Chemistry Mock 2020

Question 1 of 50

The temperature at which a liquid boils at standard pressure is its

Question 2 of 50

Group 1 elements are called the

Question 3 of 50

Elements in Group 0 (18) are unreactive because they

Question 4 of 50

The bond in sodium chloride is

Question 5 of 50

How many covalent bonds does carbon usually form?

Question 6 of 50

The IUPAC name of CH₃CH₂CH₃ is

Question 7 of 50

A reaction that absorbs heat from the surroundings is

Question 8 of 50

The burning of fuels is

Question 9 of 50

Powdered calcium carbonate reacts faster with acid than lumps because it has

Question 10 of 50

The minimum energy colliding particles need to react is the

Question 11 of 50

Food lasts longer in a refrigerator because low temperature

Question 12 of 50

At dynamic equilibrium, the rates of the forward and backward reactions are

Question 13 of 50

The salt formed when HCl reacts with NaOH is

Question 14 of 50

Atomic radius down a group

Question 15 of 50

Chlorine is added to drinking water to

Question 16 of 50

The halogens exist as

Question 17 of 50

Ionisation energy down a group generally

Question 18 of 50

The most electronegative element is

Question 19 of 50

Across Period 3 from sodium to chlorine, the elements change from

Question 20 of 50

A dative (coordinate) bond is formed when

Question 21 of 50

Metallic bonding consists of

Question 22 of 50

Water has a high boiling point for its size because of

Question 23 of 50

The weakest intermolecular forces are

Question 24 of 50

Iodine sublimes easily because its molecules are held by

Question 25 of 50

Which molecule can form hydrogen bonds?

Question 26 of 50

A series of organic compounds with the same functional group is a

Question 27 of 50

The heat change when 1 mole of a substance burns completely in oxygen is the

Question 28 of 50

Le Chatelier's principle states that a system at equilibrium

Question 29 of 50

Ethanoic acid is a weak acid because it

Question 30 of 50

Down Group 1, reactivity

Question 31 of 50

Down Group 17, reactivity

Question 32 of 50

Oxides of metals are generally

Question 33 of 50

Electronegativity across a period from left to right

Question 34 of 50

At room temperature, bromine is a

Question 35 of 50

Chlorine displaces bromine from potassium bromide because chlorine is

Question 36 of 50

The bond angle in methane is

Question 37 of 50

Ethanol has a higher boiling point than propane (similar mass) because ethanol

Question 38 of 50

For an equilibrium where Kc is very large, the position of equilibrium

Question 39 of 50

Silver halide precipitates: AgCl is white, AgBr cream and AgI is

Question 40 of 50

The pH of 0.1 mol/dm³ sodium ethanoate solution is

Question 41 of 50

Which compound contains both ionic and covalent bonds?

Question 42 of 50

Given C + O₂ → CO₂ ΔH = −394 kJ and CO + ½O₂ → CO₂ ΔH = −283 kJ, ΔH for C + ½O₂ → CO is

Question 43 of 50

If doubling [A] quadruples the rate, the reaction is

Question 44 of 50

Across Period 3, the oxides change from

Question 45 of 50

The pH of 0.005 mol/dm³ H₂SO₄ (fully ionised) is

Question 46 of 50

25.0 cm³ of Na₂CO₃ solution needs 20.0 cm³ of 0.1 mol/dm³ HCl for complete reaction. The concentration of Na₂CO₃ is

Question 47 of 50

Balance: Cr₂O₇²⁻ + Fe²⁺ → Cr³⁺ + Fe³⁺ (acid). The mole ratio Cr₂O₇²⁻ : Fe²⁺ is

Question 48 of 50

Zinc is not usually regarded as a transition element because

Question 49 of 50

Amides are formed from carboxylic acids and

Question 50 of 50

The repeating unit of poly(propene) is