Iodised salts contains the iodine salts of which metal?

A: Potassium

B: Iodine

C: Sodium Chloride

D: Chlorine

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Potassium

Materials for rain-proof coats and tents owe their water proof properties to___?

A: Viscosity

B: Surface tension

C: Specific gravity

D: Elasticity

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Surface tension

The human heart is __ ?

A: Pulsating Heart

B: Ampullary Heart

C: Myogenic Heart

D: Neurogenic Heart

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Myogenic Heart

A person with which of the following blood groups can receive blood of any group?

A: AB

B: A

C: B

D: O

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AB

What animal has longest gestation period of about 640 to 660 days or 95 weeks of any land animal ?

A: Elephant

B: Blue Whale

C: Opossum

D: None of these

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Elephant

Which group of animals has heterogametic females?

A: Earthworm

B: Domestic fowl

C: Rabbit

D: None

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Earthworm

How long does the earth take to cover 1° longitude?

A: 3 Minutes

B: 2 Minutes

C: 4 Minutes

D: 5 Minutes

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4 Minutes

Which lenses are used by people having short-sightedness?

A: Concave

B: Convex

C: Concavo-convex

D: Plain

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Concave

T.V. transmission cannot cover a very large area because

A: picture cannot be transmitted clearly after a specific distance

B: the strength of T.V. waves is very limited

C: the shape of the earth is spherical

D: the air is not a good conductor of light and sound/waves

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the shape of the earth is spherical

SI unit of time is____?

A: kilo gram

B: second

C: meter

D: volt

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second

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