D. Answer the following questions in brief.
1.
What are elements?
2.
Give the chemical symbol of iron and chlorine.
Write the chemical formulae of the following compounds:
3.
(a) Aluminium oxide
(b) Zinc acetate
4.
Balance the following equation:
Ca(OH), + HCl - CaCl + H2O
5.
What does a chemical equation represent?
6.
What are reactants and products in a chemical equation?
7.
Give one example of a combination reaction.
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