Question # 1

Hook worm infects.

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Liver

Small intestine

Large intestine

Stomach

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

Fertilizers are used to make up the deficiency of;

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oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

Which ion cause water hardness?

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Al²

Mg²

Fe²

Na²

How many percentage to water contains oceans?

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67%

77%

87%

97%

One H₂O molecule can form hydrogen bonding with how many other H₂O molecules?

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One

Two

Three

Four

The surface tension of water is:

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very low

moderate

high

zero

Sodium zeolite is resin of:

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NaAl(SiO₃)₂

KAl(SiO₃)₂

LiAl(SiO₃)₂

RbAl(SiO₃)₂

Calcium carbonate is in water.

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Insoluble

Sparingly

None of them

Soluble

the removal of which ion causes water softening.

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Na⁺

Mg²

Li⁺

K⁺

Mercury poisoning cause:

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neurological damage

high blood pressure

kidney damage

gastro

A sea level the boiling point of water is.

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0^oC

98^oC

100^oC

110^oC

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