a) What is universal indicator .
b) What is the chemical equation involved in the preparation of sodium hydroxide. Name the process.
c) Give reason for; Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric.
(i) State reasons for the following statements:
(a) Tap water conducts electricity, whereas distilled water does not.
(b) During the summer season, a milkman usually adds a very small amount of baking soda to fresh milk.
(c) For dilution of acid, acid is added into water and not water into acid.
(d) Dry hydrogen chloride gas does not turn blue litmus red whereas dilute hydrochloric acid does.
(ii) How is Bleaching powder prepared? Give its important uses?