WorksheetsNational 5 Unit 2 - Nature's Chemistry
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What is produced when hydrocarbons burn is a plentiful supply of oxygen?
a)
carbon monoxide
b)
carbon dioxide
c)
carbon monoxide and water
d)
carbon dioxide and water
2.
What is a homologous series?
a)
A group of hydrocarbons with the same chemical formula and similar chemical properties
b)
A group of hydrocarbons with the same general formula and similar chemical properties
c)
A group of hydrocarbons with the same chemical formula and the same chemical properties
d)
A group of hydrocarbons with the same general formula and similar chemical properties
3.
What is the correct general formula for the alkanes?
a)
CnH2n+2
b)
CnH2n
c)
CnH2n-2
d)
CnHn
4.
What is meant by the term hydrocarbon?
a)
Compounds containing carbon and hydrogen.
b)
Compounds containing carbon, hydrogen and oxygen.
c)
Compounds containing carbon and hydrogen only.
5.
What is the correct general formula for the alkenes?
a)
CnH2n+2
b)
CnH2n
c)
CnH2n-2
d)
CnHn
6.
What is meant by the term isomer?
a)
Compounds which have the same general formula but a different structural formula
b)
Compounds which have the same general formula
c)
Compounds which have the same chemical formula
d)
Compounds which have the same chemical formula but a different structural formula
7.
How many carbons atoms are there in a molecule of butane?
a)
3
b)
4
c)
5
d)
6
8.
How many hydrogen atoms are there in a molecule of pentane?
a)
10
b)
11
c)
12
d)
13
9.
What is the correct general formula for the cycloalkanes?
a)
CnH2n+2
b)
CnH2n
c)
CnH2n-2
d)
CnHn
10.
What type of reaction do alkenes undergo when they react with bromine water?
a)
Addition
b)
Combustion
c)
Halogenation
d)
Dehydration
11.
Is cyclopentane saturated or unsaturated?
a)
Saturated
b)
Unsaturated
12.
Cyclopentane can quickly decolourise bromine water.
a)
true
b)
false
13.
Which of the following is a correct use of a carboxylic acid?
a)
Making plastics
b)
Cleaning products
c)
Toothpaste
14.
Why are alcohols good fuels?
a)
They burn with a clean flame
b)
The explode
c)
They don't produce carbon dioxide
d)
They release less energy
15.
Which of the following is made when sodium reacts with propanoic acid?
a)
sodium methanoate
b)
sodium ethanoate
c)
sodium propanoate
d)
potassium propanoate
16.
In energy calculations 'm' stands for
a)
mass
b)
mass of water
c)
mass of fuel
17.
When measuring the heat energy in a fuel, the experimental value is often less than expected. Why is this?
a)
Energy is lost to the surroundings
b)
The experiment is wrong
c)
The reaction is endothermic
18.
A reaction which releases heat energy is said to be
a)
Exothermic
b)
Endothermic
19.
Heat energy can be calculated using
a)
Eh = cmΔT
b)
Eh = cΔT
c)
Eh = cTΔm
d)
Eh = TΔm
20.
Which measurements are required in an experiment to calculate heat energy?
a)
mass of the beaker
b)
mass of water
c)
temperature of the fuel
d)
the quantity of c
100 %
