H Chem Unit 1 Revision Quiz 1

This term describes a catalyst in a different physical state to the reactants.

• Heterogeneous

• Homogeneous

This type of chemical reaction has a positive ΔH value because heat energy has been absorbed from the environment.

• exothermic

• endothermic

This periodic property is defined as 'a measure of the attraction an atom has for a pair of bonded electrons'.

• 1st ionisation enthalpy

• electronegativity

• covalent radius

• electron affinity

The more of these sub-atomic particles in an atom the greater the nuclear charge will be?

• protons

• electrons

• neutrons

This term describes a covalent bond where the electrons are not shared equally because the atoms have different electronegativities.

• polar

• non-polar

This term describes the shape of a methane molecule.

• linear

• angular

• trigonal pyramidal

• tetrahedral

This term describes liquids which mix with or dissolve in each other in all proportions e.g ethanol and water.

• miscible

• immiscible

A substance which accepts electrons during a redox reaction, therefore it is itself reduced

• Oxidising agent

• Reducing agent

Used to add a precise volume (e.g. 10cm³) of solution to the conical flask when carrying out a titration.

• measuring cylinder

• burette

• pipette

A strong oxidising agent which turns from purple to colourless as it is reduced during the redox reaction. Useful in a titration as no other indicator needs to be added to determine the end point

• Acidified potassium dichromate solution

• Acidified potassium permanganate solution