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Questions and Answers
What is the primary characteristic that distinguishes a pure substance from a mixture?
What is the primary characteristic that distinguishes a pure substance from a mixture?
- Texture
- Odour
- Colour
- Composition (correct)
Which of the following is an example of a heterogeneous mixture?
Which of the following is an example of a heterogeneous mixture?
- Air
- Water
- Blood
- Sand and water (correct)
What is the difference between metals and non-metals?
What is the difference between metals and non-metals?
- Metals are found only in nature, non-metals are synthesized in lab
- Metals are good conductors of electricity, non-metals are poor conductors (correct)
- Metals are found in solid state, non-metals are found in liquid state
- Metals are shiny, non-metals are dull
Which of the following elements is a metalloid?
Which of the following elements is a metalloid?
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What percentage of the Earth's atmosphere is composed of nitrogen?
What percentage of the Earth's atmosphere is composed of nitrogen?
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