Q1. Classify the following into element s and compounds: 1) H20 2) He 3) CO Q2. What element do the following compounds contain? 1) Sugar 2) Common salt Q3 State two reasons why you think air is a mixture and water is a compound. Q4 List three points of dif
ference between compound and mixture.
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Q.1 no1
Q.2 no2
Q.3 it is mixture of various gases like nitrogen, carbon dioxide , oxygen and many inert gas.
there is variable composition.
moreover dust particles and water vapour is present.
Q.4 Melting or Boiling point: Compounds have an unchangeable definite
melting or boiling point: Mixtures lack a definite melting or boiling point
Examples of Compound and Mixture Methane, salt, baking soda, etc Brass, chromium, bismuth, etc
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