Question # 1

Naphthalene balls are obtained from

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Carbon

Coke

Coal Tar

All of above

Noble gases are sparingly soluble in water owing to.

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Dipole -dipole interactions

Dipole -induced dipole interactions

Hydrogen bonding

Induced dipole -instantaneous dipole interactions

The commonly used catalyst in the manufacture of H2SO4

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Fe2O3 with a little CuO

v2O5

Platinized asbestos and MgSO4

All above

The number of significant figures in the number 0.216 is

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1

2

3

4

The electronegativity of phosphorus is.

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3.0

2.1

2.0

1.9

Which type of the solids are generally good conductors of electricty.

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Covalent

Ionic

Metallic

Molecular

Boron and aluminum halides are electron deficient compounds in this respect. they act as.

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Lewis acid

Lewis base

Oxidizing agent

Reducing agent

Which of the following statement is not related to the characteristics of gaseous state.

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The inter molecular forces of attraction are not strong in gaseous state

The gases do not have definite shape and volume

The gases are characterized by low density.

The gases have low comprehensibility

The oxidation state shown by phosphorus is.

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- 3

+ 3

+ 3 and +5

-3 ,+ 3 and +5

Acid rain is caused due to increase in the concentration of _______ in the atmosphere

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Ozone and dust

CO2 and CO

SO3 and CO

SO2 and NO2

A red color gas, on condensing ti gives a dark blue liquid.

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NO

N2O

N2O3

N2O4

D(+) glyceraldebydes has the absolute configurtion.

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E-

S-

E-

Z-

In the process of electrosmosis

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Colloidial particles move towards the electrodes

Both colloidal particles and dis persons medium move

Only dispersion medium moves to carry the current

Positively charged colloidal particles move, but negatively charged particles remain stationary

The alkali metal that react with nitrogen directly to form nitrides.

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Na

K

Rb

Li

Metal are

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Hard

Ductile

Malleable

All

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

BCl3 is an example of hybridization

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sp

sp2

sp3

None of above

The number of hydrogen bond present in G -C pair is

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1

2

4

3

The electronic configuration of some elements are given below. The element with highest electron affinity is

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1s2, 2s2, 2p3

1s2, 2s2, 2p4

1s2, 2s2, 2p5

1s2, 2s2, 2p6

Which of the following is homopolymer.

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Starch

Plexiglas

Orlon

All of these

All the member of group III A are metals except.

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B

Ai

Ga

In

Eosin dye belongs to the group of dyes known as.

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Nitroso syes

Triphenylmethane dyes

Diphenylmethane dyes

Phthalein dyes

Which of the following technique has flame as a source of excitation energy.

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UV spectroscopy

I-R spectrocscopy

Flame photometry

Raman spectroscopy

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

Arrange the following in order of increasing boiling point.

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CH3OH < CH3Cl < RbCl < CH4

CHOH < CH4 < CH3Cl < RbCl

RbCl < CH3Cl < CH3OH < CH4

CH4 < CH3Cl < CH3OH < RbCl

Which of the following statements is not related with principal requisites of water for industrial purposes.

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It should be pure and cool

It should not contain iron

It contains less quantity of line

It must be soft

The branch of chemistry dealing with the study of reactions in the Uv visible region of the spectrum in known as.

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Kinetics

Photo chemistry

Surface chemistry

Catalysis

Aluminium is used for.

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Making ultensile & framea

Making alloys

Reducing agent

All above

The only oxidation state of alkali metals in their compounds is.

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+1

+2

-1

0

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