Ce Mc Assertion
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Multiple Choice Questions: HKCEE Past Paper (Assertion Reason Questions) P.1
For the following, part of the questions have been modified to suite the present syllabus. Furthermore, you may not know the answers for questions with *. Directions:
A. B. C. D.
Each question below consists of two separate statements. Decide whether each of the two statements is true or false; if both are true, then decide whether or not the second statement is a correct explanation of the first statement. Then select one option from A to D according to the following table:
Both statements are true and the 2nd statement is a correct explanation of the 1st statement. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement. The 1st statement is false and the 2nd statement is true. Both statements are false.
1st statement 1986 32.
2nd statement
A coloured crystal must be an ionic compound.
All coloured crystals contain metal ions.
33.
Both pure hydrogen chloride and pure lead(II) bromide can conduct electricity.
They are both electrolytes.
34*.
Dipping aluminium foil into nitric acid for a brief period can protect the metal from corrosion.
An oxide layer is formed on the surface of the aluminium foil when it is dipped into nitric acid.
35.
Sulphur dioxide can be used as a food preservative.
It is a mild bleaching agent.
Nitrogen reacts readily with other elements or compounds.
The outermost electron shell of the nitrogen atom is incompletely filled.
33.
In ammonia, the mass of nitrogen is three times that of hydrogen.
For every nitrogen atom present in the ammonia molecule there are three hydrogen atoms.
34.
The bleaching action of sulphur dioxide is permanent.
Sulphur dioxide bleaches by reduction.
36.
Cracking is not an important process in the Cracking cannot separate the light petroleum industry. fractions of crude oil from the heavy fractions.
37.
Alkanols can turn red litmus blue.
Alkanols contain the -OH group.
Potassium iodide solution turns brown on adding chlorine water.
The iodide ions are reduced by chlorine to give iodine.
33.
Concentrated sulphuric acid can char a piece of cloth.
Concentrated sulphuric acid is highly corrosive.
34.*
Hydrolysis of an ester is usually carried out in an acidic medium.
The reaction is reversible in an acidic medium.
Graphite is a rather soft substance.
All the bonds between the carbon atoms in graphite are weak.
During electrolysis, reduction occurs at the cathode.
Cations gain electrons at the cathode.
1987 32.
1988 32.
1989 28. 29.
Multiple Choice Questions: HKCEE Past Paper (Assertion Reason Questions) P.2
30.
Magnesium is a stronger oxidizing agent than sodium.
Mg2+(aq) accepts electrons more readily than Na+(aq).
31.*
Bromine water can be readily decolorized by shaking with ethene, but not with ethane.
Each ethane molecule contains a higher percentage by mass of hydrogen than each ethene molecule.
32.
When nylon is heated, ammonia is given off.
In the nylon molecule, nitrogen and hydrogen atoms are in a ratio of 1:3.
Magnesium chloride solution gives a white precipitate with lead(II) nitrate solution.
Magnesium is higher than lead in the metal reactivity series.
46.
A solution of dry hydrogen chloride in methylbenzene turns blue litmus paper red.
Gaseous hydrogen chloride contains hydrogen ions.
47.
The bleaching action of sulphur dioxide is not permanent.
Sulphur dioxide reacts with water to form a weak acid.
49.
Sea water can corrode ships more quickly than fresh water.
Sodium chloride in sea water speeds up the corrosion of iron.
Distilled water is a poor conductor of electricity.
Distilled water contains an equal number of H+(aq) ions and OH-(aq) ions.
48.
Hydrogen chloride can be prepared by the action of concentrated nitric acid on solid sodium chloride.
Concentrated nitric acid is a non-volatile acid.
49.
In the preparation of soap, sodium chloride is added after the reaction between oil and sodium hydroxide has been completed.
Sodium chloride can increase the solubility of soap.
50.
Magnesium oxide dissolves faster in 1 M hydrochloric than in 1 M ethanoic acid.
Hydrochloric acid is a stronger acid than ethanoic acid.
Both zinc and molten sodium chloride conduct electricity.
Both zinc and molten sodium chloride contain mobile ions.
