Question # 1

Final paper wound in the form of a real having final moisture of about.

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6-8%

9 - 12 %

13-15 %

4 - 10%

A general trend in the properties of elements of carbon family shows that with increase in atomic number.

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The tendency towards concatenation increases

The tendency to show +2 oxidation state increase

Metallic character decreases

The tendency to form complexes with convalency higher than four decreases.

Oxalic acid when heated withe conc. H2SO4 it gives out.

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H2O and CO2

CO and CO2

CO2 and H2S

Oxalic sulphate

Green houses are responsible for keeping our plant warm and sustaining life on the earth.

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CO2 & water vapours

CO2 & CFC

CO2 & H2O

CO2 & CH4

d2 sp3 is oriented in a manner

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Trigonal

Tetrahedral

Octahedral

Trigonal bipyramidal

Which of the following represents the correct order of ionic radii

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La+ < Na+ < K+ < Rb+

Li+ > Na + > K+ >Rb+

Li = Na + = K+ = Rb+

Rb +> Na+> K+ > Li+

Which of the following chloride is soluble in hot water.

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Hg2Cl2

AgCl

PbCl2

All above

The number 8.47 is rounded to

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8.5

8.4

8.7

8.6

A correct reaction mechanism for a given reaction usually is.

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The same as the balanced chemical equation

Obvious if its heat of reaction is known

Sometimes difficult to prove

Obvious if the activation energy is known

The most suitable method of separation in mixture of o-and p- nitrophenol is.

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Steam distillation

Chromatography

Ion-exchange

Sublimation

Valences bond theory was put forward by

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Pauling and Slatter

Heitler and London

Lewis

Pauli

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids.

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Alkaline

Alkydes

Alcocide

Ketones

Which of the following does not represent Lewis acid.

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ZnCl2

FeCl2

BF3

Bul4

The process of passing of a precipitate into colloidal solution, on adding an electrolyte is called.

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Dialysis

Peptization

Electrophoresis

Electromsmosis

Fullerene or bucky ball is made up of ________ carbon atoms.

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100

20

75

60

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

Hydrocarbon X (C6H12) on oxidation with hot alkaline (KMnO4) gives a mixture of prop ionic acid and dimethyl ketone. The structure of compound X is

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CH3CH = CHCH2CH2CH3

(CH3)2 C = CH CH2 CH3

CH3CH2CH = CHCH2CH3

(CH3)2 C = C (CH3)2

According to the Debye-Huckel theory of strong electrolytes, and ion moving in an atmosphere of oppositely charged ions experience a drag This effect is known as

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Aaymmetric effect

Electrophoretic effect

Inter ionic effect

Concentration effect

The velocity possessed by maximum fraction of molecules at a given temperature is called.

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Average velocity

Root mean aquare velocity

Most probable velocity

None of the above

The common temperature detecting device in DTA are.

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Thermocouples

Thermopiles

Thermistore

All

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

Which of the following properties of a system does not change in a state of equilibrium.

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Density

Pressure

Colour

All above properties

Which of the following is homopolymer.

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Starch

Plexiglas

Orlon

All of these

Finely divided iron combines with CO to give.

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Fe(CO)5

Fe2(CO)9

Fe(CO)12

Fe(CO)6

The chief ore of aluminium is.

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Cryolite

Bauxite

Kaolin

Carnalite

The pink colour of phenolphthalen in in basic medium is due to the

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Cationic form

Anionic form

Natural form

OH- ions of the base

1-Chlorobutane on reaction with alcohols potash gives.

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1- butane

1-butanol

2- butane

2- butanol

The hardest material found in nature is

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Steel

Topaz

Diamond

Quartz

Which of the following electrode is normally used as reference electrode for a potentiometer.

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Platinum electrode

Calomel electrrode

Silver electrode

Copper electrode

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