Question # 1

Coagulation of protein on treatment with heavy motal salts or heating is called.

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Decolorisation

Denaturation

^{Sedimentation process}

Reversible precipitation

Branch of chemistry that deals with the basic principles governing energy changes during various processes is called.

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Wave mechanics

Chemical kinetics

Chemical thermodynamics

Electro chemistry

The pH of the 0.0032 M H2SO4 is.

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3.2

4.0

2.198

1.0

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

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75

20

60

15

The first step of formation of sugar is

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Extraction

Washing

Cutting

Clarifying

Which of the following is class of nanorods

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metals

alloys

Metal oxide and Metal sulphite

All of the above

The light source in AAS used is

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UV light

Visible light

Radio waved

Hollow cathode lamp

At extremely low pressures, the van der Waals equations for one mole may be written as.

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PV = RT + Pb

PV = RT

PV = RT - a/V

(P +a) (V-b) = RT

The reagent which can be used to distinguish acetophenone from benzophenone is.

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2,4 -dinito phenyl hydrazine

Li AIH4

Benedict reagetn

I2 and Na2CO3

Artificial nitrogen fixation may occur by the formation of.

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Nitric acid

Ammonia

Nitrides

Any of above

Ammonia is utilized for

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Manufacture of urea

Oxidation to nitric acid

Manufacture of ammonium sulphate

All above

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

Each of the following when present at para position decreases the acidic strength of phenol except.

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-NH2

-Cl

CH3O-

CH3-

Which of the following species is not a basic radical.

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Ag+

Cl-

Ba2+

K+

The full form of STM is

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Scanning Tunneling Microscope

Scientific Technical Microscope

Systematic Technical Microscope

SuperTensile Microscope

The penultimate shell of carbon contains electrons.

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s2

s2p6

s2p6d10

s2p6d8

A^o or 10 Dq is called crystal field.

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Energy

Splitting energy

Stabilization energy

None of above

Which of the following is not a component of hollow cathode lamp.

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Anode

Cathode

Filter gas

Atomic vapour

In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.

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Group 1

Group 18

Group 4

Group 14

Arrange the hydrides of group 15 in the correct order of reducing nature.

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NH3 < PH3 < AsH3 < Sb H3 < BiH3

NH3 > PH3 >AsH3 >Sb H3 > BiH3

PH3 < AsH3 < SbH3 < BiH3 < NH3

PH3 > AsH3 > SbH3 > BiH3 > NH3

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

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 %

Which of the following statements is not correct regarding the structure of DNA.

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It has a double helix structure.

There are hydrogen bonds in its structure

Unlike RNA there is no fixed ratio of bases in DNA

The code for protein synthesis is given by the sequence of bases in DNA

Glycerol on dehyeration gives

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Allyl alcohol

Aerolein

CHOH = C= CHOH

-CHO -CHOH -CH2OH

The entropy of the universe

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Tends towards a maximum

Tend towards a maximum

Tends to be zero

Remains constatn

Turpentine is obtained from._______________

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Oak tree

Pine tree

Birch tree

Lemon tree

Human hearing is sensitive to frequency in the range of about

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10,000 - 20,000 Hz

10 - 10,000 Hz

16- 20,000 Hz

None of the above

A drop of a liquid acquires spherical shape because of.

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Its viscous nature

Capillary action

The tendency to acquire minimum surface are

Its shape

The concentration required to give a signal equal to three times the standard deviation of the baseline is called.

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Sensitivity

Detection limit

Signal to noise ratio

None of the above

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

A device which is used to measure the interracial angle is known as

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Voltmeter

Potentiometer

pH Meter

Goniometer

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