Fill in the blanks. [3 MARKS]
(a) Lemon juice and vinegar taste _ because they contain _.
(b) When an acidic solution is mixed with a basic solution, they_ each other forming_and water.
(c) Phenolphthalein gives___colour with lime water.

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Solution

Each point: [1 Mark]

(a) Lemon juice and vinegar taste sour because they contain acids.
(b) When an acidic solution is mixed with a basic solution, they neutralize each other forming salt and water.
(c) Phenolphthalein gives pink colour with lime water.

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II. Freshly cut surfaces of metals are lustrous.
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Q. In acidic solution, phenolphthalein gives a pink colour. The basic solution containing phenolphthalein is colourless.

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A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish - orange. Which of the following would change the colour of this pH paper to greenish-blue ?

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Fill in the blanks. [3 MARKS] (a) Lemon juice and vinegar taste ___ because they contain ___. (b) When an acidic solution is mixed with a basic solution, they___ each other forming___and water. (c) Phenolphthalein gives___colour with lime water.

Each point: [1 Mark] (a) Lemon juice and vinegar taste sour because they contain acids. (b) When an acidic solution is mixed with a basic solution, they neutralize each other forming salt and water. (c) Phenolphthalein gives pink colour with lime water.

Fill in the blanks. [3 MARKS]
(a) Lemon juice and vinegar taste _ because they contain _.
(b) When an acidic solution is mixed with a basic solution, they_ each other forming_and water.
(c) Phenolphthalein gives___colour with lime water.

Each point: [1 Mark]

(a) Lemon juice and vinegar taste sour because they contain acids.
(b) When an acidic solution is mixed with a basic solution, they neutralize each other forming salt and water.
(c) Phenolphthalein gives pink colour with lime water.