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0620_s22_qp_21-Abigail

Question

Which two gases will diffuse at the same rate, at the same temperature?

  1. carbon monoxide and carbon dioxide
  2. carbon monoxide and nitrogen
  3. chlorine and fluorine
  4. nitrogen and oxygen
Answer/Explanation

Ans:

B

Question

 A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm3 of dilute sulfuric acid.

Which apparatus is essential to complete the experiment?

  1. stop-clock
  2. measuring cylinder
  3. thermometer
  4. balance

A 1, 2 and 4               B 1 and 2 only                C 1 and 4 only                D 2, 3 and 4

Answer/Explanation

Ans:

A

Question

 The numbers of protons and neutrons and the electronic structures of four particles, W, X, Y and Z, are shown.

Which particles have the same chemical properties?

A W and Y               B W and Z                C X and Y                D X and Z

Answer/Explanation

Ans:

C

Question

 Which substance should be pure for the intended use?

  1. a drug for curing disease
  2. limestone for iron extraction
  3. petroleum for fractional distillation
  4. water for washing a car
Answer/Explanation

Ans:

A

Question

 Metals and ionic compounds have similarities and differences in their structure and properties.

Which row about metals and ionic compounds is correct?

Answer/Explanation

Ans:

A

Question

 Which diagram represents the outer-shell electron arrangement in a nitrogen molecule?

Answer/Explanation

Ans:

D

Question

The equation for the reaction between barium chloride and dilute sulfuric acid is shown.

BaCl2 + H2SO4 → BaSO4 + 2HCl

Which row shows the state symbols for this equation?

Answer/Explanation

Ans:

A

Question

The relative atomic mass, Ar, of an element is determined by comparing the mass of one atom of the element with the mass of one atom of element Q.

What is Q?

  1. carbon
  2. chlorine
  3. hydrogen
  4. oxygen
Answer/Explanation

Ans:

A

Question

 The equation for the reaction between aqueous lead(II) nitrate and aqueous sodium chloride is shown.

Pb(NO3)2(aq) + 2NaCl(aq) → PbCl2(s) + 2NaNO3(aq)

If 100 cm3 of aqueous lead(II) nitrate of concentration 0.1 mol / dm3 is reacted with an excess of aqueous sodium chloride, which mass of lead(II) chloride is obtained?

A 1.16 g               B 2.42 g                C 2.78 g                D 3.31 g

Answer/Explanation

Ans:

C

Question

The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes.

At which electrodes is hydrogen produced?

  1. electrode 1 only
  2. electrodes 1 and 3
  3. electrode 2 only
  4. electrodes 2 and 4
Answer/Explanation

Ans:

D

Question

 Aqueous copper(II) sulfate is electrolyzed using copper electrodes.

What is the ionic half-equation for the reaction at the cathode?

  1. Cu → Cu2+ + 2e–
  2. Cu2+ + 2e– → Cu
  3. 2H+ + 2e– → H2
  4. 2O2– → O2 + 4e–
Answer/Explanation

Ans:

B

Question

 Which row identifies a chemical change and a physical change?

Answer/Explanation

Ans:

B

Question

 The equation for the reaction between gaseous hydrogen and gaseous iodine to form gaseous hydrogen iodide is shown.

H2(g) + I2(g) → 2HI(g)

The reaction is exothermic.

Which statement explains why the reaction is exothermic?

  1. Energy is released when H–H and I–I bonds are broken.
  2. The bond energies of the reactants are larger than the bond energies of the products.
  3. The products are at a higher energy level than the reactants.
  4. More energy is released when two HI bonds are formed than is used when the H–H and I–I bonds are broken.
Answer/Explanation

Ans:

D

Question

Acidified aqueous silver nitrate is added to a test-tube containing aqueous chloride ions.

The test-tube is then left in direct sunlight.

Which row describes the observations and explains what happens to the reaction mixture?

Answer/Explanation

Ans:

D

Question

Water is added to anhydrous copper(II) sulfate.

What happens during the reaction?

  1. The copper(II) sulfate turns blue and the solution formed gets colder.
  2. The copper(II) sulfate turns blue and the solution formed gets hotter.
  3. The copper(II) sulfate turns white and the solution formed gets colder.
  4. The copper(II) sulfate turns white and the solution formed gets hotter.
Answer/Explanation

Ans:

B

Question

 Aqueous iron(III) chloride, FeCl3, reacts with aqueous potassium iodide, KI.

vFeCl3 + wKI → xFeCl2 + yKCl + I2

Which statements are correct?

  1. In the balanced equation, v, w, x and y have the same value.
  2. Potassium iodide is an oxidizing agent.
  3. A dark brown solution is produced in the reaction.

A 1 and 2 only               B 1 and 3 only                C 2 and 3 only                D 1, 2 and 3

Answer/Explanation

Ans:

B

Question

Which statement about acids is correct?

  1. A strong acid has a higher pH than a weak acid of the same concentration.
  2. A strong acid is a proton acceptor.
  3. A weak acid is a proton donor.
  4. A weak acid is fully ionized in aqueous solution.
Answer/Explanation

Ans:

C

Question

 The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested.

Which information about X and Y is correct?

Answer/Explanation

Ans:

B

Question

An acid is neutralized by adding an excess of an insoluble solid base.

A soluble salt is formed.

How is the pure salt obtained from the reaction mixture?

  1. crystallization → evaporation → filtration
  2. evaporation → crystallization → filtration
  3. filtration → crystallization → evaporation
  4. filtration → evaporation → crystallization
Answer/Explanation

Ans:

D

Question

 The electronic structure of element Z is 2,8,1.

Which statements about Z are correct?

