Guy's tomorrow is my science exam......plzz solve these questions for me....
Answers
Answer:
false
true
true
false
true
false
false
Answer:
9. True
10. True
11. False
12. True
13. unit of reciprocal length. (1 dioptre = 1 m−1.)
14. it gives a wider field of view, which allows the driver to see most of the traffic behind him.
15. Reaction between a acid and base to produce salt and water is called Neutralization reaction.
Ex : NaOH + HCl = NaCl + H2O
16. Calcium Sulphate Hemihydrate ( CaSO4.H2O)
17. metals are giant lattice structures, the number of electrostatic forces to be broken is extremely large, and so metals have high melting and boiling points.
18. Two or more elements combine to form a single product is called Combination reaction.
Ex: C + O2 = CO2
19. the law that the properties of the elements are periodic functions of their atomic numbers. Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.
Explanation:
plz make it as brainliest