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Answers
15)
b)the product of this reactions are SILVER CLORIDE (AgCl) and sodium nitrate (NaNO3)
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14. When a metal is attacked by substance around IT such as moisture and water IT is said to corrode and this process is called corrosion.
Formula for rust:- 4Fe + 302 ---> 2Fe2O3
15. A. law of conservation of mass
Energy can neither be created or destoryed during chemical reaction
Mass of product = Mass of reactant
16. Periscope :- Convex mirror
Flood lights :- Concave mirror
Kaleidoscope:- Convex mirror
Shaving mirror :- Concave mirror
18. Teflon is a special kind of plastic on which oil and water do not stick and because of this property teflon is used for non-stick coating on cookwares for preparing non-stick cookwares.
Teflon is a registered trademark of the Chemours company (formerly DuPont) which it uses for its range of fluoropolymers, the best known of which is polytetrafluoroethylene.
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