Questions on February mock IACT

Question 1

Describe the test for oxygen gas

Answer 1

• put glowing splint in gas
• will delight in oxygen

Question 2

Explain what is meant by the term relative atomic mass

Answer 2

• average mass of storm of an element
• compared to carbon 12

Question 3

State features of an homologous series

Answer 3

• same general formula
• same function group
• differ by -CH2
• similar chemical properties
• there is a trend in physical properties

Question 4

1. Atomic number is a number of ….
2. Mass number is a number of…
3. Electrons =

Answer 4

1. Protons
2. Neutrons
3. Number of Protons

Question 5

Explain why displacement reactions halogens are redox reactions

Answer 5

• the halogen atoms gain electron and are reduced
  -the halide ions lose electrons and are oxidised