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NECO SSCE Chemistry 2014 past questions and answers

This 2014 NECO SSCE Chemistry set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2014 set with instant marking.

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Sample NECO SSCE Chemistry 2014 questions

1. Which repeating unit is formed when many ethene molecules undergo addition polymerization?
  1. -CH2-CH2-CH2-
  2. -CH=CH-
  3. -CH2-CH2-
  4. -CH3-CH3-

Answer: C. -CH2-CH2-

Opening the C=C bond in ethene allows each molecule to link through a -CH2-CH2- repeating unit.

2. What are the products when ethanol reacts with butanoic acid in the presence of concentrated sulfuric acid?
  1. Ethyl butanoate and water
  2. Methyl butanoate and hydrogen
  3. Butanone and water
  4. Ethene and carbon dioxide

Answer: A. Ethyl butanoate and water

Ethanol and butanoic acid undergo esterification to form ethyl butanoate and water.

3. Which observation distinguishes ethene from ethane when each gas is bubbled through bromine water in the absence of light?
  1. Ethene turns the solution blue
  2. Ethene decolourizes the bromine water
  3. Ethane forms a white precipitate
  4. Ethane turns the solution milky

Answer: B. Ethene decolourizes the bromine water

Ethene adds bromine across its double bond and decolourizes bromine water, whereas ethane does not under these conditions.

4. Which functional group is present in ethanol, CH3CH2OH?
  1. Carboxyl, -COOH
  2. Aldehyde, -CHO
  3. Ester, -COO-
  4. Hydroxyl, -OH

Answer: D. Hydroxyl, -OH

Ethanol is an alcohol, and its characteristic functional group is hydroxyl, -OH.

5. Propan-1-ol and propan-2-ol have the same molecular formula, C3H8O, but differ in the position of the hydroxyl group; what is this relationship called?
  1. Geometrical isomerism
  2. Position isomerism
  3. Optical activity
  4. Polymerization

Answer: B. Position isomerism

The two alcohols differ only in the position of the -OH group on the carbon chain, so they are position isomers.

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