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Quiz von julia.s.mulroone, aktualisiert more than 1 year ago
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Erstellt von julia.s.mulroone
vor mehr als 9 Jahre
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Frage 1
Frage
Which of these compounds is covalently bonded?
Antworten
-
Iron oxide
-
Magnesium sulphate
-
Carbon dioxide
-
Sodium chloride
Frage 2
Frage
Which are properties of metals?
Antworten
-
High melting and boiling points
-
Often gas at room temperature
-
Brittle; easy to break
-
Hard and shiny
-
Dense
-
Sonorous
-
Often highly reactive
-
Poor conductors
-
Good conductors
-
Malleable and ductile
Frage 3
Frage
Nitrate (NO3) has a valency of 1.
Antworten
- True
- False
Frage 4
Frage
When phenolphthalein comes into contact with an acid, it goes bright pink/purple.
Antworten
- True
- False
Frage 5
Frage
Which of the following increases rate of reaction?
Antworten
-
Increasing temperature
-
Adding a catalyst
-
Decreasing concentration
-
Increasing surface area
-
Adding a barbiturate
Frage 6
Frage
Reactivity increases as you go down the Group 1 metals.
Antworten
- True
- False
Frage 7
Frage
Which of these salts are insoluble?
Antworten
-
Potassium nitrate
-
Barium sulphate
-
Silver bromide
-
Sodium carbonate
-
Calcium carbonate
Frage 8
Frage
Find the chemical equation for:
Hydrogen peroxide -> water + oxygen
Antworten
-
H2O2 -> 2H2O + O2
-
H2O2 -> H2O + O
-
2H2O2 -> 2H2O + O2
-
H2O2 -> H2O + O2
Frage 9
Frage
Why is a polystyrene cup used in the experiment to find a temperature change?
Antworten
-
Because it is safer.
-
Because it is an insulator.
-
Because it is cheaper.
-
Because it is light.
Frage 10
Frage
Which of these are halogens?
Antworten
-
Oxygen
-
Potassium
-
Chlorine
-
Fluorine
-
Helium
-
Iodine
-
Copper
-
Bromine
Frage 11
Frage
Halogens exist as monatomic molecules.
Antworten
- True
- False
Frage 12
Frage
Which of the following compounds are ionically bonded?
Antworten
-
Potassium chloride
-
Sulphur dioxide
-
Copper nitrate
-
Magnesium oxide
-
Hydrogen bromide
Frage 13
Frage
The ∆H for an exothermic reaction is a negative value.
Antworten
- True
- False
Frage 14
Frage
Which of these would you observe in the reaction between sodium and water?
Antworten
-
Shoots around surface of the water
-
Hissing sound
-
Burns with a lilac flame
-
Effervescence/fizzing
-
Never disappears
-
Melts into a shiny ball
Frage 15
Frage
The noble gases are unreactive because they are too large and have very weak electrostatic forces.
Antworten
- True
- False
Frage 16
Frage
What is the test for carbon dioxide?
Antworten
-
Burns with a squeaky pop
-
Turns limewater milky
-
Relights a glowing splint
-
Bleaches paper
Frage 17
Frage
Which gas relights a glowing splint?
Antworten
-
Carbon dioxide
-
Ammonia
-
Hydrogen
-
Oxygen
Frage 18
Frage
In the reaction between potassium chloride and iodine, iodine displaces chloride to form potassium iodide.
Antworten
- True
- False
Frage 19
Frage
Which are properties of the halogens?
Antworten
-
Good conductors
-
Highly reactive
-
Alkaline
-
Poisonous
-
Bleaches
-
Metals
-
Form diatomic molecules
-
Painkillers
-
Form coloured gases
Frage 20
Frage
Why does increasing temperature increase rate of reaction?
Antworten
-
Higher quantity of particles, so there are more frequent collisions.
-
More kinetic energy, so particles collide more often and more frequently.
-
Lowers the activation energy required for reactions.
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