Question # 1

Which of the following type of lattice has maximum numb of atoms per unit cell.

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Simple cubic

Body centred cubic

Face centred cubic

All of them

Sodium metal cannot be stored under

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Hexane

Benzene

Kerosene

Ethanol

A system is said to be in the colloidal state if the particle size of the dispersed phase ranges from

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_o

I to 10 A

10 to 10000 A

10 to 100 A

1000 to 10000 A

The IUPAC name of ethylene oxide is.

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Epoxy methane

Oxcethene

Methoxymethane

All of the above

Which of the following molecules can oxhibit geometrical isomerism.

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CH3CH = CH2

CH3CH = CHCH3

(CH3)2 C = CH2

CH3CH = C(CH3)2

In coordination chemistry the donor atom of a ligand is.

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A Lewis acid

The counter ion

The central metal atom

The atom in the legend that shares an electron pair with the metal

Acid rain effects

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Human being

Crops

Aquatic life

All above

What is the advantage of quench hardening?

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Imporoved strength

Hardness

Wear characteristics

All of the choice

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

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+1

+2

-1

0

The correct order of acidic strength is.

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HF < HCl< HI < HBr

HI <HBr < HCl < HF

HI < HBr < HF < HCl

HF < HCl < HBr < HI

Which of the following class of compounds follow the criteria of aromatically.

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The compounds must have high degree of unsaturation

they must have the property to undergo addition reactions

They must have the property to undergo substitution reactions

They must have the ability to sustain an induced current in NMR

Which of the following statement is not related with industrial ecology.

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Study of interactions between human activities and its environment

Industrial ecology seeks to optimize the total industrial materials cycle from virgin material to finished product

Industrial impacts on the environment

Economic system are viewed in isolating from their surrounding

Stainless steel contains

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Fe+Cr+Ni

Fe+Ni+Cu

Fe + Cr+ Cu

Cu + C + Ni

Gutta percha is

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Cis poly imprene

Trans -polyisoprene

Polyethylene

Polyisobutylene

Used in Geiger counter to detect radioactivity

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He

Ne

Ar

Kr

When orthoboric acid is heated strongly it gives.

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B2O3

H2B3O7

HBO2

B

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

When Phosphate rock Ca3(PO4) 2 is converted to phosphorus.

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One of the products of the reaction is water

Sulphuric acid is added to generate insoluble calcium sulphate

Hydrogen is used to reduce the phosphate to phosphorus

Silica is added to form a calcium silicate slag

The tensile strength of a carbon nanotube is __________ times that of steel.

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10

25

100

1000

Which of the following process is involved in getting back nitrogen into atomosphere.

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Nitrification

Denitricication

Ammonification

All above

Which of the following is not an organic precipitating agent.

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Diemethglyoxime

Cuperon

Oxime

Acetate

SO2 acts as

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Lewis base

Lewis acid

Botha A and B

None of above

Oil of turpentine contains

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a-pinene

b- pinene

Both A and B

Name of these

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

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Helium

Neon

Argon

Xenon

The first ionization energy in electron volts of nitrogen and oxygen atoms are respectively given by.

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14.6, 13.6

13.6, 14.6

13.6, 13.6

14.6, 14.6

Of the molecules, SF4, XeF4, and CF which has square planar geometry.

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SF4, XeF4 and CF4

Sf4 only

CF4 only

XeF4

Among the elements of second period the element with highest melting point belongs to group.

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1

14

17

18

The law of trinds was proposed by

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Dobereiner

Newlands

Lother Mayer

Chancourtois

What prefix in steel identification means composition varies from normal limits.

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E

B

X

F

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