Which statement best describes copper?

Positively charged ions & delocalised electrons

Which is the best science subject?

Chemistry (obviously!), They are all awesome!

Polar bonds occur when atoms that covalently bond together...

have different electronegativities

What does the term 'ionisation energy' mean?

Energy needed to remove 1 electron from each atom in a mole of gaseous atom

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Chem into sixth form quiz

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Questions 18

Answers

1
Balance this: KOH + H₂SO4 -> K₂SO₄ + H₂O
KOH + H2SO4 -> K2SO4 + 2H2O
KOH + 2H2SO4 -> K2SO4 + 2H2O
2KOH + H2SO4 -> 2K2SO4 + 2H2O
2KOH + H2SO4 -> K2SO4 + 2H2O
2
Name it!
2,2 - dimethyl propane
Butane
1 methyl butane
2,2 - dimethyl pentane
3
Name it!
3,5,5 trimethylhexane
2,2,4 trimethyl hexane
3,5,5 trimethylpentane
2,2,4 trimethyl pentane
4
Which statement best describes copper?
A lattice of covalently bonded atoms
Negatively charged ions and delocalised electrons
Positively and negatively charged ions.
Positively charged ions & delocalised electrons
5
Which block of the periodic table contains the transition elements?
d
f
s
p
6
Oxidation numbers tell you the charge on an atom
True
False
7
Type of reaction? : C₂H₄ + H₂O -> C₂H₅OH
Dehydration
Addition
Displacement
Condensation
8
Isotopes of the same element have different numbers of....
electrons
protons
protons and electrons
neutrons
9
Which is the best science subject?
Bio... whatever
Physics schmizzicks
Chemistry (obviously!)
They are all awesome!
10
Which factors affect the strength of an ionic bond?
Size of ions
Number of delocalised electrons
charges on ions
Size and charge of ions
11
Which one is an empirical formula?
CH3
C6H12O6
H2O2
C2H6
12
What type of formula is shown here?
Skeletal
Structural
Displayed
General
13
Other product? C₁₀H₂₂ -> C₆H₁₄ +
C4H10
C6H8
C4H8
C6H12
14
Polar bonds occur when atoms that covalently bond together...
have different electronegativities
are the same elements
have the same electronegativity
are different sizes
15
As simple covalent molecules get bigger, intermolecular forces...
stay the same
don't exist
get weaker
get stronger
16
What does the term 'ionisation energy' mean?
Energy needed to add 1 electron to each atom in a mole of gaseous atoms
Energy needed to remove 2 electrons from an atom
Energy needed to remove 1 electron from an atom
Energy needed to remove 1 electron from each atom in a mole of gaseous atom
17
Type of reaction? :Na₂CO₃ + 2HCl -> 2NaCl + CO₂ + H₂O
Addition
Thermal decompostion
Neutralisation
Cracking
18
CH₃CHO is an example of an
alcohol
alkane
carboxylic acid
aldehyde

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