Question # 1

Has the highest value of electronegativity

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F

Cl

Br

I

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

The thermal conductivity of an SWNT along length is _____ watt/(m.k)

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35

330

386

3500

The group H steels can be used n what temperature range.

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600^oC to 1100 ^oC

1000 ^oC to 1500 ^oC

1100 ^oC to 2000 ^oC

200 ^oC to 800 ^oC

The configuration of valence shell of certain atom X is 3s2 , 3p5, which valences can it exhibit.

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1,3 only

1,5 only

1,3,5,7

1,3,4

Process of separating the racemic mixture into optically active isomers is known as.

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Resolution

Racemisation

Walden inversion

Epimerization

Which of following is used as make up chemical in Kraft process.

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Na2CO3

KCl

Na2SO4

NaOH

The variable valency is generally observed in case of.

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Transition elements

Inert gases

Normal elements

Non- metallic elements

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

Among the solvents given below, with dielectric constant (E) given in parentheses which has highest solubility of KCI?

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Benzene (E=O)

Carbon disulphide (E = O)

Methanol (E =32)

Acetone (E = 2)

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

Human hearing is sensitive to frequency in the range of about

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10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

Group IV A consist of elements

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3

4

5

6

It is possible to distinguish between optical isomers.

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Using chemical tests

By mass spectrometry

By IR spectroscopy

By polarimetry

Which of the following expressions represent the equivalent conductance.

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A = l s x 1000/V

A = Ls x 1000/C

A = Ls l/A

A = Ls/V

Ca2+ is isolelectronic with.

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Mg2+

Kr

Ar

Na+

Which of the following radical is not a member of II group.

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Cu²⁺

Cd²⁺

Ba³⁺

K+

Which of the following statements is not relevant to the Plank's quantum Theory.

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Radiant energy is not absorbed or emitted continuously

Radiant energy is emitted or absorbed in the form of small packets of energy.

The quantum oflight energy is called photon

The energy associated with photon of radiation is directly proportional to the wavelength.

Which is the following is not a buffer.

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H2CO3/HCO3

NH4Cl/NH4OH

CH3COOH/CH3COONa

NH3OH/CH3COOH

Which of the following cast irons is a high carbon silicon alloy.

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Gray iron

White iron

Malleable iron

Alloy iron

Which of the following methods does not give the weight average molecular weight.

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Sedimentation equilibrium

Sedimentation velocity

Light scattering

Osmotic method

In Ostwald's process of manufacturing nitric acid a mixture of ammonia gas with air is mantained with ratio.

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1 : 4

1 :3

1: 8

1 : 10

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

Which of the following give higher fibre strength.

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Eucalyptus

Pine

Bagnasse

Sugar cane

The _________ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated group

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Ligand

Donor

Coordination

Oxiation

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

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Mercury

Iodine

Chlorine

Flourine

Granulated sugar contains _____________% sucrose

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80

99.30

60

90

Aque regia is made by dissolving a mixture of HNO3 and HCl with ratio.

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1 : 1

1 : 3

1 : 2

1 :10

Which of the following is a planar molecule.

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Acetone

Formic acid

Acetic acid

All above

A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is

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n-butane

n-propane

n-pentane

n-hexane

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

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