Question # 1

The region in which ozone layere depletes is called.

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Ozone hole

Black hole

Both of them

None of them

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

When a reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

At which region all weather occurs?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

Which of the following is reducing sugar?

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Glucose

Maltose

Sucrose

Starch

Glucose and fructose are;

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trioses

tetroses

pentoses

hexoses

If Qc > Kc the reaction will be in

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Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

Which pollutant is not found in car exhaust gases?

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CO

O₃

NO₂

SO₃

Carbon monoxide is harmful to us because.

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It paralyses the lungs.

It damages lungs tissues.

It reduces oxygen carrying ability of haemoglobin

It makes the blood coagulate.

Specific heat capacity of water is.

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4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Wood contain the amount of carbon.

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70%

80%

60%

40%

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