Question # 1

Major source of natural rubber is:

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Hevea brasiliensis plant

Para rubber plant

Acacia plant

Palm plant

When did natural rubber production started in Sri Lanka (Ceylon)?

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1900 A.D

1850A.D

1880A.D

1857A.D

In 1839 A.D., Charles Goodyear from rubber prepared:

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Tyre and tube

Vulcanized rubber

Erasing rubber

Rubber goods

In the world, largest producer of rubber is:

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Thailand

Indonesia

Malaysia

India

Annual rubber production of the world is about:

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More than 100 million tons

11.966 million metric tons

50million metric tons

200million metric tons

Hevea brasiliensis plant provide world's:

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50 percent natural rubber

95 percent natural rubber

One-third percent natural rubber

Small amount of natural rubber

At present, world's 80 percent natural rubber is produced in:

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South-east Asia

Sri Lanka

Brazil

African countries

In the beginning Natural rubber plant was discovered:

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In the Amazon river basin

In the Ganges river basin

In the Mississippi river basin

In the Congo river basin

Hevea brasiliensis's smuggled rubber seeds from Brazil were propagated in London's:

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Kew Gardens

LawrenceGardens

WahGardens

MayoGardens

Most of the natural rubber production in the world is being used:

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For manufacturing water proof cloth

For manufacturing tyre & tube

For manufacturing toys

For manufacturing utensils

For rubber plantation, trees and planted apart:

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One meter

5 meters

10 meters

20 meters

Natural rubber plant remain productive:

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For 10 years

For 20 years

For 40 years

For 25 years

Natural rubber's plant matures for rubber production:

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At the age of 5 years

At the age of 10 years

At the age of 3 years

At the age of 15 years

For best vegetative growth of natural rubber plant:

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There is not any need of rainfall

Small amount of rainfall is enough

70-100 inches rainfall is needed

Only 30 inches rain-fall is enough

From Malaysia, first time rubber export started in:

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1870 A.D

1905 A.D

1900 A.D

1920 A.D

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