امتحان مادة العلوم الصف الاول الاعدادي

Name ____________________________________ class _________________

Shoes the correct answer

1. Combustion is a chemical reaction that involves:
a) Removal of carbon
b) Addition of hydrogen
c) Removal of atoms
d) Addition of oxygen

2. Rusting is a reaction that requires:
e) Iron and oxygen
f) Iron and water
g) Iron, water and oxygen
h) Iron, water and carbon dioxide

3. What type of compounds are usually formed when a metal burns in air?
i) Metal carbonate
j) Metal hydroxide
k) Metal oxide
l) Metal nitride
4. Hydrogen + oxygen

m) water
n) hydrochloric acid
o) sodium hydroxide
p) No products


5. Carbon + oxygen
q) carbon hydroxide
r) carbon dioxide
s) hydrocarbon
t) carbonate rocks

6. Methane + oxygen
u) carbon dioxide + vinegar
v) carbon dioxide + hydrochloric acid
w) carbon dioxide + sulphuric acid
x) carbon dioxide + water


7. Examples of fuels
a) wood – oil – oxygen
b) wood - gas – nitrogen
c) oil – gas - wood
d) gas –oil – water

8. A fire needs three things to keep burning. They are:
A coal , air , smoke
B natural gas , wood , heat
C heat , fuel , nitrogen
D heat , fuel , oxygen.


9. Complete the word equation for these reactions :
.

a) Magnesium + oxygen ……………………….

b) Carbon + ……………….….. Carbon dioxide

c) ………………….+ oxygen Sulphur dioxide



10 . Gas used to cook with is a hydrocarbon, formula CH4 and is called methane.

a) . What gas does it react with when it burns?
………………………………..

b) . What substance will the carbon change into when it combines with the above gas?
………………………………………………..
c) . What substance will the hydrogen change into during the reaction?
………………………..............

d) . What is the word equation for the reaction?
………………………………………………………………………………………
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