Question # 1

Traces of acetylene are present in coal gas about.

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0.06 %

0.08%

1.1%

90%

Silicon occurs in the form of

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Silica

Silicates

both a and b

None of these

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

CO

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

The alkanes consisting of C₅ to C₁₀

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gases

liquids

solid

plasma

Potassium ferrocyanide salt is.

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Normal

complex

Basic

Acidic

Which one of the following is a fat soluble vitamin?

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A

E

K

All of these

Ammonia is prepared by the process .

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Ostwald

Haber

Clark

All

When the numbers of moles of both sides are equal in a reaction, then the unit of K_c will be:

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No unit

mol^-2 dm⁶

mol dm³

mol^-2dm

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

According to Bronsted and Lowry concept an acid is a substance that can donate.

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Proton

Electron pair

Neutron

Electron

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

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