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प्रश्न
Name a metal which can be easily cut with a knife.
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उत्तर
Sodium can be easily cut with a knife.
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संबंधित प्रश्न
Liquids have definite volume but do not have definite shape.
Define matter. Give four examples of matter.
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When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
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- What is causing the zig-zag movement of particles X ?
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- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
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