Acids and Alkalis (SPE Questions)

A science teacher told Kassim that hand washing liquid is alkaline. Kassim poured the hand washing liquid in a beaker and carried out tests on it. Which of the following tests confirms his teacher’s statement?

• The soap has no effect on wet red litmus paper.

• The soap turns blue litmus paper red.

• The soap turns blue litmus paper pink.

• The soap turns red litmus paper blue.

• A

• B

• C

• D

Which of the statements about pH is true?

• At pH 1, the solution is a strong alkali.

• At pH 6, the solution is a strong acid.

• At pH 7, the solution is neutral.

• At pH 14, the solution is a weak acid.

• A

• B

• C

• D

• A

• B

• C

• D

• Red

• Yellow

• Purple

• Colourless

• A

• B

• C

• D

• pH 3

• pH 7

• pH 9

• pH 11

• (i), (ii), (iii), (iv)

• (ii), (iii), (iv), (i)

• (ii), (iii), (i), (iv)

• (iii), (i), (ii), (iv)

• A

• B

• C

• D