Question # 1

In a system , when the chemical potential of each component is the same for all phases. the equilibrium is said to be in

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Metastable equilibrium

Thermal equilibrium

Composition equilibrium

Mechanical equilibrium

Which of the following statements is not true with reference to ionic conductors.

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Ionic conductance is due to movement of the ions

It involves the transfer of matter

It involves oxidation reduction reactions

It decreases with rise in temperature.

Water is often treated with chlorine to

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Increases oxygen content

Kill germs

Cause sedimentation

Remove insoluble impurities.

Refining is

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Extracting petroleum gas

Separation of various fraction

Heating of coal

All of above

How many varieties of commercial iron are known.

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1

2

4

3

Which of the following salt is green in colour

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Mn salt

Cr salt

Co salt

Ba salt

Alkaline hydrolysis of chloroform produces.

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HCCO

HCOO - + CO

H3COH

CHCL2 OH

In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as.

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CO2

Na2CO3

-CO

CaCO3

The matrix is usually in the form of.

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Sand

Limestone

Rocks

All

Which of the following compounds is must acdic.

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H2O

H2S

H2Se

H2Te

Homolytic fission of convalent bond results in the formation of.

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Free redicals

Carbocations

Carbonions

Both B and C

A catalyst

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Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

Which of the following bonds will be non polar.

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N - H

O - H

C - H

C l - Cl

SAN is a polymer of

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Styrene

Acrylonitrile

Both A and B

Vinyl chloride

In average composition of a good sample of cement the percentage of silica is.

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18.5%

20.5%

22.5%

24.5%

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

Which one has a co ordinate bond.

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Al2Cl6

BF3

NaCl

O2

In biological ecosystem which of the following substance is used by organisms.

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Water

Sunlight

Minerals

All above

Which one of the following sets of elements has the strongest tendency to form negative ions in gaseous state.

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NA, Mg, Al

Ca, V, Cr

N , O, F

Ga, ln, tI

Stereotsomers not related to each other as object and minor image are called.

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Enantiomers

Diastereolsomers

Conformations

Antipodes

The force responsible for dissolution of ionic compounds in water are

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Hydrogen bonds

Ion dipole forces

Ionic bonds

Van Der Waal forces

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

Bond angle is minimum in

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H2O

CO2

NH3

CH4

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

Which of the ionic possesses highest bond energy.

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C-C

Si -Si

Ge - Ge

Sn -Sn

The process of heating to redness and then slow cooling in known as

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Tempering

Annealing

Quenching

Hardening

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

Which of the following term is not used in pulping.

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Kappa number

Copper number

Bromine Number

Octane Number

The liquor is screened to exclude ________ material

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Fibrous

Polymers

Maltose

Sucrose

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

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