Question # 1

The partial pressure of 0₂in the lungus is

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116 torr

159 torr

560 torr

760 torr

Why a C - Cl bond breaks by uv light

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Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

Which is correct?

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1 mm Hg = 1 torr = 1 atm

1 mm Hg = 760 torr = 1 atm

760 mm Hg = 760 torr = 1 atm

760 mm Hg = 1 torr = 1 atm

The %age composition of the auxiliary agent in a detergent is:

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10%

30%

50%

70%

Alkaline phosphatese is associated with ______ disease

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Heart disease

Rickets

Diabtese

None

If Kc value is small then equilibrium position will shift

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Towards left

Remains unchanged

Towards right

lt is always constant value

Final product of hydrolysis of nitrile is

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Ketone

Alcohol

Aldehyde

Carboxylic acid

A solid has a sharp melting point slightly above room temperature and is a poor thermal and electrical conductor, its crystal classification by bond type is

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Ionic

Metallic

Molecular

Covalent

Formula of sodium beryllite is

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Na2B4O7

Na2BeO2

BeONa

Na2B4O7 .10 H2O

Benzene has pi electron

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2

4

6

8

A polymer may be

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Homopolemer

Co-polymer

Terpolymer

All of these

Carboxylic acids having carboxyl group one is called:

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Mono carboxylic acid

Di-carboboxylic acid

Tri carboxilic acid

Tetra carboxylic acid

Acetal is produced by reacting alcohol in the presence of dry HCl with

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Acetaldehyde

Ketone

Ether

Carboxylic acid

Aldehydes is distinguished from ketones by using

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Tollen's reagent

Benedict reagent

Fehling solution

All of the above

Which of the following species has the highest ionization potential?

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Ne

Al⁺

Mg⁺

Li⁺

______ are called biocatalysts

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Organic acids

Organic bases

Enzymes

All

Which is not a calcareous material

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Lime

Clay

Marble

Marine shell

A chemical reaction is in equilibrium when

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Formation of product is minimum

Reactants are completely transformed into products

Rates of forward and backward reactions are equal

Equal amounts of reactants and products are present

Which of the following will not give iodoform test?

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Ethanol

Ethanal

Isopropyl alcohol

Benzyl alcohol

Ifk_cof a reaction productis verylarge, it indicates that equilibrium occurs :

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With the help of a catalyst.

With no forward reaction.

At a low product concentration.

At a high product concentration.

Mg becomes isoelectronic with neon when it

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Loses two electrons

Gains two electrons

Loses 1 electron

Gains 1 electron

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