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What are polyatomic ions? Give two examples.
A polyatomic ion is a charged ion composed of two or more covalently bounded atoms. Examples: Carbonate (CO32-) and sulphate (SO42-)
What information does the following chemical equation convey?
Zn + H2SO4 → ZnSO4+ H2
What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2
What are polyatomic ions? Give two examples.
Name the fundamental law that is involved in every equation.
What is the valency of :
fluorine in CaF2
What is the valency of :
sulphur in SF6
What is the valency of :
phosphorus in PH3
What is the valency of :
carbon in CH4
What is the valency of :
nitrogen in the following compounds:
(i) N2O3 (ii) N2O5 (iii) NO2 (iv) NO
Why should an equation be balanced? Explain with the help of a simple equation.
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