IS_Unit9_Checkpoint 9.2_E

1(a) The degree of acidity or alkalinity of a solution can be determined by using litmus paper.

• True

• False

1(b) pH paper is prepared by soaking strips of filter paper in litmus solution and drying them before use.

• True

• False

1(c) Acidic solutions always have a pH value lower than 7.

• True

• False

2(a) Fill in the blanks.

• indicators

• acid

• alkali

• pigments

2(b) Fill in the blanks.

• (i) red, (ii) blue

• (i) blue, (ii) red

• (i) green, (ii) yellow

• (i) yellow, (ii) green

2(c) Fill in the blanks.

• (i) red, (ii) blue

• (i) blue, (ii) red

• (i) green, (ii) yellow

• (i) yellow, (ii) green

2(d) Fill in the blanks.

• acidic

• alkaline

• neutral

3(a)(i) Which of the following solutions is/are acidic?

• A only

• A and B only

• A and E only

• B and E only

3(a)(ii) Which of the following solutions is/are alkaline?

• C only

• C and D only

• C and E only

• D and E only

3(a)(iii) Which of the following solutions is/are neutral?

• A only

• B only

• B and C only

• C and D only