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Some Basic Concepts of Chemistry
Classify the following as pure substances or mixtures: air, milk, graphite, diamond, gasoline, tap water, distilled water, oxygen, one rupee coin, 22 carat gold, steel, iron, sodium chloride, iodized table salt.
Pure substances: Graphite, Diamond, Distilled water, Oxygen, Iron, Sodium chloride,22 carat gold.
Mixtures : Air, Milk, Gasoline, Tap water, One rupee coin, Steel, Iodised table salt.
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What is the relation between temperature in Kelvin (K) and temperature on centigrade scale?
The popular unit of pressure is atmosphere, how is it related to pascal?
What are SI units of the following:
(i) Density
(ii) Molarity
(iii) Energy
(iv) Temperature ?
Out of 5.00 g and 5.0 g which one is more accurate and why?
What is iodised table salt?
Under what conditions air is considered as a heterogenous mixture?
What is gun powder?
Name two elements which are liquids.
Name two elements which are gases.
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