Question # 1

If 20 ml of 0.5 N salt solution is diluted in one litre. what is the new concentration.

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0.01 N

0.001 N

1 N

10 N

All the member of group III A are metals except.

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B

Ai

Ga

In

The bond order gives the following valuable information.

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Stability of the molecules of ions

Bond dissociation energy and bond length

Magnetic properties

All of the above

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.

Hydrolytic reaction of fat with caustic soda is known as ______

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Esterification

Saponification

Acetylation

Carboxylation

Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.

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Paper chromatography

TLC

Solvnent extraction

Solid phase extraction

Both C and D

Equilibrium constant Kp and Kc are related as

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Kc = Kp (RT)delta n

Kp = Kc (RT)an

Kp = (Kc/RT)delta n

Kp -Kc = (RT)delta n

Biogical role of nucleic acid doe snot include

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Genetic continuity

Protein syathesis

Hybridization

Mutation

Most effective pesticide is

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Carbonates

Organophosphates

Organ chlorines

All of these

Sea water is converted into fresh water bases upon the phenomenon of.

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Plasmolysis

Sedimentation

Diffusion

Osmosis

Reverse osmosis

Chlorine gas acts as a bleaching agent only in presence of.

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dry air

Moisture

Sunlight

Pure oxygen

in the system of designating wrought aluminum alloys the letter F that follows the number indicates what condition of the alloy.

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As fabricated

Calcined

Annealed

Strain hardened

In whihc period, the element with least ionization enthalpy belong to

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Group I

Group 2

Group 17

Group 18

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

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

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Biology

Botany

Ecology

Archiology

Which element out of the following can exhibit a maximum co valency of seven.

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Chlorine

Fluorine

Sulphur

Both Cl and F

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

Ammonium nitrate is sold as a mixture with

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Soda Ash

Lime stone

Zinc

None of above

Metal are generally elements

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Electronegative

Electropositive

Neutral

None of the above

Which of the following statement is not related to the characteristics of gaseous state.

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The inter molecular forces of attraction are not strong in gaseous state

The gases do not have definite shape and volume

The gases are characterized by low density.

The gases have low comprehensibility

Which of the following statements not correct with the concept of Bronsted concept of acids and bases.

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An acid can donate a proton

A base can accept a proton

This concept has many bases that have OH- ions

This concept is more general

Which ionization Potential in the following equations involves the greatest amount of energy.

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Na = Na+ + e

K = K+ +e

C2+ = C3+ +e

Ca+ = Ca2+ + e

In the formation of H2O molecule, the oxygen atom makes use of.

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2p orbitals

sp hybrid orbitals

Sp2 hybrid orbitals

Sp3 hybrid orbitals

Which of of the following statement is not correct in respect of

Arrhenius concept.

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This concept is applicable only for aqueous systems.

Neutralization takes place in aqueous medium only

H+ ion concept remain as such in water

This concept is applicable for non aqueous system only.

Which of the following does not apply to metallic bond.

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Overlapping valence orbitals

Mobile valency electron

Delocalized electrons

Highly directed bonds

The unit of sound pressure level is

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Pascal

Decibel

Newton

Ampere

The increase in boiling points of noble gases from He to Xe is due to the

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Decreases in ionization energy

Increases in polarizability

Increase in electron affinity

Increase in atomic volume

Which of the following should have the largest dipole moment.

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Carbon tetrachloride

Cis-stibeue

Trans-atibeue

Cis-dichlorocthylene

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

Oil of turpentine contains

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a-pinene

b- pinene

Both A and B

Name of these

What refers to the removal of zinc from brasses?

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Dezincification

Graphitization

Stabilization

Denitration

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