Acids, Alkalis and Bases

Question 1

List the possible Acids

Answer 1

Hydrochloric, Nitric, Sulphuric, Phosphoric, Non-metal Oxides.

Question 2

List the Alkalis

Answer 2

Sodium Hydroxide, Potassium Hydroxide.

Question 3

List the Bases

Answer 3

Ammonia, Metal Oxides, Metal Hydroxides.

Question 4

List the elements that are always soluble.

Answer 4

Sodium, Potassium, Ammonium, Nitrate.

Question 5

List the elements that are insoluble unless with Sodium, Potassium and Ammonia (Except Calcium Hydroxide.)

Answer 5

Carbonate, Hydroxide, Oxide

Question 6

List the percentages and elements in air.

Answer 6

Nitrogen - 78%
Oxygen - 21%
Argon - 1%
Carbon Dioxide - 0.04%

Question 7

Metal Carbonate + Acid —->

Answer 7

Salt + Water + Carbon Dioxide

Question 8

Define an Acid

Answer 8

a H+ Donor

Question 9

Define an Alkali

Answer 9

an OH- Donor

Question 10

Define a base

Answer 10

H+ Accepter

Question 11

Colour of Universal Indicator when Acidic, neutral and Alkali.

Answer 11

Acid - Red
Neutral - Green
Alkali - Blue

Question 12

Colour of litmus indicator in different Ph substances.

Answer 12

Acid - Red
Neutral - No change
Alkali - Blue

Question 13

Colour of Methyl Orange in different Ph substances.

Answer 13

Acid - Red
Neutral - Yellow
Alkali - Yellow

Question 14

Colour of Phenolphthalein in different substances.

Answer 14

Colourless when acidic and and neutral but pink when alkali.

Question 15

Metal Oxide + Acid —>

Answer 15

Salt + Water

Question 16

Acid + Base —>

Answer 16

Salt + Water

Question 17

List the Element that is soluble except with Silver and Lead.

Answer 17

Chloride

Question 18

List the element that is soluble except with Calcium, Barium and Lead.

Answer 18

Sulphate.