Retest for p1 chap4 and 6
Authored by Lee Yang
Chemistry
6th - 8th Grade
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Magnesium + Hydrochloric acid --> Magnesium chloride + Hydrogen
Which one of the above is your product?
i Magnesium
ii Hydrochloric acid
iii Magnesium chloride
iv Hydrogen
i, ii
i, iii
iii, iv
ii, iv
2.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Other than temperature change and sound of fizzing, what is the other 2 observation you can see during chemical reaction?
(a)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the meaning of this symbol?
Help other substances to burn
health hazard
can burn skin and eyes
damage things that live in water
4.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Define chemical reaction
(a)
5.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
When a 0.5g Magnesium react with Oxygen, a 1.0g Magnesium oxide formed.
What is the mass of oxygen that reacted?
(a)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the colour of copper precipitate?
Red
Brown
Blue
Green
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
What causes iron to rust? (give 2 condition)
(a)
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