Question # 1

Ground water is threatened with pollution from which of the following source.

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Domestic wastes

Industrial wastes

Agricultural wastes

All above

Which among the following is a Talse statement.

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SO3 is obtained by the catalytic oxidation of SO2

SO3 has trigonal planar geometry in gaseous state

SO3 in nauseous state has all S-O bonds equivalent

SO3 gas shows more solubility in water than in H2SO4

The smallest cluster of carbon atoms in Bucky balls known till today consists of ___________ carbon atoms.

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75

20

60

15

Which of the following technique is based on deposition of the analyte at appropriate electrode by the passage of the electric current.

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Chromatography

Dialysis

Electrodeposition

Solvent extraction

The suffix "ate" at the end of the name of the compiled signifies that it is.

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Cation

Anion

Neutral

None of above

Which of the following impurities are present with the bauxite.

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Silica

Ferric oxide

Alumina

Both silica and ferric oxide

When CH3COOH is titrated against NaOH the pH as the equivalence point is.

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7

> 7

o

>7

6.8

Pick out the incorrect statement for SO2

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It turns filter paper moistened with acidified K2Cr2O7

It turns starch iodate paper blue

It does not react with chlorine in presence of charcoal

It decolourises acidified KMnO4 solution.

The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.

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l,l- l........-1

l........2, l -3.......-2l

l-l-2,..........-l

l-2,l-4, ............-4l

Xenon reacts best with

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The most electropositive elements

The most electronegative elements

The hydrogen halides

Non metals

Group IV A consist elements.

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3

4

5

6

In Serpekr's process the ore is treated with which of the following.

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Carbon

Nitrogen gas

Both A and B

None of these

The bond length is measured by

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X-ray diffraction

Neutron diffraction

Microwave spectroscopy

All of above

The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to.

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760 mm of Hg

1 bar

101 k Pa

760 torr

All are correct

H-Bond has more energy than the van der Waals forces i.e.

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1.0 kcal/mole

2.0 k cal/mole

10.0 kcal/mole

20. 0 kcal mole

When FeSO4 is added in the sodium extract the compound formed is.

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Only Na4[Fe (CN)6]

Only Fe (OH)2

Only Na2So4

Mixture of all these

Helium is used in weather balloons and airships instead of H2 becuse it is.

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Lighter than hydrogen

Incombustible

More abundant than hydrogen

Radiactive

The use of acids to remove oxides and acids on hot worked steels is known as

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Tempering

Picking

Machining

Sizing

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

For assciated liquids, the value of d/M n x 10⁸ should be (where d is the density, M is the molar mass and n is the coefficient of viscosity)

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Zero

Infinte

Higher than 70

Less than 70

Which of the following cells is used to produce electricity from chemical reaction

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Electroytic cell

Galvanic cell

Voltaic cell

Fuel cell

Both C and D

Enfleurage process is ued to extract the essential oils from

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Bark of plant

Seeds of plant

Leaves of plant

Flowers of plant

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

Which of the following linear polymer.

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Polypeptide

Protein

Starch

Phenol formaldehyde resin

Tetra halides do not undergo hydrolysis

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C

Si

Sn

Pb

Which metal can produce dihydrogen gas by reaction with dil H2SO4

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Ag

Fe

Cu

Pt

The action of all the relations of all the organism to their environment is called

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Biology

Botany

Ecology

Archiology

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

What is the activation energy of a reaction whose rate constant increases by a factor of 100 upon increasing the temperature from 300 K to 360 K.

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27

35

42

69

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

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