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प्रश्न
Air is a pure substance.
पर्याय
True
False
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उत्तर
Air is a pure substance- False.
correct statement
Air is a mixture of gases.
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संबंधित प्रश्न
Give the main difference between a pure substance and an impure substance.
______ has the same properties throughout the sample.
A ______ substance is made up of only one kind of particle.
Complete the Analogy.
Made up of one kind of particles: Pure substance:: Chemical combination of two or more element: ______.
Give any two characters of a pure substance.
Name the process associated with the following
Dry ice is kept at room temperature and at one atmospheric pressure.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
Iron filings and sulphur were mixed together and divided into two parts, ‘A’ and ‘B’. Part ‘A’ was heated strongly while Part ‘B’ was not heated. Dilute hydrochloric acid was added to both Parts and evolution of gas was seen in both cases. How will you identify the gases that evolved?
A substance must absorb ______ so that it can melt.
Is blood a pure substance?
