Unit 3: Physical and Inorganic Chemistry overview quiz - WJEC A-Level Chemistry quiz

$+1.00$ V

$-0.76$ V

$+0.34$ V

$0$ V

positive

negative

zero only

equal to the hydrogen electrode

The first permanent pink fading back to colourless

Colourless to the first permanent pink

Orange to a deep bottle-green colour at the end point

Blue-black to colourless as the iodine is used up

Atoms get smaller down the group and so attract electrons much more strongly

The nuclear charge falls steadily down the group from fluorine to iodine

Atoms get larger and more shielded, attracting electrons less strongly

They form progressively weaker ionic bonds with reactive metals down the group

They emit their own light, glowing with their characteristic colour in solution

They all contain a completely full d sub-shell of electrons in the central metal ion

They reflect every wavelength of visible light equally, giving the colour seen by eye

Ligands split the d orbitals and an electron absorbs visible light to be promoted

second

zero order

first order

third order

All of the species that appear in the overall balanced chemical equation

Only species involved up to and including the rate-determining step

Only the products that are formed by the end of the reaction

Only the catalyst that is used to speed up the reaction taking place

$\Delta G$ is positive at all temperatures concerned

$\Delta H$ is positive, so the reaction is endothermic

$\Delta G$ is negative or zero

$\Delta S$ is zero, so the entropy does not change at all

Concentration

Pressure

Adding a catalyst

Temperature

$2.00$

$1.00$

$0.01$

$12.00$

a strong acid together with a strong alkali

a weak acid and its conjugate base

only a weak acid with nothing else added

a strong acid dissolved in plenty of water