GCSE CHEMISTRY 9 TO 1 EDEXCEL
1CH0 1H MAY 2025 PAPER 1 HIGHER
TIER COMPREHENSIVE PAST PAPER
AND ANSWER GUIDE GRADED A+
◉ True or False? Elements contain more than one atom? Answer: False
◉ What is the difference between a mixture and a compound? Answer:
A compound is chemically bonded
◉ What is the name of the pattern formed from carrying out
chromatography? Answer: A chromatograph
◉ Which method is used to separate chemicals of similar boiling points?
Answer: Fractional Distillation
◉ Who discovered that the plumb pudding model was wrong? Answer:
Ernest Rutherford
◉ Who first devised an experiment that proved the existence of the
neutron? Answer: Ernest Rutherford
◉ Why did Mendeleev leave gaps in his periodic table? Answer: For
elements that were yet to be discovered
◉ What kind of ions do metals form? Answer: positive cations
, ◉ Where are nonmetals located on the periodic table? Answer: right of
staircase
◉ What are three properties which are specific to transition metals?
Answer: Good Conductors
High melting points
Malleable
◉ What is the trend as you go down group 1? Answer: They get more
reactive
◉ How do the boiling point of the noble gases change as you go down
the group? Answer: The boiling points increase as you go down the
group
◉ How do the halogens react? Answer: They react to form ionic bonds
with metals, with a -1 charge
◉ What type of Ions do group 1 elements form? Answer: +1 negative
ion
◉ What type of Ions do group 7 metals form? Answer: -1 positive ion
1CH0 1H MAY 2025 PAPER 1 HIGHER
TIER COMPREHENSIVE PAST PAPER
AND ANSWER GUIDE GRADED A+
◉ True or False? Elements contain more than one atom? Answer: False
◉ What is the difference between a mixture and a compound? Answer:
A compound is chemically bonded
◉ What is the name of the pattern formed from carrying out
chromatography? Answer: A chromatograph
◉ Which method is used to separate chemicals of similar boiling points?
Answer: Fractional Distillation
◉ Who discovered that the plumb pudding model was wrong? Answer:
Ernest Rutherford
◉ Who first devised an experiment that proved the existence of the
neutron? Answer: Ernest Rutherford
◉ Why did Mendeleev leave gaps in his periodic table? Answer: For
elements that were yet to be discovered
◉ What kind of ions do metals form? Answer: positive cations
, ◉ Where are nonmetals located on the periodic table? Answer: right of
staircase
◉ What are three properties which are specific to transition metals?
Answer: Good Conductors
High melting points
Malleable
◉ What is the trend as you go down group 1? Answer: They get more
reactive
◉ How do the boiling point of the noble gases change as you go down
the group? Answer: The boiling points increase as you go down the
group
◉ How do the halogens react? Answer: They react to form ionic bonds
with metals, with a -1 charge
◉ What type of Ions do group 1 elements form? Answer: +1 negative
ion
◉ What type of Ions do group 7 metals form? Answer: -1 positive ion
