OCR CHEMISTRY A PAPER H432 01 MARK SCHEME SET 1 CERTIFICATION EVALUATION EXAMS 2026 SOLVED QUESTIONS AND SOLUTIONS GRADED A+

OCR CHEMISTRY A PAPER H432 01 MARK
SCHEME SET 1 CERTIFICATION
EVALUATION EXAMS 2026 SOLVED
QUESTIONS AND SOLUTIONS GRADED A+

⩥ What is the word equation for combustion of methane? Answer:
Methane + oxygen → carbon dioxide + water


⩥ What are mixtures? Answer: Two or more substances not chemically
bonded, easily separated.


⩥ What is filtration used for? Answer: Separating insoluble solids from
liquids.


⩥ What is distillation? Answer: Separates liquids with different boiling
points.


⩥ What is crystallisation used for? Answer: To obtain a soluble solid
from a solution.


⩥ What is chromatography used for? Answer: To separate soluble
substances like ink or food dye.

, ⩥ What is a pure substance? Answer: A single element or compound
with a fixed melting/boiling point.


⩥ What is a formulation? Answer: A mixture with exact amounts of
components, like medicines or paints.


⩥ What are the three states of matter? Answer: Solid, liquid, gas.


⩥ How do particles behave in a solid? Answer: Fixed in a regular
pattern, vibrate in place.


⩥ How do particles behave in a gas? Answer: Move randomly and
quickly, far apart.


⩥ What is the atomic number? Answer: The number of protons in an
atom.


⩥ What is the mass number? Answer: Number of protons + neutrons.


⩥ What are isotopes? Answer: Atoms with the same number of protons
but different neutrons.


⩥ Who created the first periodic table? Answer: Dmitri Mendeleev.