Question # 1

Types of carides

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Ionic carides

Covalent carbides

Interstitial carbides

All above

The orientation of a crystalline surface is confidently defined in terms of.

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Lijima Indices

Miller indices

Clausen indices

None

Which of the following statement in not correct with respect to inductive effect.

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Bond length decrease with increase in inductive effect.

Inductive effect generates polar character in bonds

Variation in strength of aliphatic acids can be explained

It alone cna explain the basically of triphenylamine

Ozone layer of stratosphere requires protection from indiscriminate use of.

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Weather ballons

Are used as water repellents

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Carbides

Silicon

Silicones

Silicates

The contact process is mainly used when acid is required for the manufactures of.

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Explosives

Fine chemicals

Lead accumulators

All above

Concentrated aqueous sodium hydroxide can separate a mixture of.

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Al3+ and Sn2+

Al3+ and Fe3+

Al3+ and Zn2+

Zn2+ and Pb2+

The number of moles of solute dissolved in 1000 gram of the solvent is called

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Formality

Molality

Molarity

Mole fraction

Which of the following technique is useful to remove metal ions from an interfering matrix.

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Solvent extraction

Electrophorests

Cataphorests

Gel permeation

The yellow colour of chromates changes to orange red on acidification, due to the formation of.

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Cr3+

Cr2O3

Cr2O7^2-

Cro3

Which one of following is non polar

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CH2Cl2

CCl4

CHCl3

CH3Cl

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

The electrical conductivity of a nano tube is __________ times that of copper.

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10

100

1000

1/100

The term accuracy refers to how near the observed value is to.

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Mean value

Low value

True value

Standard value

Both C and D

Helium is used for

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The preservation of food

Filling electrical transformer

Pressuring agent in rockets

All of above

Radon is obtained only in the radioactive decay of

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Radium

Thorium

Actinium

Any of above

Calander stock is a process in paper making in which.

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Thickness of the paper is reduced

Surface of paper is made smooth

Moisture is removed

Both A and B

Which of the following substance is not present in acid rain.

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Sulphuric acid

Nitric acid

Acetic acid

Sulphurous acid

Which of the following is the statement of third law of thermodynamics.

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Entroy of perfectly crystalline substance is zero at T = 0

Entropy of a perfectly crystaline substance is zero at standard state conditions

Entropy and enthalpy of a substance become equal at T = 0

Free energy of a crystalline substance is zero at T = 0

Pick out incorrect statement about K2Cr2O7

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It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Glass industry requires soda ash with

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Solids density 1.91 and bulk density 1.0

Solids density 1.86 and bulk density 0.6

Solid density 1.80 and bulk density 0.58

All of above

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

Sugar and common salt in a mixture can be separated through then process of.

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Sublimation

Distillation

Ion exchange

Crystallization from solution in ethanol

If the absorbed light is green the transmitted light will be

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Purple

Orange

Violet

Black

The colour of Ni2+ ion is.

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Blue

Green

deep green

Orange

Which of the following substance is colloidal in nature.

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Clay

Al2O3

Fe2O3

All above

What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?

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Cyaniding

Nitriding

Flame hardening

Stability

The Langmuir theory of unimolecular adsorption is generally valid at.

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Low pressures and low temperature

Low pressures and high temperature

High pressures and low temperature

High pressure and high temperature

Which of the following process is a source of nuclear pollution.

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Uranium mining

Uranium processing

Reactor waste

All above

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Temporary hard water is softened on industrial scale by adding.

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Mg(OH)2

Ca(OH)2

KOH

NaOH

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