BTEC UNIT 5 DATA MODELLING
ASSIGNMENT 2 AND 3 LEARNING AIM B
AND C EXAM PAPER 2026
COMPREHENSIVE QUESTIONS AND
CORRECT ANSWERS
⩥ What can magnesium hydroxide (milk of magnesia) be used for?
Answer: It treats acid indigestion by raising the pH of stomach acid.
⩥ What can calcium hydroxide be used for? Answer: To treat acidic
effluent that is produced by factories. This stops it from damaging the
environment.
⩥ What acronym helps us to remember the names of electrodes?
Answer: PANIC - Positive is anode, negative is cathode.
⩥ Define electrolysis. Answer: The decomposition of a compound using
electricity
⩥ Define electrolyte. Answer: substance that conducts an electric current
when melted or dissolved in water
, ⩥ Define cathode. Answer: The electrode where reduction occurs. It is
negatively charged so attracts positive ions.
⩥ Define anode. Answer: The electrode where oxidation occurs. It is
positively charged so attracts negative ions.
⩥ What does OILRIG stand for?. Answer: Oxidation is loss of electrons
Reduction is gain of electrons
⩥ Why does electrolysis not work on solid substances?. Answer:
Because the ions are not free to move.
⩥ Define transition metal. Answer: a metal that can form one or more
stable ions with partially filled d-orbitals
⩥ State four ways in which transition metals differ from other metals.
Answer: They form coloured compounds
They form ions with variable oxidation states
They can act as a catalyst
They form complex ions
⩥ Define a complex ion. Answer: A transition metal ion bonded to one
or more ligands by coordinate bonds
ASSIGNMENT 2 AND 3 LEARNING AIM B
AND C EXAM PAPER 2026
COMPREHENSIVE QUESTIONS AND
CORRECT ANSWERS
⩥ What can magnesium hydroxide (milk of magnesia) be used for?
Answer: It treats acid indigestion by raising the pH of stomach acid.
⩥ What can calcium hydroxide be used for? Answer: To treat acidic
effluent that is produced by factories. This stops it from damaging the
environment.
⩥ What acronym helps us to remember the names of electrodes?
Answer: PANIC - Positive is anode, negative is cathode.
⩥ Define electrolysis. Answer: The decomposition of a compound using
electricity
⩥ Define electrolyte. Answer: substance that conducts an electric current
when melted or dissolved in water
, ⩥ Define cathode. Answer: The electrode where reduction occurs. It is
negatively charged so attracts positive ions.
⩥ Define anode. Answer: The electrode where oxidation occurs. It is
positively charged so attracts negative ions.
⩥ What does OILRIG stand for?. Answer: Oxidation is loss of electrons
Reduction is gain of electrons
⩥ Why does electrolysis not work on solid substances?. Answer:
Because the ions are not free to move.
⩥ Define transition metal. Answer: a metal that can form one or more
stable ions with partially filled d-orbitals
⩥ State four ways in which transition metals differ from other metals.
Answer: They form coloured compounds
They form ions with variable oxidation states
They can act as a catalyst
They form complex ions
⩥ Define a complex ion. Answer: A transition metal ion bonded to one
or more ligands by coordinate bonds
