Which one of these statements is true?

Graphite is a non-metal that conducts electricity

Which one of these statements is true about the blast furnace?

Carbon monoxide is used as a reducing agent

Which statement is false about collision theory

As temperature increases the particles expand

What does the equation show?

Carbon monoxide is oxidised to carbon dioxide.

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Questions 22

Answers

1
What is the capital of Brunei?
Bandar Seri Begawan
Amed
Taipei
Yeronga
2
What particles are found in the nucleus of an atom?
Protons and electrons
protons and neutrons
Neutrons , Electrons and protons
3
SEE BELOW
A
C
D
B
4
In which compounds are pairs of electrons shared between atoms?
1,2,& 3
1 ONLY
2 ONLY
1 AND 3
5
Which is the correct order of reactivity? (Most reactive first)
Aluminium, carbon, lithium
magnesium calcium aluminium
Platinum, lead , Gold
Zinc, Iron, Lead
6
SEE BELOW
D
C
A
B
7
What happens when an atom loses an electron?
Nothing changes
a positive ion forms
a negative ion forms
the atom turns neutral
8
SEE BELOW
C
B
D
A
9
Which one of these statements is true?
Graphite is a non-metal that conducts electricity
All non-metals are ductile
mercury is a solid at room temperature
a metals make a dull sound when hit
10
A more reactive halogen displaces a less reactive halogen. Which statement is false?
Iodine will displace chlorine
Fluorine will displace bromine
chlorine will displace bromine
11
What is a covalent bond?
When atoms share electrons
Neither of the above
Both of the above
When atoms gain electrons
12
In which group of the periodic table are the Noble gases found?
7
1
0
2
13
Which is a property of the of noble gases?
Inert
Pretty
Slightly unreactive
Reactive
14
Which of these isn't a use for aluminium?
Aircraft
Magnets
Paint
Tin Cans
15
Which one of these statements is true about the blast furnace?
A slag of iron oxide forms at the bottom of the furnace
Hot air oxidises the iron
Carbon monoxide is used as a reducing agent
Limestone is added to combine with excess Carbon dioxide
16
What is an ionic bond?
The attraction between a positive nucleus & free electrons
When atoms share electrons
None of the above
When atoms gain electrons
17
What is the fourth element in the periodic table?
Lithium
Beryllium
Boron
calcium
18
Which statement is false about collision theory
If particles collide with enough energy a reaction occurs.
As temperature increases the particles expand
more successful collisions = faster rate of reaction.
higher pressure = more crowded particles
19
Which one of these statements about the covalent compound carbon monoxide is true?
it conducts electricity
it has a high melting point
it has a low boiling point
it dissolves in water
20
Which of the following is not a fossil fuel?
Coal
Petroleum
Hydrogen
Methane
21
SEE BELOW
B
C
A
D
22
What does the equation show?
Carbon monoxide is reduced to carbon dioxide.
Carbon monoxide is oxidised to carbon dioxide.
Iron is oxidised to iron oxide.
Iron oxide is oxidised to iron.

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