Question # 1

Essential components of every living all are.

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Nucleic acids

Enzymes

Lipids

Cell wall

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

Carbon monoxide is harmful to use because it:

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Paralyses lungs

Damages lungs

Reduce oxygen carrying ability of hemoglobin

Make the blood coagulate

The percentage of ocean in world water is.

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50%

67%

97%

25%

Ozone is an allotropic form of

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Carbon

Oxygen

Sulphur

Phosphorous

Which is present 85% in natural gas?

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Ethane

Propane

Methane

Butane

For which reaction Kf is the rate constant?

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Forward reaction

Backward reaction

Upward reaction

Downward reaction

Which are called paraffines?

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Alkyle

Alkynes

Alkenes

Alkanes

Which is used to manufacture of soap?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Which one of the following species is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

|Which one is not an Arrhenius acid?

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HCl

H2SO₄

CO₂

HNO₃

The region in which ozone layere depletes is called.

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Ozone hole

Black hole

Both of them

None of them

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