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WorksheetsG L Mock test Yr -9
Total questions: 40
Worksheet time: 25mins
Adam uses paper chromatography to find the dyes in soft drink, which dyes are present in his drink.
Dye-1
dye-2
Dye-3
dye-4
The types of reaction in the beaker is
Endothermic and heat is given up
Exothermic and heat is taken in
Exothermic heat is given up
None
When electricity passes through water, hydrogen and oxygen are produced. Which table correctly labels the compounds and elements involved in the process?
Water--> Compound
Hydrogen--> Compound
Oxygen---> Element
Water--> Compound
Hydrogen---> Element
Oxygen---> Compound
Water---> Compound
Hydrogen---> Element
Oxygen---> Element
Water---> Compound
Hydrogen---> Compound
Oxygen---> Compound
Distillation is a method based on the different:
Boiling points
Freezing points
Densities
Masses
Magnetic separation only works when the substance to separate is a:
Plastic
Metal
Liquid
Sulphur powder
Mixture separation are methods that provoque a:
Physical change
Chemical change
Chemical reaction
Phase change
Sieving is a mixture separating method used to separate solids. We can do it at home using a:
Filter paper
Washer machine
Fridge magnet
Strainer
Not all the mixtures can be separated using Crystallization method. This is because:
Not all the substances can be separated
Not all the solutes can form crystals
Not all the solvents can form crystals
Not all the substances can sublimate
"All the mixtures are separated using only one method."
This sentence is:
TRUE: The substances physically involved can be separated easily.
FALSE: Some mixtures need two or more methods to get separated.
TRUE: All the mixtures can use all the methods, you decide the one you want to use.
FALSE: The mixtures can't be separated.
If the mixture is formed by two liquids and they form an homogeneous mixture, the best separation technique would be:
Distillation
Evaporation
Crystallization
Filtration
In this reactivity series, which of the following is the most reactive element?
Gold
Calcium
Zinc
Potassium
True or False:
Magnesium is more reactive than silver.
True
False
True or False:
Lead is more reactive than iron.
True
False
What type of reaction is shown by this word equation?
lead nitrate + sodium → sodium nitrate + lead
Decomposition
Thermite
Displacement
Neutralisation
In a displacement reaction, it is the ____________ reactive metal that is displaced from a compound.
Heaviest
Least
Most
Worst
In the following reaction, which metal has been displaced?
copper sulfate + magnesium → magnesium sulfate + copper
magnesium
copper
sulfate
Complete the word equation:
lead + calcium sulfate →
lead + calcium sulfate
lead + calcium sulfide
calcium + lead sulfate
calcium + lead sulfide
Use the following observations to select the correct reactivity series (highest to lowest).
calcium + water: slow
sodium + water: fast
calcium + dilute acid: very fast
gold + dilute acid: no reaction
aluminium + dilute acid: fast
calcium, sodium, aluminium, gold
sodium, calcium, aluminium, gold
sodium, aluminium, calcium, gold
gold, aluminium, calcium, sodium
From these results Hassan can conclude..........
The contact process is a method of making sulphuric acid, the part of the process is shown in the picture left.
In this process vanadium oxide (V2O5) is used as a catalyst.
What is the function of vanadium oxide in this reaction.
It absorbs excess heat
It increases the rate of the reaction
It increases the pressure of the reactants.
It provides oxygen atom to the products.
What is formed when hydrochloric acid (HCl) reacts with sodium hydroxide ( NaOH)
water and acid
NaOH and H2O
NaCl and H2O
Sodium and Chlorine
Iron can be produced by heating iron oxide with C.
Iron oxide+ carbon----> Iron + carbon dioxide.
Which one of the metals cannot be produced by using Carbon.
Chromium
Zinc
Manganese
Lithium
When iron reacts with oxygen in the presence of water, what type of reaction is taking place?
Decomposition
Thermite
Displacement
Neutralisation
Use the periodic table given and decide which statement is correct?
Soda water is water that has bubbles carbon-dioxide in it.
Soda water is .......................
A mixture
A molecule
A compound
An element
What happens when water changes from a liquid to a gas..................
The atoms loose electrons
A new compound is formed
Molecules spread apart
Hydrogen is separated from oxygen
When salt is added to ice the ice begin to melt because the salt ...........
will lower the freezing point.
Increases the boiling point
will increase freeing point
none of the them
Lily confirms that the rate of a reaction increases with increase in temperature, the correct statement about her finding is...
No reaction below 100 C
No reaction below 200 C
No reaction above 400 C
No reaction above 100 C
In the reactivity series reactivity ..... up the group
increases
decreases
does not change
gets less dangerous
Potassium is a metal that is ........ in the series
low
high
very high
very low
........ is found low in the reactivity series
potassium
sodium
silver
magnesium
If a metal occurs naturally as the element it is very probably .........
a very reactive metal
a very unreactive metal
more reactive than hydrogen
potassium
If a metal occurs naturally as the element it very probably .........
If a metal occurs naturally as the element it very probably .........
does not react with air and water
reacts with hydrogen
burns readily in oxygen
A metal that is high in the series almost certainly occurs naturally .......
as the element
as a compound of the element
in the sea
in coal
When iron is heated with lead oxide, iron oxide and a shiny ball of lead are formed. The iron ......
has been reduced
has oxidised the lead
has reduced the lead oxide
has formed a shiny ball
When iron is heated with lead oxide, iron oxide and a shiny ball of lead are formed. From this we can deduce that ...
lead is less reactive than iron
iron is more reactive than oxygen
iron is less reactive than lead
lead is more reactive than iron
This metal (X) displaces copper from copper sulphate solution but does not displace zinc from zinc sulphate. From this we can tell that the order of reactivity (most reactive first) is
zinc; copper; X
zinc; X ; copper
copper ; X ; zinc
X; zinc;copper;
