Question # 1

Unit of the rate constant depends upon the

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Molecularity of reaction

Order of reaction

Concentration terms

Number of reactants

Hydrogen diffuses six times faster than gas A.The molar mass gas of gas A is

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72

6

24

36

The best concentration unit used for K⁺ ions present in potable water is

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ppm

Mole fraction

Molarity

Molality

Some substance are good conductors of electricity in both the solid and liquid states. These substance are generally:

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molecular solids

ionic substances

metallic substances

covalent network solids

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

suppose that an ocean of mercury replaced all the air of the air of the earth . How deep would this ocean have to be to exert the same pressure as the air:

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77cm

76cm

79cm

78cm

The structure normally associated with ionic bonding is:

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a giant lattice

a simple molecule

a giant molecule

a regular arrangement of ions surrounded by a sea , or cloud, of electrons

The hetero atom in py ridine is

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Oxygen

Nitrogen

Chlorine

Sulphur

Tasteless sugars are:

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monosaccharides

trisaccharides

oligo saccharides

poly saccharides

In order to mention boiling point of water at 110∘C the external pressure should be:-

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between 760 torar an 1200 torr

between 200 torr and 760 torr

765 torr

any value of preessure

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

Which one of the following solution will have higher vapour pressure than that of water

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Aqueous solution of methanol

Aqueous solution of HCI

Aqueous solution of glucose

Aqueous solution of urea

Polymer found by the combining of three different monomers is called:

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Homopolymer

Copolymer

Ter polymer

Thermoplastic polymer

The order of reactivity for a given halogen in Grignard's reagent is:

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CH₃X > C₂H₅X > C₃H₄X > C₄H₄X

C₂H₅X > C₃H₇X > C₄H₅X > CH₄X

C₃H₇X > C₄H₇X > CH₃X > C₂H₅X

C₄H₄X > C₃H₇X > C₂H₅X > CH₄X

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0.02

0.2

50

25

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0 1

0 2

1 1

1 2

n-butane and iso butane are an example of

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Chain isomerism

Positional isomerism

Meta merism

Functional group isomerism

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

Which statement about molecule is incorrect ?

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Molecules of a substance are similar

Hemoglobin is a homo atomic molecules

Oxygen molecule is a macro molecule

It exist independently

Light emitted from a source has its wave length 500nm, then its wave number will be

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2 x 10⁶m^-1

2 x 10⁷m^-1

5 x 10⁸m^-1

5 x 10⁹m^-1

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