Question # 1

How is radio carbon dating useful for archeolgists.

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It helps detemine whether the matter is radioactie or not

It helps determine the age of organic matter

It helps determine the composition of matter

It helps deterime the usefulness of matter

The batteries in our vehicles are bilt on the principl of electronchemistry It is the application.

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Astrochemistry

Physical chemistry

Analyticla chemistry

Organic chemistry

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

Washing clothes at 140 ^oF uses almost the energy as at 140 ^oF wash

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Half

Thrice

Twice

None of the above

When one mole of each of the following compounds is reacted with oxygen, which wil produce the maximum amount CO2?

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Carbon

Ethane

Diamond

Methane

Aerobic respiration releases........energy than anaerobic respiration.

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Equal

Less

More

None of these

With the increase of atomic numebr , the number of electron in an atom also.

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Decreases

First increases then decreases

Increases

None of the above

Ammonia is a base, because it

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Ionizes in water to give OH- Ions

Can accept proton

Contains OH group

Can accept an election pair

Which are good conductor of heat and electricity

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Metals

Non metals

Metalloids

All of these

Quantum means.

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Virable energy

Fixed energy

High energy

Minimum energy

Empricial formula of sand is.

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SiO2

SiO3

SiO4

SiO

Whcih one of the following is the weakest force among the atoms.

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Intermolecular force

Ionic force

Metallic force

Covelent forces

How many subshells are there in M shell?

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2

4

3

5

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