Edexcel A-Level Chemistry: Physical and Inorganic II overview quiz quiz

When $\Delta G > 0$

When $\Delta H$ is positive

When $\Delta S$ is zero

When $\Delta G \leq 0$

$Mg^{2+}$ and $O^{2-}$ have higher charges and smaller radii, giving stronger attraction

$Mg^{2+}$ and $O^{2-}$ carry lower charges than the ions in sodium chloride, so attract less

Sodium chloride has a giant covalent structure with strong bonds throughout the whole lattice

Magnesium oxide is a simple molecular solid held together only by weak intermolecular forces

The reaction proceeds at a fast rate with a low activation energy barrier

The reaction is thermodynamically feasible

The reaction has reached a position of dynamic equilibrium between reactants and products

The reaction is endothermic and takes in heat energy from its surroundings as it proceeds

1

2

5

8

Iron

Copper

Chromium

Zinc

d-orbitals splitting and electrons absorbing visible light to be promoted between them

Electrons being completely removed from the central metal ion to leave a bare nucleus behind

The central metal ion reacting chemically with the surrounding water molecules to make a gas

Visible light simply reflecting off the shiny surface of the solid metal in the complex

From the coefficients in the balanced equation

Only by experiment

From the relative molecular masses

From the enthalpy change

Zero order

Second order

First order

Third order

The total pressure of the mixture divided by the number of different gases present

Its mass divided by the total mass of all the gases in the mixture, as a fraction

The total pressure of the mixture minus the mole fraction of that particular gas

Its mole fraction multiplied by the total pressure

Phenolphthalein

Methyl orange

Universal indicator

Litmus