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Chemistry

Chemistry
The metal that is usually extracted from sea water is

Ca
K
Mg
Na

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Chemistry
The coordination number of body centered atom in cubic structure is

4
10
8
6

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Chemistry
The most important ore of lead is

Magnetite
Siderite
Galena
Pyrolusite

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Chemistry
The heaviest naturally occurring element is:

Mercury
Thorium
Uranium
Polonium

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Chemistry
Heavy metals got their name because compared to other atoms they have

Higher atomic numbers
Higher atomic radii
Higher densities
Higher atomic masses

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Chemistry
The advantage of detergents over soaps is

Detergents are soluble in water
Detergents could not give much lather
Detergents give lather even with hard water
Soaps give lather with only soft water

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