Q. 9. Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them You have only a turmeric indicator.

Q. 10. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution Explain

Q.11. Consider the following statements:

(a) Both acids and bases change the colour of all indicators.

(b) If an indicator gives a colour change with an acid, it does not give a change with a base.

(c) If an indicator changes colour with a base, it does not change colour with an acid.

(d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct

(i) All four (ii) a and d (iii) b, c and d (iv) only d