46.
Sulphur dioxide is an oxidizing agent.
Sulphur dioxide can decolorize bromine water.
47.
Polyester is a thermoplastic.
Polyester is formed by condensation polymerization.
49.
A solution of hydrogen chloride in methylbenzene can turn blue litmus paper red.
Hydrogen chloride dissolves in methylbenzene to form hydrogen ions.
50.
When concentrated sulphuric acid is poured onto a piece of cotton cloth, the piece of cloth becomes charred.
Concentrated sulphuric acid is a strong oxidizing agent.
1990 45.
1991 47.
1992 45.
1993 45.* 47.
Concentrated sulphuric acid can be used to Sulphuric acid is more volatile than prepare hydrochloric acid. hydrochloric acid. A flash of lightning causes nitrogen
Lightning provides sufficient energy for
Multiple Choice Questions: HKCEE Past Paper (Assertion Reason Questions) P.3
monoxide to be formed in the air.
nitrogen to react with oxygen in the air.
When car exhaust gases are bubbled into citrated blood, the coloured of the blood gradually becomes cherry red.
Nitrogen dioxide is present in car exhaust gases.
Hydrogen chloride has a lower melting point than sodium chloride.
In each molecule of hydrogen chloride, a hydrogen atom and a chlorine atom are joined together by a covalent bond.
47.
At room temperature and pressure, the molar volume of oxygen gas is greater than that of hydrogen gas.
The relative atomic mass of oxygen is greater than that of hydrogen.
49.
Iron reacts with chlorine to form iron(II) chloride.
Iron is a reducing agent in this reaction.
48.
1994 46.
Answers 8632 D 8633 C 8634 A 8635 B 8732 C 8733 C 8734 C 8736 C 8737 C
8832 C 8833 B 8834 D 8928 C 8929 A 8930 C 8931 B 8932 D
9045 B 9046 D 9047 B 9049 A 9147 B 9148 D 9149 C 9150 A
9245 C 9246 B 9247 B 9249 D 9250 B 9345 C 9347 A 9348 B
9446 B 9447 C 9449 C
For the following, part of the questions have been modified to suite the present syllabus. Furthermore, you may not know the answers for questions with *. Directions:
A. B. C. D.
Each question below consists of two separate statements. Decide whether each of the two statements is true or false; if both are true, then decide whether or not the second statement is a correct explanation of the first statement. Then select one option from A to D according to the following table:
Both statements are true and the 2nd statement is a correct explanation of the 1st statement. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement. The 1st statement is false and the 2nd statement is true. Both statements are false.
1st statement 1986 32.
2nd statement
A coloured crystal must be an ionic compound.
All coloured crystals contain metal ions.
33.
Both pure hydrogen chloride and pure lead(II) bromide can conduct electricity.
They are both electrolytes.
34*.
Dipping aluminium foil into nitric acid for a brief period can protect the metal from corrosion.
An oxide layer is formed on the surface of the aluminium foil when it is dipped into nitric acid.
35.
Sulphur dioxide can be used as a food preservative.
It is a mild bleaching agent.
Nitrogen reacts readily with other elements or compounds.
The outermost electron shell of the nitrogen atom is incompletely filled.
33.
In ammonia, the mass of nitrogen is three times that of hydrogen.
For every nitrogen atom present in the ammonia molecule there are three hydrogen atoms.
34.
The bleaching action of sulphur dioxide is permanent.
Sulphur dioxide bleaches by reduction.
36.
Cracking is not an important process in the Cracking cannot separate the light petroleum industry. fractions of crude oil from the heavy fractions.
37.
Alkanols can turn red litmus blue.
Alkanols contain the -OH group.
Potassium iodide solution turns brown on adding chlorine water.
The iodide ions are reduced by chlorine to give iodine.
33.
Concentrated sulphuric acid can char a piece of cloth.
Concentrated sulphuric acid is highly corrosive.
34.*
Hydrolysis of an ester is usually carried out in an acidic medium.
The reaction is reversible in an acidic medium.
Graphite is a rather soft substance.
