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Chemistry (GCSE) - Higher Tier

Summer 2015 | Question 6 (4472/02)

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Chemistry (GCSE) - Higher Tier

Summer 2015 | Question 6 (4472/02)

Q

Chemistry (GCSE) - Higher Tier

Summer 2015 | Question 6 (4472/02)

Q

Chemistry (GCSE) - Higher Tier

Summer 2015 | Question 6 (4472/02)

Q

(a)

 

 

 

 

 

 

(b)

 

 

 

 

 

 

(c)

 

Poorly answered. Many candidates focused on diamond and ignored hydrogen altogether. Vague statements that bonds in diamond are strong whilst those in hydrogen are weak were very common. Some discussed the strong intermolecular bonds in diamond. Few candidates seemed to be aware that different types of bond were broken in diamond and hydrogen.

 

The majority of candidates identified a property of graphite but explanations were often inadequate or confused. Many gave the presence of free electrons between the layers as the reason for its soft/slippery property. To gain the explanation mark for electrical conductivity, reference to free moving, mobile or delocalised electrons was required.

 

The bonding in oxygen was very well answered with most candidates gaining both marks. Some lost a mark for having the incorrect number of non-bonding electrons in the outer shell. Candidates who failed to gain any marks usually gave the bonding for chlorine.

 

Tags

  • carbon nano-tubes
  • Covalent bonds
  • Diamond
  • dot and cross diagrams
  • fullerenes
  • graphene
  • graphite
  • physical properties
  • Simple molecular structures

Chemistry (GCSE) - Foundation Tier

Summer 2014 | Question 2 (4472/01)

Z4 Marks

 

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Chemistry (GCSE) - Foundation Tier

Summer 2014 | Question 2 (4472/01)

Q

 

Chemistry (GCSE) - Foundation Tier

Summer 2014 | Question 2 (4472/01)

Q

Chemistry (GCSE) - Foundation Tier

Summer 2014 | Question 2 (4472/01)

Q

(a) A very well answered question.

 

(b) The general term ‘metal’ was often given without naming a specific metal. ‘Carbon’ and ‘hydrogen’ were other examples of unacceptable answers.

 

(c) Well answered. The structure of ‘sodium chloride’ or ‘B’ was incorrectly given by some candidates.

 

(d) Generally well answered although a few candidates incorrectly gave ‘D’.

Tags

  • carbon nano-tubes
  • Diamond
  • fullerenes
  • graphene
  • graphite
  • Ionic structures
  • metallic structure
  • Metals
  • physical properties

Chemistry (GCSE) - Foundation Tier

Summer 2013 | Question 2 (4472/01)

Z4 Marks

Show question, mark scheme and examiner comments

Chemistry (GCSE) - Foundation Tier

Summer 2013 | Question 2 (4472/01)

Q

Chemistry (GCSE) - Foundation Tier

Summer 2013 | Question 2 (4472/01)

Q

Chemistry (GCSE) - Foundation Tier

Summer 2013 | Question 2 (4472/01)

Q

(a) This question was not well answered and most of the candidates failed to gain both available marks. Many incorrectly linked graphite with a metallic structure and potassium with an ionic structure.

 

(b) Very well answered.

 

(c) This was poorly answered with many candidates naming an element rather than a compound with a simple covalent structure. Candidates must read questions more carefully.

Tags

  • carbon nano-tubes
  • Diamond
  • fullerenes
  • graphene
  • graphite
  • physical properties
  • Simple molecular structures

Chemistry (GCSE) - Foundation Tier

Winter 2014 | Question 8 (4472/01)

Z4 Marks

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Chemistry (GCSE) - Foundation Tier

Winter 2014 | Question 8 (4472/01)

Q

Chemistry (GCSE) - Foundation Tier

Winter 2014 | Question 8 (4472/01)

Q

Chemistry (GCSE) - Foundation Tier

Winter 2014 | Question 8 (4472/01)

Q

The structures were generally well known. However, explanations were often vague or imprecise, e.g. no reference to movement of electrons in part (a) and use of molecules/atoms sliding over each other in (b).

Tags

  • carbon nano-tubes
  • Diamond
  • fullerenes
  • graphene
  • graphite
  • physical properties

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