Question # 1

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

Steel is an alloy of iron and carbon with limits on the amount of carbon to less than _______ percent.

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2

3

1

4

a-terpioneol is obtained on hydration of which of the following with dilute H2SO4.

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Citral

Myrcene

Linalool

Limonene

Which of the halogens has lowest bond energy.

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Cl2

Br2

F2

I2

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

Nano particles may interact with the support to be.

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Partially oxidized

Partically reduced

Both a and b

None

Pick out the incorrect statement

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The geometry around 'N' atom in trimethylamine is pyramidal

The geometry around N atom in trisilylamine is planar

The nitrogen atim is trimethylamine is sp2 hybridized whilst in trisilylamine it is sp2 hybridized

Trisilylamine has donor properties whilst trimethylamine has no donor properties.

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

Conjugation of chromophore

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Deepens the colour

Lightene the colour

Shifts absorption to shorter wavelength

All of these

Ionization potential of carbon is.

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11.2

7.8

8.1

7.3

Which of the following cause water pollution.

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Smoke

Automobile exhausts

Aeroplanes

Silt and posticides

Sodium silicate is ued

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In fire proofing of wood and textiles

As a preservative of eggs

As a furniture polish

All above

Which of the following is branch chain polymer.

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Glycogen

Terylene

PVC

Orlen

A diameter of human hair is approximately ________________ m

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75000

75

7.5 x 10^-5

7.5 x 10^-9

Setting of plaster of Paris volves.

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Oxidation with atmospheric oxygen

Combination with atmosphere CO2

Dehydration

Hydration to yield another hydrate

Which of the following colligative properties can be used to characterize colloidal particles.

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Lowering in vapour pressure

Elevation in boiling point

Depression in freezing point

Osmotic pressure

Which of the following detector is used in HPLC system.

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Differential refractometer detector

UV detector

Diode array detector

All above

The chrome vanadium steels contain how many percent of vanadium.

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0.15 to 0.30

0.05 to 0.15

0.30 to 0.45

0.45 to 0.60

Biogical role of nucleic acid doe snot include

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Genetic continuity

Protein syathesis

Hybridization

Mutation

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

The electronic configuration of some elements are given below. The element with highest electron affinity is

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1s2, 2s2, 2p3

1s2, 2s2, 2p4

1s2, 2s2, 2p5

1s2, 2s2, 2p6

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

Which of the following process is involved in nitrogen flotation

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Non symmetric fixation of nitrogen

Fixation by soil bacteria

Fixation by yeast

Fixation by blue green algae

All above

The halide which is inert to water is

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PCl5

SiCl4

BCl3

SF3

When HCl is titrated against NaOH , the pH at the equivalence point is.

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zero

> 7

< 7

14

The reduction of an alkyne to alkene using Lindlar's catalyst results into

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Syn addition of hydrogen atoms

Anti addition of hydrogen atoms

A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other

A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.

Conductometry is based on

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Electric current

Electrical potential

Absorbance

Electrical conductance

The Lambert beer law states that

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Transmission is directly proportional to path length

Transmission is directly proportional to concentration

Absorbance is inversely proportional to transmission

Absorbance is directly proportional to concentration.

SO2 is generated from which of the following industry.

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Drying and packing

Paper

Pulp

paper and pulp

Which ratio decides the efficiency nano substance.

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Weight /volume

Surface area/volume

Volume/weight

Pressure/volume

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