Bihar TET · Mathematics and Science (Paper II)
Properties of acids, bases, salts and pH scale.
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Q1 · Acids, Bases and Salts · EASY
A student tested four solutions with blue litmus paper. In which of the following solutions will the blue litmus paper turn red?
Q2 · Acids, Bases and Salts · HARD
The pH value of a solution is 3. If the pH is increased to 6, the concentration of hydrogen ions (H+) in the solution will:
Q3 · Acids, Bases and Salts · EASY
When dilute hydrochloric acid is added to zinc granules, which of the following gases is evolved?
Q4 · Acids, Bases and Salts · MEDIUM
A student mixed sodium hydroxide solution with hydrochloric acid in a beaker and found that the beaker became warm. He then tested the final solution with red and blue litmus paper, and found that neither paper changed colour. What can be concluded about the reaction?
Q5 · Acids, Bases and Salts · HARD
A student tested four solutions with litmus paper. Solution X turned blue litmus red, Solution Y turned red litmus blue, Solution Z showed no change with either litmus, and Solution W turned both litmus papers red. Which solution is neutral?