Question # 1

Ecosystem is a smaller unity of

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Nydosphere

Biosphere

Lithosphere

Attmosphere

How temperature affects the electrical conductivity of metals?

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Does not change at all

Decreases with increasing temperature

Increases with increasing temperature

Decreases with decreasing temperature

The solubility product of AgCl is
2.0 x 10(-10) mol2 dm(-6). The maximum concentration Ag+ ions in the solution is:

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1.41 × 10(-5) mol. dm(-3)

1.41 × 10(-10) mol. dm(-3)

2.0 × 10(-10) mol. dm(-3)

4.0 × 10(-20) mol. dm(-3)

The respiration process taking place in animals depends on a difference in

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Partial pressure

Osomotic pressure

Vapour pressure

Atomospheric pressure

If the temperature is inereased of following reaction, then will go in N2 +3H2 <---------> .2NH3, ∆H= -Ve

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Forward direction

Reverse direction

Remain constant

Cannot be predicted

Air at sea level is dense.This is a practical application of

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

During the electrolysis of Fused NaCI, the products are

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Na and H2

Na and Cl2

Na and O2

H2 and Cl2

Commonly used coagulants are ions of:

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Ferrous

Al

Cr

Ferric

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

Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

Which of the following contains single bonds

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Benzene

Alkyne

Alkene

Alkane

Compounds of carbon and hydrogen in which the tetra valency of carbon is fully satisfied are called,

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Saturated

Un-saturated

Magnetic

Para-magnetic

German silver does not contain

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Cu

Zn

Ni

Mn

Teflon, styron and neoprene are all

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Copolymers

Condensation polymers

Homopolymers

Monomers

Purine derivative among the following bases is

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Thymine

Uracil

Guanine

Cytosine

Ethyl acetate is obtained when methyl magnesium iodide reacts with

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Ethyl formate

Ethyl choroformate

Acetyl chloride

carbondioxide

Which one of the following is used as antifreeze in the radiator

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Methanol

Ethanol

Ethylene glycol

Glycerin

The bond angle H - O - H in ice ins closest to

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120° , 28^'

60°

90°

109°

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

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Ozone

Nitrous oxide

Sulphure dioxide

Carbon monoxide

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

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1

2

3

4

Hybridzation explain the --------- of orbitals

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Type of bonding

Shapes

Shape and type of bonding

None of above

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