Question # 1

Optimum PH rang for amylases is

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6 - 6.4

6.4 - 6.6

6.4 - 6.9

6.6 - 6.9

Mostly ionic compounds are produced between elements of group

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IA and IIA

IB and VIB

IA. IIA and VII-A

IA and IB

Lind's ,method for liquefaction of gases is based on the principle of:

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Graham's law of diffusion

Joule Thomson effect

Avogadro's hypothesis

Dalton's law of partial pressure

The gas which obeys the gas laws at all conditions of temperature and pressure is

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ideal gas

perfect gas

real gas

noble gas

All of the following have cleavage planes except:

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molecular crystals

metallic crystals

covanent crystals

ionic crystals

Lysine

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Basic Only ketogenic

Ketogenic glucogenic

Acidic glucogenic

Non essential

The volume of an ideal gas is decreased to half, What will happen to the force exerted on the walls of the container by the gas particles?

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the force is halved

the force increases by a factor of 4

the force remains constant

the force increased by a factory of 2

The Sl mechanism for the hydrolysis of an alkyl halide to an alcohol involves the formation of

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Carbocation

Carbanion

Pentavalent carbon in the transition state

Free radical

Which of the following contains maximum of number of molecules?

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100 cc of CO₂ at STP

150 cc of N₂at STP

50 cc of SO₂ at STP

200 cc of NH₃ at STP

The destruction of the biological nature and activity of proteins by heat or chemical agent is called:

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Dehydration

Oxidation

Denaturation

Polymerization

If a graph is plotted between temperature on x-axis and volume on Y-axis for 1 mole of gas,then we get straight line which cuts the temperature axis at

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-300°C

300 K

-273.15 K

273.15°C

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Caroxyl group has functional in it.

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one

two

three

four

Hydrolysis of protein by 6M HCl gives peptides and thenα-amino acids. How manyα-amino acids molecules are obtained on the hydrolysis of a tetrapeptide

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2

3

4

5

Which metal of Group-II A of the periodic Table, will form the least ionic chloride

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Be

Mg

Ca

Sr

In the atmosphere, O₂is about

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10%

15%

21%

25%

Isotopes of an element differ in

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Number of protons

Number of electrons

Number of neutrons

Number of electrons and protons

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

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Glyceraldehyde

Dihydroxy acetone

Glycerose

None

Carboxylic acids generally exists in cyclic

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Monomers

Dimers

Trimers

Tetrameter

Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?

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O₂

N₂

Br₂

F₂

A compound used as eye wash:

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Borax

Boric acid

Metabolic acid

Pyroboric acid

Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is

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