2020 A-Level H2 Chemistry Paper 1 — All Solutions

The shape of each p-orbital is represented as two lobes. How many 3d orbitals have four lobes?…

Use of the Data Booklet is relevant to this question. The table shows the fifth, sixth, seventh, eighth and ninth ioni…

Use of the Data Booklet is relevant to this question. An unstable ion has • a nucleon number of 217, • 50 more neutro…

The table shows the boiling points of three alkanes. What is responsible for the differences in boiling points?…

Equimolar amounts of the liquids trichloromethane, \(\text{CHCl}_3\), and propanone, \(\text{CH}_3\text{COCH}_3\), are m…

Use of the Data Booklet is relevant to this question. The volumes and pressures of equal masses of four gases, \(\text{…

0.040 mol of \(\text{HI(g)}\) is placed in a sealed vessel and allowed to reach equilibrium, at a pressure of 1.0 atm. …

Which factor contributes to \(\text{MgCO}_3\) decomposing at a lower temperature than \(\text{CaCO}_3\)?…

1.00 g of boron carbide completely oxidises to form 2.50 g of boron oxide, \(\text{B}_2\text{O}_3\), and 0.80 g of carbo…

The reaction of iodine with propanone in the presence of aqueous acid is zero order with respect to iodine. Which diagr…

Changes in temperature can affect the spontaneity of a reaction. Which statements are correct? 1 If a reaction is en…

Acidified potassium manganate(VII) oxidises ethanedioic acid to carbon dioxide. \(2\text{MnO}_4^- + 16\text{H}^+ + 5\te…

Hydrogen peroxide solution decomposes. The equation for this reaction is shown. \( 2\text{H}_2\text{O}_2(aq) \rightar…

The equation for a reaction is shown. \(\text{P} + \text{Q} \rightleftharpoons \text{R} + 2\text{S}\) Substances P, …

When an acid is titrated with a strong base, an equivalence point is reached when the amount of base added is equal to t…

The reaction pathway for cyanohydrin formation from propanone is shown. Which conclusion can be drawn from the reactio…

Which statement is correct to describe constitutional isomers?…

Androstenolone is a steroid secreted by the adrenal cortex. When it is treated with cold \(\text{KMnO}_4\), it gives a…

When dichlorodifluoromethane, \(\text{CCl}_2\text{F}_2\), is released into the atmosphere, it accumulates in the upper p…

Exhaust fumes from car engines contain the gases carbon dioxide, nitrogen oxides and unburnt hydrocarbons. Use of a ca…

Which compound is least reactive with a few drops of ethanolic silver nitrate under the same conditions?…

Compound V, \(\text{C}_5\text{H}_8\text{O}_2\), is reduced to form compound W, \(\text{C}_5\text{H}_{12}\text{O}_2\). …

Compound T has the molecular formula \(\text{C}_x\text{H}_y\text{O}_z\). It is tested with various reagents and gives th…

Ethylamine, \(\text{C}_2\text{H}_5\text{NH}_2\), and diethylamine, \((\text{C}_2\text{H}_5)_2\text{NH}\), both behave as…

The compound \(\text{C}_3\text{H}_7\text{CONH}_2\) is an amide. Which statement about this amide is correct?…

Compound X has been used as a painkiller. When X is reacted with cold NaOH(aq), which groups will react? 1) the alco…

Use of the Data Booklet is relevant to this question. A hydrogen-oxygen fuel cell is shown.…

Use of the Data Booklet is relevant to this question. A current of 20.0 A flows through a dilute solution of sulfuric …

Which diagram correctly shows the arrangement of the six coordinate bonds in a regular octahedral complex of ruthenium?…

Use of the Data Booklet is relevant to this question. The table shows some physical properties of metals. One row of…