General Knowledge

Question 1

What is an Ion

Answer 1

An ion is an atom or group of atoms in which the number of electrons is different from the number of protons

Question 2

What charge does Copper have

Answer 2

+2

Question 3

What charge does Zinc have

Answer 3

+2

Question 4

Recall the general rules which describe the solubility of common types of substances in water

Answer 4

(a) all common sodium, potassium and ammonium salts are soluble
(b) all nitrates are soluble
(c) common chlorides are soluble except those of silver and lead
(d) common sulfates are soluble except those of lead, barium and calcium
(e) common carbonates and hydroxides are insoluble except those of sodium, potassium and ammonium.

Question 5

Size of nano meter

Answer 5

1 x 10-7 metres

Question 6

Why would universal indictaor be used over litmus paper

Answer 6

Litmus paper can only show wether a substance is acid or alkaline, not by how much