2537080
Pregunta 1
Pregunta
Ionic compounds have high melting points
Respuesta
- True
- False
Pregunta 2
Pregunta
when aqueous ionic compound do not conduct electricity
Respuesta
- True
- False
Pregunta 3
Pregunta
which of the ionic compounds is insoluble?
Respuesta
-
Barium nitrate
-
sodium sulfate
-
lead chloride
-
potassium hydroxide
Pregunta 4
Pregunta
barium nitrate can be used for x-rays
Respuesta
- True
- False
Pregunta 5
Pregunta
even though barium sulfate is toxic why is it safe to consume before x-rays?
Respuesta
-
it doesn't harm humans
-
it is insoluble
-
acid in the stomach neutralises it
-
it's only a small amount
Pregunta 6
Pregunta
what colour does potassium give off in a flame test?
Respuesta
-
violet
-
purple
-
lilac
-
RAINBOW
Pregunta 7
Pregunta
sodium gives off brown in a flame test
Respuesta
- True
- False
Pregunta 8
Pregunta
calcium gives off red in a flame test
Respuesta
- True
- False
Pregunta 9
Pregunta
what colour does copper produce in a flame test
Respuesta
-
yellow
-
black
-
blue
-
burgundy
Pregunta 10
Pregunta
which 2 from the list below are added to a solution to test for sulfate ions?
Respuesta
-
Dilute nitric acid
-
potassium chloride
-
barium chloride
-
dilute hyrdrochloric acid
Pregunta 11
Pregunta
what gas makes limewater go cloudy?
Respuesta
-
Hydrogen
-
carbon dioxide
-
methane
-
nitrogen
Pregunta 12
Pregunta
which 2 from the list below are added to a solution to test for chloride ions?
Respuesta
-
dilute nitric acid
-
dilute hydrochloric acid
-
Silver nitrate
-
sodium hydroxide
Pregunta 13
Pregunta
if i react lead nitrate and sodium chloride what will be the precipitate?
Respuesta
-
sodium nitrate
-
lead chloride
Pregunta 14
Pregunta
which of these is soluble?
Respuesta
-
barium sulfate
-
silver chloride
-
lithium hydroxide
-
sodium carbonate
Pregunta 15
Pregunta
ionic bonds have very strong electrostatic forces of attraction between oppositely charged ions
Respuesta
- True
- False
Pregunta 16
Pregunta
in a precipitate reaction why do i use distilled water rather than water?
Respuesta
-
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
Pregunta 17
Pregunta
how many electrons would sodium lose if it reacted with chlorine?
Respuesta
-
1
-
2
-
3
-
4
Pregunta 18
Pregunta
which of these is insoluble?
Respuesta
-
Caesium carbonate
-
francium nitrate
-
rubidium sulfate
-
ammonium carbonate
Pregunta 19
Pregunta
spectroscopy can be used to identify elements
Respuesta
- True
- False
Pregunta 20
Pregunta
what colour is silver chloride?
Respuesta
-
beige
-
grey
-
white
-
yellow
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