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Worksheets8th Ch-4 Metals and non metals
Total questions: 21
Worksheet time: 11mins
Potassium + Oxygen gives
2K2O
2CaO
2mgO
2N2O
MgO +H2O =
MgOH
Mg2O
Mg(OH)2
Mg(O)2
Which one of the following gas burns with the "pop" sound?
Oxygen
Hydrogen
Chlorine
Hydrogen Sulphide
Which one of the following metal reacts vigorously with oxygen and water?
Sodium
Potassium
Calcium
Magnesium
When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is _______________ in nature.
Amphoteric
Alkaline
Neutral
Acidic
Identify the non-metal which exists in a liquid state in room temperature 25∘C.
Aluminium
Mercury
Iodine
Bromine
What is the chemical formula of copper sulphate?
CuSO4
CuCO3
CuCI2
CuO
When magnesium reacts with water and oxygen, what can we observe?
Coated with black layer
Does not burn
Burns with a yellow flame
Burns with a brilliant white flame.
4Fe + _________ + 2H2O = 2fe2O3H2O
CuSO4
O2
3O2
Cu
Zinc + Sulphuric = Zinc Sulphate + ______________
Oxygen
Hydrogen Gas
Nitrogen
Hydrogen Sulphate
Metals react with acids to produce _____________.
Oxygen
Smoke
Hydrogen
Nitrogen
Metal react with oxygen to produce _________ oxides and non-metal react with oxygen to produce_________ oxides.
Acidic, Basic
Basic, Acidic
Basic, Basic
Acidic, Acidic
The presence of _________ and _________ are necessary for iron to rust.
Air, Water
Rust, Water
Air, Rust
Hydrogen, Water
Chemical name of Potassium is :
Pu
K
Po
Ks
Chemical name of Sodium is :
Su
So
S
Na
Mercury is more reactive than Sodium.
True
False
In chemistry, a displacement reaction is where
a more reactive metal displaces a less reactive metal from its compound
two reactive metals join together to form an alloy
a less reactive metal displaces a more reactive metal from its compound
a more reactive metal is removed from its compound by a less reactive metal
Look at part of the reactivity series? Which one of the following statements is correct?
zinc is more reactive than magnesium
copper is the most reactive
tin is more reactive than lead
lead is more reactive than aluminium
calcium is more reactive than iron. What will be produced when calcium sulphate and iron are mixed together?
no reaction happens so the reactants stay the same
calcium and iron sulphate
iron sulphate and hydrogen
water and iron sulphate
HIDE ANSWER
When metal reacts with liquid water the products are...
metal hydroxide and oxygen gas
metal hydroxide and hydrogen gas
metal oxide and oxygen gas
metal oxide and hydrogen gas
The list which contains only metals is .......
aluminium, copper, nitrogen
iron, oxygen, hydrogen
iron, silver, aluminium
iron, sulphur, copper
