Question # 1

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

Natural source of citric acid is:

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Rancid butter

Fats

Lemon

Sour milk

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

All water soluble metallic oxides have characteristic of:

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acidic

basic

neutral

amphoteric

Natural gas is 85% methane, It is used to make the follwing except.

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Carbon black

Ethane

Propane

Both b and c

Our planet earth consists of ____________ natural Spheres.

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1

4

6

8

The meaning of latin word acidus is.

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Sweet

Tasteless

Salty

Sour

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

Ozone is beneficial for us as it

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Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

Such reactions which continue in both directions are called.

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Irreversible

Reversible

Nonreactive

Dynamic

ozone depletion (i.e O3--------------> O2 + O) occurs in:

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

Which one of the following compounds is an aldehyde?

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CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

How many % age of nitrogen present in air by volume?

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70%

75%

78%

80%

Uric acid is found in

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Urine

Fats

Apple

Grapes

The body reactions are catalized by.

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Amino acids

Lipids

Enzymes

Fatty acids

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