Alkali And Others

Question 1

Alkali

Answer 1

A base that dissolves in water

Has a pH higher than 7.0

Question 2

Acid

Answer 2

Contains hydrogen
Reacts with other substances to form salts
pH below 7

Question 3

What is 7 on the pH scale?

Answer 3

Neutral

Question 4

pH 0-3

Answer 4

Red (0-1)
Orange (2)
Yellow (3)

Question 5

pH 4 - 6

Answer 5

Light green (4)
Green (5 - 6)

Question 6

pH 8

Answer 6

Turqoise / bluish green

Question 7

pH 9 - 14

Answer 7

Light blue (9)
Blue (10 - 11)
Dark blue (12 - 14)

Question 8

Alkaline definition

Answer 8

Having the properties of an alkali
/containing an alkali
Having a pH greater than 7

Question 9

Base definition

Answer 9

Substances which react with acids

Question 10

What does the universal indicator do?

Answer 10

Shows pH to indicate acidity or alkalinity of solutions

Question 11

Explosive

Answer 11

Exploding bomb

Question 12

Flammable

Answer 12

Flame

Question 13

Oxidising

Answer 13

Flame over circle

Question 14

Corrosive

Answer 14

Hand and material being corroded

Question 15

Acute toxicity

Answer 15

Skull and crossbones

Question 16

Hazardous to environment

Answer 16

Dead tree and fish

Question 17

Serious health hazard

Answer 17

Star like thing in a sillhoe of a person

Question 18

Gas under pressure

Answer 18

Bottle

Question 19

Health hazard/hazardous to the ozone layer

Answer 19

Exclamation mark

Question 20

Neutralisation

Answer 20

Reaction between an acid and a base

Acids react with metals, bases and carbonates to produce salt

Question 21

Oxide definition

Answer 21

A chemical compound that contains at least one oxygen atom and one ither element in its formula