6. There are 3 solutions, a coloured precipitate forms in each with sodium hydroxide added, 1- Blue 2- Green 3-Brown, what ions were present in each of the solutions?,
1- Copper 2-Iron(2) 3-Iron(3)
1- Aluminium 2- Magnesium 3-Calcium
1-Copper 2-Iron (2)+ 3-Iron (3)
1- Iron (2) 2- Copper 3-Iron(3)
7. What is the weak called which forms when carbon dioxide reacts with the water in the atmosphere?
Sulfuric Acid
Carbonic Acid
Hydrochloric Acid
Hydrocarbononic Acid
8. What does the group number of an atom represent?
The number of days for the nuclei to decay
The proton number
The number of electrons on their outer shell/energy level
Relative atomic mass of the atom
9. Which of these halogens fits this description: 'dense, poisonous, red brown volatile liquid'?
Iodine
Bromine
Fluorine
Chlorine
10. Which of these is NOT a property of transition metals?
More reactive than Group 1 metals
Dense, strong and shiny
Good conductors of heat and electricity
The ions can form colourful compounds
11. What does not effect the postion of equilibrium within a reversible reaction?
The pressure
Using a catalyst
The temperature
12. Which of these are posionous salts which need to be removed from drinking water?
Phosphates and nitrates
Sulfates and carbonates
Hydrocarbons
Magnesium compounds
13. How can you make ethanoic acid?
By evaporation
By oxidising ethanol
By combustion
By reducing ethanol
14. Which ions cause temporary hardness?
Calcium carbonates ions
Silicon dioxide ions
Hydrogencarbonate ions
Sulfur ions
15. What happens if you react any acid(including carboxylic) with a carbonate?
Hydrogen produced only
A salt and hydrogen produced
A salt and carbon dioxide produced
Oxygen and water produced
16. Identifying metal ions, what are the colours shown when using a flame test for the ions in this order: Barium, Calcium, Potassium, Lithium, Sodium
Green, Yellow, Lilac, Crimson, Brick-Red
Yellow, Green, Brick- Red, Crimson, Lilac
Green, Brick-Red, Lilac, Crimson, Yellow
Lilac, Brick-Red, Crimosn, Yellow, Green
17. The salts formed in reactions with carbonates and carboxylic acids end in...?
...anoic
...anoate
...ethanoate
...anol
18. Which of these is NOT a rock which can cause hard water?
Gypsum
Basalt
Chalk
Limestone
19. If you add sodium hydroxide when testing for metal ions, a white precipitate forms, but then redissolves, what ion is present?
Copper 2+
Aluminium 3+
Ammonia 1-
Calcium 2+
20. How do you test for halides?
Sense of smell, if plasticy smell produced then yes
Add hydrochloric acid, if hydrogen porduced(squeaky pop tess) then yes
Add dilute nitric acid followed by silver nitrate solution and test the colour of the precipitate
Add silver nitrate solution followed by nitric acid and test colour of precipitate
