Question
Give two uses of graphical representation of motion.
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| Ion | Valency(Charges) | Ion | Valency(Charge) |
| Sodium ion | 1+ | Bromide ion | 1- |
| Ammonium ion | 1+ | Hydroxide ion | 1- |
| Calcium ion | 2+ | Sulphate ion | 2- |
| Lead ion | 2+ | Phosphate ion | 3- |
What is the chemical composition of cell wall in plants and fungi respectively?
What are the effects of air pollution on human beings?
Distinguish between the following pairs in one or two sentences for each:
Blood and lyrnph.