MCQ-3: Summer 2022

Which change of state is an exothermic process?

In which state does 1 dm³ of methane contain the most particles?

Which dye on the chromatogram is a pure substance?

Which piece of apparatus is used to measure exactly 5.00 cm³ of a liquid?

Fermentation of sugar produces a mixture of ethanol solution and solid yeast.
How is the solid yeast removed from the mixture?

Matter exists as elements, compounds and mixtures.
Which row identifies an element, a compound and a mixture?

Which pair of statements about diamond and graphite is correct?

An isotope of chromium is represented by ⁵²₂₄Cr.
Which statement about an atom of this isotope of chromium is correct?

Sodium is in Group I of the Periodic Table and chlorine is in Group VII.
Which row describes what happens when sodium bonds ionically with chlorine?

Caesium fluoride is an ionic compound.
Which statements about caesium fluoride are correct?

1. It conducts electricity when solid.
2. It has a high melting point.
3. It is soluble in water.
4. It is highly volatile.

The structure of a molecule of a compound is shown.

What is the formula of this compound?

Calcium carbonate, CaCO₃, reacts with dilute hydrochloric acid to produce carbon dioxide.
The equation for the reaction is shown. The relative formula mass of calcium carbonate is 100.
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
10 g of calcium carbonate is reacted with an excess of dilute hydrochloric acid.
Which mass of carbon dioxide is produced?

Molten sodium chloride and concentrated aqueous sodium chloride are electrolysed using platinum electrodes.
What are the products at the negative electrode (cathode) in each electrolysis?

An object is electroplated with silver using an aqueous silver salt as the electrolyte.
Which row is correct?

Which row describes the changes that occur in an endothermic reaction?

Which statement about fuels is correct?

A sequence of changes involving sulfur is shown.

Which row describes the changes?

Magnesium is added to dilute hydrochloric acid.
25 cm³ of gas is given off in the first 30 s of the reaction.
The experiment is repeated at a lower temperature. All other reaction conditions are the same.
Which volume of gas is produced in the first 30 s of this reaction?

The equation for the reaction between magnesium and copper(II) oxide is shown.
Mg + CuO → MgO + Cu
Which substance is oxidised?

Methyl orange is added to dilute hydrochloric acid and to aqueous sodium hydroxide.
What is the colour of the methyl orange in each solution?

Compound X is dissolved in water and two separate samples of the solution are tested.
The results of the tests are shown.

What is compound X?

Which statement about the Periodic Table is correct?

Part of the Periodic Table is shown.
Which element is a soft solid that reacts violently with cold water?

Three properties of element X are listed.

• It contains atoms with a full outer shell of electrons.
• It is monoatomic.
• It is unreactive.

In which part of the Periodic Table is the element placed?

Some properties of the elements in Group VII of the Periodic Table are shown.

Which statement is correct?

Which process is used to obtain the metal calcium from its ore?

Which row links the property of a metal to its use?

The table gives some properties of an element.

Which other property does this element have?

A metal reacts vigorously with cold water.
Which statement about the metal is correct?

Which row describes the colour changes when water is added to anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate?

The gases produced by a burning fuel are passed through solution Z using the apparatus shown.
The fuel contains compounds of sulfur.

Which row identifies solution Z and the result obtained when the fuel contains compounds of sulfur?

Which information about carbon dioxide and methane is correct?

key
✔ = correct
✘ = not correct

Which row identifies uses of sulfur?

Which statements about lime are correct?

1. Lime is made by heating calcium carbonate (limestone).
2. Lime is used to desulfurise flue gases.
3. Lime is used to treat alkaline soil.
4. The chemical name for lime is calcium oxide.

Which structure is correctly named?

The fractional distillation of petroleum produces a series of fractions with different uses.
Which row identifies a use for a fraction?

Ethene and propene are both members of the same homologous series.
Which statements explain why ethene and propene have similar chemical properties?

1. They are both hydrocarbons.
2. They are both made by cracking.
3. They have the same functional group.

Which statement about ethane is correct?

Which statements about ethanol are correct?

1. Ethanol is used as a solvent.
2. Ethanol can be made directly from ethane.
3. Ethanol is a covalent compound.

Polymers are long-chain molecules made from small molecules linked together.
Four polymers or types of polymer are listed.

1. carbohydrates
2. nylon
3. proteins
4. Terylene

Which polymers or types of polymer are synthetic?