All the bonds between the carbon atoms in graphite are weak.
During electrolysis, reduction occurs at the cathode.
Cations gain electrons at the cathode.
1987 32.
1988 32.
1989 28. 29.
Multiple Choice Questions: HKCEE Past Paper (Assertion Reason Questions) P.2
30.
Magnesium is a stronger oxidizing agent than sodium.
Mg2+(aq) accepts electrons more readily than Na+(aq).
31.*
Bromine water can be readily decolorized by shaking with ethene, but not with ethane.
Each ethane molecule contains a higher percentage by mass of hydrogen than each ethene molecule.
32.
When nylon is heated, ammonia is given off.
In the nylon molecule, nitrogen and hydrogen atoms are in a ratio of 1:3.
Magnesium chloride solution gives a white precipitate with lead(II) nitrate solution.
Magnesium is higher than lead in the metal reactivity series.
46.
A solution of dry hydrogen chloride in methylbenzene turns blue litmus paper red.
Gaseous hydrogen chloride contains hydrogen ions.
47.
The bleaching action of sulphur dioxide is not permanent.
Sulphur dioxide reacts with water to form a weak acid.
49.
Sea water can corrode ships more quickly than fresh water.
Sodium chloride in sea water speeds up the corrosion of iron.
Distilled water is a poor conductor of electricity.
Distilled water contains an equal number of H+(aq) ions and OH-(aq) ions.
48.
Hydrogen chloride can be prepared by the action of concentrated nitric acid on solid sodium chloride.
Concentrated nitric acid is a non-volatile acid.
49.
In the preparation of soap, sodium chloride is added after the reaction between oil and sodium hydroxide has been completed.
Sodium chloride can increase the solubility of soap.
50.
Magnesium oxide dissolves faster in 1 M hydrochloric than in 1 M ethanoic acid.
Hydrochloric acid is a stronger acid than ethanoic acid.
Both zinc and molten sodium chloride conduct electricity.
Both zinc and molten sodium chloride contain mobile ions.
46.
Sulphur dioxide is an oxidizing agent.
Sulphur dioxide can decolorize bromine water.
47.
Polyester is a thermoplastic.
Polyester is formed by condensation polymerization.
49.
A solution of hydrogen chloride in methylbenzene can turn blue litmus paper red.
Hydrogen chloride dissolves in methylbenzene to form hydrogen ions.
50.
When concentrated sulphuric acid is poured onto a piece of cotton cloth, the piece of cloth becomes charred.
Concentrated sulphuric acid is a strong oxidizing agent.
1990 45.
1991 47.
1992 45.
1993 45.* 47.
Concentrated sulphuric acid can be used to Sulphuric acid is more volatile than prepare hydrochloric acid. hydrochloric acid. A flash of lightning causes nitrogen
Lightning provides sufficient energy for
Multiple Choice Questions: HKCEE Past Paper (Assertion Reason Questions) P.3
monoxide to be formed in the air.
nitrogen to react with oxygen in the air.
When car exhaust gases are bubbled into citrated blood, the coloured of the blood gradually becomes cherry red.
Nitrogen dioxide is present in car exhaust gases.
Hydrogen chloride has a lower melting point than sodium chloride.
In each molecule of hydrogen chloride, a hydrogen atom and a chlorine atom are joined together by a covalent bond.
47.
At room temperature and pressure, the molar volume of oxygen gas is greater than that of hydrogen gas.
The relative atomic mass of oxygen is greater than that of hydrogen.
49.
Iron reacts with chlorine to form iron(II) chloride.
Iron is a reducing agent in this reaction.
48.
1994 46.
Answers 8632 D 8633 C 8634 A 8635 B 8732 C 8733 C 8734 C 8736 C 8737 C
8832 C 8833 B 8834 D 8928 C 8929 A 8930 C 8931 B 8932 D
9045 B 9046 D 9047 B 9049 A 9147 B 9148 D 9149 C 9150 A
9245 C 9246 B 9247 B 9249 D 9250 B 9345 C 9347 A 9348 B
9446 B 9447 C 9449 C
