Question # 1

The proper number of significant figures in the number 0.0780 is.

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3

1

4

2

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

The ion that is isoelectornic with CO is

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CN-

O2+

CO2-

N2+

Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.

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Paper chromatography

TLC

Solvnent extraction

Solid phase extraction

Both C and D

In glass making the whole combination of ingredients is called a.

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Gangue

Batch

Mixture

None of these

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

Among the elements of third period, the element with lowest boiling point belongs to group.

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1

14

16

18

The process of removing disolved impurities from a colloidal system, by means of diffusion through a suitable membrane under the influence of an electric field , is called.

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Electrosmosis

Electrodialysis

Electrophoresis

Peptization

Which of the following sets of quantum number is possible for an electron in a 4f orbital.

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n = 4,l = 3, m = 4, s = +1/2

n = 4, l= 4, m = +4 , s = +1/2

n = 4, l = 3, m = +1, s = -1/2

n = 4, l = 4, m = +1 , s = -1/2

Heisenberg's uncertainty principle precludes the exact simultaneous measurement of.

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Velocity and energy

Velocity and time

Charge density and probability

Position and momentum

What is the function of Head Box in paper making machine.

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It dry the paper

It reduces thickness of paper

It makes the surface of paper smooth

It discharge the pulp at the screen of fourdrinier table

The nutrients which are required in very small amount for the normal growth of plants are called.

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Nitrogenous fertilizers

Micronutrients

Phosphorus fertilizer

All of the above

A half cell reaction is one that

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Occurs at one electrode

Goes only half way to completion

Involves a half mole of the concentration of the solution

Always oxidizes

Which of the following expression is correct.

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C = n/RT

C = RT/n

RT = Cn

Cn = 1/RT

Which of the following dyes belongs to the group of acridine dyes.

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Acriflavin

Alizarin

Indigotin

Cyanine

Which of the following techniques are used for minimizing water pollution.

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Stabilization of ecosystem

Recharge of the waste

Waste treatment

All above

Which among the following is insoluble in water.

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LiOH

KOH

NaOH

RbOH

In DTA , theriac effect may be exothermic of endothermic These are cause by

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Fusion

Crystal structure inversion

Destruction of crystal lattice

All of above

Which of the following statement is not related to BVT

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individual orbitals lose their indention

VBT uses the concept of resonance

VBT does not explain the paramanhetic nature of molecule

it uses only valence electron

Which of the following statement is not correct with respect to hydrolytic cycle.

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Water covers about 83% of the earth's surface

Water covers about 73% of the ear5th's surface.

It is the major constituent of the lithosphere

it is essential requirement of all the organisms

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

Who coined the word nanotechnology.

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Eric Drexler

Richard Feynamann

Sumio tijma

Richard smalley

Which of the following contains both covalent and ionic bond.

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CCl4

NH4Cl

CaCl2

H2O

The expected specific waste fo petroleum industry is.

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Asphalt and tars

Paper

Cloth

Fibre

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

For one mole a gas, the total kinetic energy is equal to.

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2/3 Rt

3/2 RT

2/3 kT

3/2 kT

In which of the following species the bonds are non directional.

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NCl3

RbCl

BeCl2

BCl3

The kinetics of the decomposition of ammonia on the tungsten surface follows

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Zero order

First order

Second order

Third order

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

The lightest alkali metal is.

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Lithium

Sodium

Rubidium

Caesium

Which of the following anionic species is not separated by gravimetric analysis.

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Cl-

SO4

CH3COO-

PO4

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