Question # 1

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 correct order of second ionization potential of carbon , nitrogen, oxygen and fluorine is.

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C > N > O > F

O > N > F > C

O > F > N > C

F > O > N > C

Which of the following statement is not correct regarding galvanic cells.

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Oxidation occurs at the anode

Ions carry current inside the cell

Electrons flow around the external circuit. form cathode to anode

When the e.m.f. of the cell is positive cell reactionis spontaneous

The variable valency is generally observed in case of.

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Transition elements

Inert gases

Normal elements

Non- metallic elements

The internal resistance to flow possessed by a liquid is called its.

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Fluidity

Viscosity

Surface tension

Turbidity

In which polymer the strength of inter molecular forces is maximum

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Elastomers

Thermoplastic

Fibre

Cross linked polymer

Which of the following statement is not true in case of catalytic reforming.

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High temperature results in loss of reformate yield

High naphthenic stock require high space velocity

Presence of water decrease the hydrocracking activity.

None of above

The theoretical plate in chromatography is represented by how many equilibrium step

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One

Two

Three

Four

The number of bonds formed by the central atom is called its.

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Valence number

Complex number

Coordination number

Avogadro's number

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

Which of the following anionic species is not separated by gravimetric analysis.

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Cl-

SO4

CH3COO-

PO4

Which of the following group reagent is used for III group of basic radical.

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Dilute HCl

H2S + HCl

NH4OH + NH4Cl

NH4OH + H2S

Which of the following is not biological characteristics of water.

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COD

Animals

Plants

Viruses

Transition metal possess

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Definite color

Catalytic power

Both A and B

None of above

Which of the following statement is not related with the effect of thermal pollution.

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Decrease in BOD

Increase in BOD

Reduction in DO

Change in algal production

The function of boiling the sodium extract with conc. HNO3 before testing the halogens is

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To make solution clear

To make the solution acidic

To bring common ion effect

To destroy CN- and S2- ion

Ammonia when used directly as a fertilizer is to be injected about_____ under the surface to keep it from seeping out.

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2 inches

4 inches

6 inches

10 inches

Which of the following is capable of shown g optical isomersm.

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CH3COCOOH

CH3CHOHCOOH

Botha a and b

All of these

The mole of photon is known as

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Quantum

Eienstein

Energy Packet

None of the above

Which of the following is the active ingredient in ordinary household bleach.

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HCl

Cl2

NaCl

NaCIO

In order to understand the nature of H , bond the theory has been suggested.

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Electrostatic approach

Molecular orbital approach

Valance bond approach

All the above approaches

Metallic magnesium is obtained by

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Reduction of MgO with Coke

Electrolysis of an aqueous solution of MgCl2

Electrolysis of molten MgCl2

Displacement of magnesium by iron form MgCl2 solution.

Given A + 3B ____________ 2C + D

This reaction is first under with respect to reactant A and second order with respect to reactant B . If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by factor of _____________

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Increase ,2

Decrease ,2

Increase ,4

Decrease ,4

At the some temperature 0.1 M solution of urea is isotonic with.

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0.1 M glucose solution

0.1 M NaCl solution

0.1 M urea solution

0.1 M BaCl2 solution

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

Which of the following is an azo dye.

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Congo red

Rhodamine B

Ertythroein

Paraosaniline

Petroleum is mixture of

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Petrol

Diesal

Petroleum

All of these

The relative error is usually expressed as

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Parts per ten

Parts per one

Parts per hundred

Botha C and D

The substance added to the soil to provide one or more nutrient elements essential for plants growth are called.

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Growth hormones

Fertilizers

Salts

Minerals

Which of these historical works of art contain nanotechnology.

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Lycurgus cup

Medieval stained glass windows in churches

Damascus steel swords

All of the above

Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron.

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10%

5%

20%

8%

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