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Answer 1

12. Ans: Aluminium oxides are such oxides which reacts with both acids and bases and also show acidic as well as basic behaviour . Since , amphoteric oxides have the same proerties , So Aluminium oxide is called Amphoteric oxide.

13. Ans : Chromosomes are the pairs of germ cells that are important for the inheritance of characters of a child .

14. Ans : The father/ the male parent determines the sex of a child .

15. Ans : The gap between the two neurons is called Synapse in nervous system.

16 . Ans : Baking soda is a mild basic salt . So it can be used for the treatment of Indigestion.

17 . Ans : The splitting of light into its component colours is called dispersion of the light.

18. Ans : When electricity get induced in a conductor due motion of a magnet around the conductor or due to change in the current of another conductor placed close to it , is called electro- magnetic induction.

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