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General Science

General Science
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?

Thorium
Radium
Plutonium
Radan

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General Science
The most important ore of aluminum is

Calcite
Calamine
Galena
Bauxite

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General Science
Which of the following metals forms an amalgam with other metals?

Lead
Tin
Mercury
Zinc

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General Science
Chlorophyll is a naturally occurring chelate compound in which central metal is

Calcium
Magnesium
Copper
Iron

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General Science
Glass is made of the mixture of:

Sand and salt
Quartz and mica
Sand and silicates
Salt and quartz

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General Science
In which of the following activities silicon carbide is used?

Making cement and glass
Making casts for statues
Cutting very hard substances
Disinfecting water of ponds

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