Question # 1

Whcih is true about the equilibrium state?

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The forard reaction stops

Both forward and reverse reactions stop

Both foward and reverse reactions continue at the same rate

The reverse reaction stops

How many electron are there in the valence shell of sodium atom.

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One

Two

Three

Four

Which of the following is a heterogeneous mixture

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Concrete mixture

a solution of potassium nitrate in water

a solution of calcium hydroxide in water

Hot chocolate

Carbon -14 is used for the

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Growth of bones

Diagonosis of goiter

Age determination of old objects

All of these

Buckyballs also knowns as.

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Fullerenes

Graphite

Both a and b

None of these

The mass of one molecule of water is.

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18 g

18 mg

18 kg

18 amu

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

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Equal

Less

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None of these

Atomic number of actinium is

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57

60

89

80

Number of peiod in the periodic table are.

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7

8

5

16

4th and 5th priod of the long form of periodic table are called.

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Short periods

Normal periods

Very long peiods

Long periods

At what temperature , rate of ammonia formation and decomposition is the highest.

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200 ^oC

300^oC

400 ^oC

500 ^oC

If reversibe reaction useful for preparing compounds on large scale.

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Yes

No

They are useful only when equilirbium lies far to the left side

They are useful only when equilibrium lies far to the right side

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