Question # 1

An essential component of haemoglobin

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sodium

Neon

iron

Aluminium

The contents of sodium in leaf tissus vary from.

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0.01 - 10%

10-15%

12-16 %

If a key is stiff in a lock, rub the end of the key a soft pencil, which types of elements we obtain.

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Graphite

Silver

Gold

Paltinum

Oxygen and nitrogen react to form.

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Nitric Acid

Nitrogen oxide

Nitrogen peroxide

Nitrate

The process which increases the temperature in the temperatureis called

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Photosynthesis

Oxidation

Greenhouse effect

Evaporation

Bucky Ball is teh third form of pure.

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Carbon

Graphite

Magnesium

Diamond

Which gas is slightly soluble in water.

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Neon

Carbon di oxide

Argon

Oxygen

The density of ice at o°C is & nbsp

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0.918g/cm3

0.618g/cm3

0.718g/cm3

0.8/8 g/cm3

Each day a normal man breathe............ litres of air.

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20,000 to 15,000

10,000 to 15,000

15,000 to 20,000

21,000, to 31,000

The compounds consisting of Amino acids are called

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carbohydrate

Fast

Proteins

organic compounds

The deficiency of iodine in human body casue.

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Goiter

Cancer

Tuberculosis

Cholera

The most common element in the universe is

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oxygen

hydrogen

nitrogen

iron

Low iodine availability in humans causes the disease

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Goiter

Cancer

Tuberculosis

Cholera

The form of carbon which is not crystalline is.

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Charcoal

Graphite

Bucky Ball

Diamond

Iodine .......... 131 is used in treat the........................

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Cancer

Bone growth

Thyroid

Brain tumor

Ice floats on the surface of water due to.

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Higher density

Lower density

Normal density

Very High density

The amout of carbon dioxide int eh air is increased by.

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Photosynthesis

Respiration

Burning

Evaporation

The process which increases the amount of carbon dioxide in air is called

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photosynthesis

respiration

oxidation

vaporization

The sun almost entirely consists to the element

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oxygen

iron

phosphorus

hydrogen

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