2537080
Questão 1
Questão
Ionic compounds have high melting points
Responda
- True
- False
Questão 2
Questão
when aqueous ionic compound do not conduct electricity
Responda
- True
- False
Questão 3
Questão
which of the ionic compounds is insoluble?
Responda
-
Barium nitrate
-
sodium sulfate
-
lead chloride
-
potassium hydroxide
Questão 4
Questão
barium nitrate can be used for x-rays
Responda
- True
- False
Questão 5
Questão
even though barium sulfate is toxic why is it safe to consume before x-rays?
Responda
-
it doesn't harm humans
-
it is insoluble
-
acid in the stomach neutralises it
-
it's only a small amount
Questão 6
Questão
what colour does potassium give off in a flame test?
Responda
-
violet
-
purple
-
lilac
-
RAINBOW
Questão 7
Questão
sodium gives off brown in a flame test
Responda
- True
- False
Questão 8
Questão
calcium gives off red in a flame test
Responda
- True
- False
Questão 9
Questão
what colour does copper produce in a flame test
Responda
-
yellow
-
black
-
blue
-
burgundy
Questão 10
Questão
which 2 from the list below are added to a solution to test for sulfate ions?
Responda
-
Dilute nitric acid
-
potassium chloride
-
barium chloride
-
dilute hyrdrochloric acid
Questão 11
Questão
what gas makes limewater go cloudy?
Responda
-
Hydrogen
-
carbon dioxide
-
methane
-
nitrogen
Questão 12
Questão
which 2 from the list below are added to a solution to test for chloride ions?
Responda
-
dilute nitric acid
-
dilute hydrochloric acid
-
Silver nitrate
-
sodium hydroxide
Questão 13
Questão
if i react lead nitrate and sodium chloride what will be the precipitate?
Responda
-
sodium nitrate
-
lead chloride
Questão 14
Questão
which of these is soluble?
Responda
-
barium sulfate
-
silver chloride
-
lithium hydroxide
-
sodium carbonate
Questão 15
Questão
ionic bonds have very strong electrostatic forces of attraction between oppositely charged ions
Responda
- True
- False
Questão 16
Questão
in a precipitate reaction why do i use distilled water rather than water?
Responda
-
distilled water makes the reaction happen quicker
-
distilled water allows the precipitate to be more visible when it's formed
-
distilled water has no ions that could interfere with the reaction
Questão 17
Questão
how many electrons would sodium lose if it reacted with chlorine?
Responda
-
1
-
2
-
3
-
4
Questão 18
Questão
which of these is insoluble?
Responda
-
Caesium carbonate
-
francium nitrate
-
rubidium sulfate
-
ammonium carbonate
Questão 19
Questão
spectroscopy can be used to identify elements
Responda
- True
- False
Questão 20
Questão
what colour is silver chloride?
Responda
-
beige
-
grey
-
white
-
yellow
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