FREE AND STUDY GAMES ABOUT IGCSE CHEMISTRY EXAM

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FREE AND STUDY GAMES ABOUT IGCSE CHEMISTRY EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -48 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Ethanol is manufactured from petroleum by reacting ethene with steam. Name three statement.

Answer:

• Ethene is obtained from the cracking of alkanes.
• The reaction is an addition reaction.
• The rate of reaction is increased by a catalyst.

Question 2: The list gives the names of four organic compounds. ethane

ethanoic acid ethanol ethene Which bond do all four compounds contain?

Answer:

C-H Question 3: Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns.What is the correct order?

Answer:

Methane to Ethene

Question 4: Name one statement about alkane molecules

Answer:

They burn in oxygen

Question 5: Compound Q decolourises bromine water.

Compound Q has two carbon atoms in each molecule. Name one statement about compound Q.

Answer:

It is produced by cracking alkanes

Question 6: Ethanol can be formed by......

Answer:

• Fermentation
• Reaction between steam and ethene

• Catalytic addition of steam to ethene

Question 7: Which term describes the formation of ethanol from glucose?

Answer:

Fermentation

Question 8: Ethene reacts with Y to produce ethanol.

ethene + Y ? ethanol What is Y?

Answer:

Steam

Question 9: Name two statement about alkanes

Answer:

They form carbon dioxide and water on combustion They are saturated.

Question 10: Name three statement about carboxylic acids?

Answer:

• Aqueous ethanoic acid has a pH below pH 7.
• They contain the functional group -COOH.
• They produce carbon dioxide when reacted with a metal carbonate.

Question 11: Show the equation represents incomplete combustion of ethane

Answer:

2C2H6 + 5O2 ? 4CO + 6H2O

Question 12: Which hydrocarbon reacts with steam to produce ethanol?

Answer:

C2H4

Question 13: Describes the four production of ethanol and its properties?

Answer:

• Can be made from Glucose

• Can be made from ethene

• Is used as a fuel

• Is used as a solvent

Question 14: What is used in the production of ethanol from ethene?

Answer:

Steam

Question 15: Name three statements of molecule of an organic

Answer:

• A solution of W in water reacts with sodium hydroxide solution.
• When copper(II) carbonate is added to a solution of W in water, a gas is produced.
• When magnesium is added to a solution of W in water, a gas is produced

Question 16: A hydrocarbon W burns to form carbon dioxide and water.

W decolourises bromine water.What is the name of W

Answer:

Ethene

Question 17: Name one statement about ethanol?

Answer:

It is the only product when ethene reacts with steam.

Question 18: Name two products would decolourise bromine water?

Answer:

1 C2H4

2 C3H6

Question 19: Which bond is not in a molecule of ethanoic acid?

Answer:

C=O

Question 20: Which group of compounds is part of a homologous series?

Answer:

CH3OH, C2H5OH, C3H7OH

Question 21: Ethanol is made by fermentation.

How is ethanol obtained from the fermentation mixture?

Answer:

Fractional distillation Question 22: Ethene, propene and butene are all members of the same homologous series.Which statement explains why ethene, propene and butene have similar chemical properties?

Answer:

They all have the same functional group Question 23: Organic compounds may have names ending in -ane, -ene, -ol or -oic acid.How many of these endings indicate the compounds contain double bonds in their molecules?

Answer:

2 Question 24: What is not essential for the formation of ethanol by fermentation?

Answer:

Light