Question # 1

NH₃shows maximum boiling among the hydrides of group V elements. The is due to:

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pyramidal structure of NH₃

H-bonding between its molecules

enhanced electronegative character

very small size of nitrogen

Cotton has cellulose in it:

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96%

97%

98%

99%

Choose the chief air pollutant among the following which depletes ozone layer

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Carbon monoxide

Carbon dioxide

Chloroflurocarbons and nitrogen oxides

Sulphur dioxide

Charle's law only obeys when temperature takes in ______ scale

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Celsius

Fahrenheit

Kelvin

Rickey

When 1-butene reacts with bromine, the product formed will be

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1, 3-dihydroxy butane

But-1, 2-diol

1, 3-dihydroxy butan-diol

1,2-dibromo butane

The general electronic configuration of group IV-A elements is

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ns2, np6

ns2, np4

ns2, np3

ns2, np2

Rancidification of facts and oils is due to:

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oxidation reaction

hydrolysis reaction

both a and b

hydrogenation reaction

Which of the following is not an inorganic macromolecule

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Graphite

Sand

Strach

Diamond

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The structure of a polymer depends upon how the monomer-repeating unit joins to make a polymer. What is not the type of structure of a polymer

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Synthetic polymer

Linear polymer

Branched

Cross linked or inter connected polymer

The working condition/s for SHE

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1atm pressure

1M H-solution

298K temperature

All of these

Tryosine was isolated from

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Butter

Cheese

Oils

Fats

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

Which one gives acidic reactions?

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CH₃----C≡C-------CH₃

CH₃-----CH₂-----HC=CH----CH₂

CH₃----CH=CH₂

CH₃-----C≡CH

Silicon atom is hybridized:

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sp

sp²

sp³

dsp²

The melting point is lowest for

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Be

Mg

Ca

Sr

Glass calorimeter reaction is one which we measure

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Enthalpy of combustion

Enthalpy of reaction

Pressure volume work

None of above

Which is used to remove air bubbles form metals?

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B

Be

Mg

Al

An electrolyte

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Forms complex ions solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

The formula of ketone is

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None of these

When the rate of formation of reactants is equal to the rate of formation of products, this is known as

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Chemical reaction

Chemical equilibrium

Chemical kinetics

None

AgCl is soluble is

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Aqua regia

H₂SO₄

HCl

NH₃

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