon

Xenon

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

What element is the most abundant by mass in the Earth's crust.

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Fe

H

O

K

All the halogen form oxyacide, except

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Florine

Chlorine

Bromine

Iodine

For the respiration of sea divers mixture is used.

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He & O2

Ar & O2

Ne & O2

Kr & O2

______ is used for Annealing

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Klin

Batch

Converter

Oven

Which group contains elements that exist as monoatomic molecules.

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1

2

14

18

Which of the following properties of a system does not change in a state of equilibrium.

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Density

Pressure

Colour

All above properties

Which of the following concentration term is used in respect of standard solutions.

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Normality

Formality

Molarity

All of above

The presence of which of the following in drinking water is responsible for mottling of teach.

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Mercury

Iodine

Chlorine

Flourine

Gravimetric method is based on which of the following property.

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Volume of a liquid

Volume of gas

Mass of substance

Viscosity

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