Question # 1

Which of the following statement is not correct regarding dissociation constant (Ka)?

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It is a measure of the tendency of an acid to split up into ions

The greater the value of Ka, more is the dissociation

It is determined by conductimetric method

It is not a proper parameter for weak acids

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

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Neon

Argon

Krypton

Xenon

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

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

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

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Plasmolysis

Sedimentation

Diffusion

Osmosis

Reverse osmosis

What % if nickel is present in the major ore Pentlandite.

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22%

18%

14%

10%

The quantum yield of a Photo chemical reaction in

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Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

Which of the following are neutral ligands.

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NH3

H2O

CO & NO

All of above

Which of the following pollutants does not a leave a residue.

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Air pollutant

Chemical pollutant

Soil pollutant

Noise pollutant

Which of the following method is used to separate small molecules form the larges molecules from the larger molecules in diffusing through a membrane.

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Dialysis

HPLC

FPLC

TLC

A major constituent of materials one whose amount in the materials is

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1% or more

0.1%

0.01%

0.001 %

The size of E coli bacteria is._____________ nm

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75000

2000

200

5

Which of the following is not an ore of nickel.

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Pentalandite

Siderite

Garnierite

Nicollite

The chief ore of aluminium is.

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Cryolite

Bauxite

Kaolin

Carnalite

Metal crystallize is system having co ordination number

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8

12

14

any one of above

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

The brown colour of the pulp obtained from chemical pulping is due to the present of

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Chlorine

Residual lignin

Sodium hydochlorite

All above

An element having low IE and low EA is likely to belong to.

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Group IA

Group IB

Group VII A

Group VIII

The branch of chemistry which is concerned with the interrelation of electrical and chemical energy is called.

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Reaction dynamics

Electrochemisty

Surface chemistry

Kinetics

Which of the following configuration is associated with biggest jump between second and third IE.

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1s2, 2s2, 2p2

1s2, 2s2, 2p6, 3s1

1s2,2s2,2p6, 3s2

1s2, 2s2,2p6

Which of the following techniques is used for the separation of macromolecules polymers.

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Size exclusion chromatogrphy

TLC

GLC

HPLC

Which substance has the greatest lattice energy.

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CuBr

MgO

KI

NaF

Which one of the following sets of elements has the strongest tendency to form negative ions in gaseous state.

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NA, Mg, Al

Ca, V, Cr

N , O, F

Ga, ln, tI

According to Arrhenius theory an acid is defined as substance which

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Accepts and electron pair

Donatees H+ ion in ammonia

Contains Cl- ions

Furnishes H3O + ion in water

Sodium react more vigorously than lithium because.

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It is a metal

It has higher atomic mass

It is more electronegative

It is more electropositive

Which of the following reagent cannot be used to detect the phenolic group.

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Neutral FeCl3

I2/NaOH

NaOH solution

Br2/H2O

Oxytocin, a pituitary hormone to

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Amino acid

Polypeptide

Protein

Conjugated protein

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

Type of hybrid orbitals used by the chlroine atom in CIO2 is.

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sp2

sp3

sp

None of these

Natural fertilizers are materials derived from

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Plants

Animal

Algae

All of above

Which statement is true.

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Resonance hybride are inherently unstable.

Resonance hybride are more static than any individual resonance form

Resonance hybride are average of all resoance forms resembling the more stabel forms

None of the above

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