2772744
Descripción
Test por ellamay947, actualizado hace más de 1 año
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Creado por ellamay947
hace casi 9 años
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Pregunta 1
Pregunta
What is the most likely PH when you mix acidic milk and alkali egg white?
Respuesta
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pH2
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pH6
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pH7
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pH14
Pregunta 2
Pregunta
What is the effect of putting a burning splint in oxygen?
Respuesta
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The flame will get bigger.
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It will make a popping sound.
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No reaction.
Pregunta 3
Pregunta
Give a substance which is almost neutral/ neutral.
Respuesta
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Johnson's pH 5.5 face wash.
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Facial wash with a pH of 7.3
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Body wash with a pH of 10
Pregunta 4
Pregunta
Tick the correct word equation for nitric acid reacting with sodium hydrocarbonate.
Respuesta
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sodium hydrocarbonate + nitric acid = carbon monoxide + water +hydrogen
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sodium hydrocarbonate + nitric acid = carbon dioxide + water + sodium nitrate
Pregunta 5
Pregunta
Tick the correct chemical equation for the chemical reaction in the clear blue flame.
Respuesta
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methane + flame = fire + oxygen
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methane + oxygen = carbon dioxide + water
Pregunta 6
Pregunta
Tick the correct word equation for magnesium reacting with air.
Respuesta
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magnesium + flame = bright light
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magnesium + nitrogen = magnesium nitrate
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magnesium + oxygen = magnesium oxide
Pregunta 7
Pregunta
In which gas does magnesium immediately go out?
Respuesta
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Air
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Exhaled air
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Nitrogen
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Oxygen
Pregunta 8
Pregunta
Why does magnesium go out in a jar of exhaled air?
Respuesta
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Because oxygen thins the flame.
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Because carbon dioxide contains nitrogen.
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Because the air we exhale contains carbon dioxide and carbon dioxide puts out fires.
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