  1. It is a metal.
  2. It has two outer-shell electrons.
  3. It is in Period 3.

A 1, 2 and 3               B 1 and 2 only                C 1 and 3 only                D 2 only

Answer/Explanation

Ans:

C

Question

 Elements in Group IV of the Periodic Table are shown.

carbon
silicon
germanium
tin
lead

What does not occur in Group IV as it is descended?

  1. The proton number of the elements increases.
  2. The elements become more metallic.
  3. The elements have more electrons in their outer shell.
  4. The elements have more electron shells.
Answer/Explanation

Ans:

C

Question

 Element M forms both M+ and M2+ ions.

In which part of the Periodic Table is M placed?

  1. Group I
  2. Group II
  3. Group III
  4. transition elements
Answer/Explanation

Ans:

D

Question

 In the extraction of aluminum by electrolysis, cryolite is added to the bauxite ore.

Which row describes the role of cryolite and gives the ionic half-equation at the cathode?

Answer/Explanation

Ans:

C

Question

 Mild steel is galvanized to prevent corrosion of the iron.

Which statements about galvanizing are correct?

  1. Galvanizing prevents corrosion because the zinc forms an alloy.
  2. If the coating is damaged, water and oxygen do not corrode the iron.
  3. Zinc is a sacrificial metal and corrodes in preference to iron.

A 1 and 2                B 1 and 3                 C 2 only                D 2 and 3

Answer/Explanation

Ans:

D

Question

Which diagram represents the arrangement of the outer-shell electrons of a noble gas?

Answer/Explanation

Ans:

A

Question

Which statements about the general properties of metals are correct?

  1. They are good conductors of heat and electricity.
  2. They have low melting points.
  3. They react with dilute acids to form a salt and water.
  4. They react with oxygen to form basic oxides.

A 1 and 2                B 1 and 4                C 2 and 3                 D 3 and 4

Answer/Explanation

Ans:

B

Question

 Reactions of three metals and their oxides are shown.

What is the order of reactivity of these metals, from most reactive to least reactive?
A 1 → 2 → 3               B 1 → 3 → 2                C 2 → 1 → 3                D 2 → 3 → 1

Answer/Explanation

Ans:

C

Question

 Three metal compounds, J, K and L, are heated using a Bunsen burner.

The results are shown.

J colourless gas produced, which relights a glowing splint

K colourless gas produced, which turns limewater milky

L no reaction

Which row identifies J, K and L?

Answer/Explanation

Ans:

C

Question

 The diagram shows the uses and treatment processes of muddy river water.

Which row identifies uses 1 and 2 and processes 1 and 2?

Answer/Explanation

Ans:

D

Question

 The equation for the manufacture of ammonia in the Haber process is shown.

\(3H_{2}(g) + N_{2}(g)\rightleftharpoons 2NH_{3}(g)\)

The forward reaction is exothermic.

Which row describes the effect of the stated change on the reaction rate and the yield of ammonia?

Answer/Explanation

Ans:

B

Question

Fertilizers are used to provide three of the elements needed for plant growth.

Which two compounds would give a fertilizer containing all three of these elements?

  1. Ca(NO3)2 and (NH4)2SO4
  2. Ca(NO3)2 and (NH4)3PO4
  3. KNO3 and (NH4)2SO4
  4. KNO3 and (NH4)3PO4
Answer/Explanation

Ans:

D

Question

The flow chart shows part of the process for the manufacture of sulfuric acid and its electrolysis.

What are gases 1, 2 and 3?

Answer/Explanation

Ans:

B

Question

 Which statements about sulfur dioxide are correct?

  1. Sulfur dioxide decolourises acidified potassium manganate(VII).
  2. Sulfur dioxide forms when acids react with carbonates.
  3. Sulfur dioxide is used as a bleach.
  4. Sulfur dioxide is used to treat acidic soil.

A 1 and 3               B 1 and 4                C 2 and 3                 D 2 and 4

Answer/Explanation

Ans:

A

Question .

 What are the products when limestone (calcium carbonate) is heated strongly?

  1. calcium hydroxide and carbon dioxide
  2. calcium hydroxide and carbon monoxide
  3. calcium oxide and carbon dioxide
  4. calcium oxide and carbon monoxide
Answer/Explanation

Ans:

C

Question

 The structure of ester W is shown.

Which row gives the names of ester W and the carboxylic acid and alcohol from which it is made?

Answer/Explanation

Ans:

C

Question

 Ethanol is made industrially by the fermentation of glucose or by the catalytic addition of steam to ethene.

Which statement describes an advantage of fermentation compared to catalytic addition?

  1. Ethanol is the only product of fermentation.
  2. Fermentation uses a batch process but catalytic addition is continuous.
  3. Fermentation uses a higher temperature than catalytic addition.
  4. Fermentation uses a renewable resource.
Answer/Explanation

Ans:

D

Question

 Some properties of colourless liquid L are listed.

  • It boils at 65°C.
  • When added to water, two layers form which do not mix.
  • It does not react with sodium carbonate.
  • It has no effect on bromine water.

What is L?

  1. ethanol
  2. hexane
  3. hexene
  4. ethanoic acid
Answer/Explanation

Ans:

B

Question

 A molecule of compound P contains two carbon atoms and four hydrogen atoms.

Which row represents P?

Answer/Explanation

Ans:

C

Question

 The reaction of ethanol with acidified potassium manganate(VII) is shown.

\(CH_{3}CH_{2}OH\xrightarrow[H^{+}]{KMnO_{4}}CH_{3}COOH\)

Which type of reaction is taking place?

  1. addition
  2. condensation
  3. hydrolysis
  4. oxidation
Answer/Explanation

Ans:

D

Question

 Which polymer is a synthetic polyamide?

  1. nylon
  2. poly(ethene)
  3. protein
  4. Terylene
Answer/Explanation

Ans:

A

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