REET · Mathematics and Science (Level 2)
Acids, bases, salts and chemicals in daily life.
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Q1 · Chemical Substances · EASY
A student tested four colourless liquids with red litmus paper and blue litmus paper. Which of the following observations indicates that the liquid is a base?
Q2 · Chemical Substances · MEDIUM
A farmer noticed that his soil was too acidic for growing certain crops. His friend suggested adding a substance to neutralise the acidity. Which of the following substances would be most suitable for this purpose?
Q3 · Chemical Substances · HARD
Three students prepared salt solutions by neutralising acids with bases. Student 1 mixed hydrochloric acid with sodium hydroxide. Student 2 mixed sulphuric acid with potassium hydroxide. Student 3 mixed nitric acid with calcium hydroxide. If all reactions went to completion with correct stoichiometric amounts, which statement about the salts formed is correct?