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IGCSE Edexcel Chemistry revision Exam Questions with complete solutions latest 2025 100% Verified.
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  • IGCSE Edexcel Chemistry Revision

IGCSE Edexcel Chemistry revision Exam Questions with complete solutions latest 2025 100% Verified.

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  • January 7, 2025
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • alloys
  • igcse edexcel chemistry revision exam
  • activation energy ans the minimum energy requi
  • alkane ans a saturated hydrocarbon with the ge
  • alkene ans an unsaturated hydrocarbon with the

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  • IGCSE Edexcel Chemistry revision
  • IGCSE Edexcel Chemistry revision

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IGCSE Edexcel Chemistry revision

Activation energy - ANS- The minimum energy required by colliding particles for
reaction to occur.

Alkane - ANS- A saturated hydrocarbon with the general formula= CnH2n+2

Alkene - ANS- An unsaturated hydrocarbon with the general formula = CnH2n

Alloys - ANS- Mixtures of metal that are made by mixing molten metals.

Ammonia - ANS- Gas that turns damp litmus paper blue.

Anion - ANS- A negatively charged ion that move towards the Anode during electrolysis.

Anode - ANS- Positive electrode, where oxidation occurs.

Atom - ANS- The smallest particle of an element that can take part in a chemical
reaction.

Base - ANS- A substance that neutralises an acid to form a salt.

Bauxite - ANS- The main ore of aluminium, from which aluminium oxide
is extracted.

Bitumen - ANS- Fraction used for road surfaces and covering flat roofs of buildings

Black - ANS- The color of iodine at rtp

Blue - ANS- The color of the precipitate produced when copper 2 reacts with aqueous
sodium hydroxide.

Brine - ANS- A concentrated solution of sodium chloride in water.

Brown - ANS- The color of the precipitate produced when Iron 3 reacts with aqueous
sodium hydroxide.

Calcium - ANS- When passed over a Bunsen burner turns flame Brick Red.

Carbon dioxide - ANS- Gas that turns lime water cloudy

, Catalyst - ANS- A substance that speeds up a chemical reaction but which is chemically
unchanged at the end of the reaction.

Cathode - ANS- Negative electrode , where reduction occurs.

Cation - ANS- A positively charged ion that move toward the Cathode during
electrolysis.

Chlorine - ANS- Gas that bleaches the color from damp litmus paper.

Compound - ANS- A substance made from two or more elements chemically bonded
together.

Covalent Bonding - ANS- The sharing of electrons between a non metal and a non metal

Cracking - ANS- The process of breaking long chain alkane molecules into short chain
alkanes and alkenes.

Cream - ANS- The color of precipitate when an Bromide reacts with dilute nitric acid and
silver nitrate solution.

Crystallisation - ANS- Method used to separate mixtures of solid dissolved in liquid,
reliant on the fact that solids are more soluble at higher temperatures.

Diesel oil - ANS- Fraction used for fuel for buses,lorries,trains and cars

Displacement reaction - ANS- A reaction in which one substance replaces another.

Distillation - ANS- Method used to separate a mixture of liquid using the differences in
their boiling points.

Dynamic equilibrium - ANS- When the rate of the forward reaction and backward
reactions in a reversible reaction mixture are equal.

Electrode - ANS- A solid electrical conductor that forms the connection between the
electrolyte and the external electrical circuit in electrolysis.

Electrolysis - ANS- The process in which electricity is used to break compounds down
into their elements.

Electrolyte - ANS- The mixture that is being electrolysed that must be liquid to allow ions
to move.

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