Question # 1

Which of the following metal cannot evolve hydrogen from the acetic acid

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Sodium

Potassium

Magnesium

Copper

As gases can adopt the shape of the container so they have

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no fixed shapes

fixed shapes

different shapes

definite shapes

Plasma proteins are separated by

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Dialysis

Electrophoresis

Filtration

Alcohol precipitation

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

Lonic solids are characterized by:

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low melting points

_{good conductivety in solid state}

high vapour pressures

solubility in polar solvents

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

Which one of the following is an aromatic compound?

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Benzene

Thiophene

Furan

All of them

SN2-reactions can be usually observed in

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Primary alkylı halide

secondary alkyl halide

Tertiary alkyl halide

Both A. and B

Soaps are basically salts of

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Glycerol

Triglyceride

Fatty acid

Fat

Glucose forms a polymer which is stored in liver the name of this polymer is:

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glycogen

starch

cellulose

arnylose

Which is not a calcareous material?

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line

clay

marble

marine shell

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

During the preparation of alkynes the active metals that react with tetra halo-alkanes are

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Zn

Mg

Both a and b

None

Group VI-B of transition elements contains:

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Zn, Cd, Hg

Fe ,Ru ,Os

Cr, Mo ,W

Mn, Te, Re

The experimental relationship between a reaction rate and the concentration of reactants is called

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Order or reaction

Rate law

Activated complex

Molecularity

Property of transition element is :

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Low m.p and b.p

Parramagnetism

Oxidation state

Low binding energies

An electron with n = 3 , l = 2 will be in the sub-shell

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3p

3d

3f

3s

When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:

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Alpha rays.

Negative particles.

Electromagnetic rays.

Positive particles.

Ethylene decolorizes cold dilute solution of KMnO₄. This test is known as

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Colouration test

Baeyer's test

Silver mirror test

Ring test

The shape of gaseous SnCl₂is

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Tetrahedral

Linear

Angular

T-shaped

The overlapping of two partially filled atomic orbital is in such a way that the probability of finding the electron pair is maximum along the axis joining the two nuclei, the bond is

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Sigma bond

Pi bond

Ionic bond

Non-polar bond

Hydrolysis of Grignard's reagent gives:

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Alkane

Alkyl

Halide

Alcohol

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