2322779
Descrição
Quiz por julia.s.mulroone, atualizado more than 1 year ago
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Criado por julia.s.mulroone
mais de 9 anos atrás
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Questão 1
Questão
Which of these compounds is covalently bonded?
Responda
-
Iron oxide
-
Magnesium sulphate
-
Carbon dioxide
-
Sodium chloride
Questão 2
Questão
Which are properties of metals?
Responda
-
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
Questão 3
Questão
Nitrate (NO3) has a valency of 1.
Responda
- True
- False
Questão 4
Questão
When phenolphthalein comes into contact with an acid, it goes bright pink/purple.
Responda
- True
- False
Questão 5
Questão
Which of the following increases rate of reaction?
Responda
-
Increasing temperature
-
Adding a catalyst
-
Decreasing concentration
-
Increasing surface area
-
Adding a barbiturate
Questão 6
Questão
Reactivity increases as you go down the Group 1 metals.
Responda
- True
- False
Questão 7
Questão
Which of these salts are insoluble?
Responda
-
Potassium nitrate
-
Barium sulphate
-
Silver bromide
-
Sodium carbonate
-
Calcium carbonate
Questão 8
Questão
Find the chemical equation for:
Hydrogen peroxide -> water + oxygen
Responda
-
H2O2 -> 2H2O + O2
-
H2O2 -> H2O + O
-
2H2O2 -> 2H2O + O2
-
H2O2 -> H2O + O2
Questão 9
Questão
Why is a polystyrene cup used in the experiment to find a temperature change?
Responda
-
Because it is safer.
-
Because it is an insulator.
-
Because it is cheaper.
-
Because it is light.
Questão 10
Questão
Which of these are halogens?
Responda
-
Oxygen
-
Potassium
-
Chlorine
-
Fluorine
-
Helium
-
Iodine
-
Copper
-
Bromine
Questão 11
Questão
Halogens exist as monatomic molecules.
Responda
- True
- False
Questão 12
Questão
Which of the following compounds are ionically bonded?
Responda
-
Potassium chloride
-
Sulphur dioxide
-
Copper nitrate
-
Magnesium oxide
-
Hydrogen bromide
Questão 13
Questão
The ∆H for an exothermic reaction is a negative value.
Responda
- True
- False
Questão 14
Questão
Which of these would you observe in the reaction between sodium and water?
Responda
-
Shoots around surface of the water
-
Hissing sound
-
Burns with a lilac flame
-
Effervescence/fizzing
-
Never disappears
-
Melts into a shiny ball
Questão 15
Questão
The noble gases are unreactive because they are too large and have very weak electrostatic forces.
Responda
- True
- False
Questão 16
Questão
What is the test for carbon dioxide?
Responda
-
Burns with a squeaky pop
-
Turns limewater milky
-
Relights a glowing splint
-
Bleaches paper
Questão 17
Questão
Which gas relights a glowing splint?
Responda
-
Carbon dioxide
-
Ammonia
-
Hydrogen
-
Oxygen
Questão 18
Questão
In the reaction between potassium chloride and iodine, iodine displaces chloride to form potassium iodide.
Responda
- True
- False
Questão 19
Questão
Which are properties of the halogens?
Responda
-
Good conductors
-
Highly reactive
-
Alkaline
-
Poisonous
-
Bleaches
-
Metals
-
Form diatomic molecules
-
Painkillers
-
Form coloured gases
Questão 20
Questão
Why does increasing temperature increase rate of reaction?
Responda
-
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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