Question

PLEASE ANSWER I HAVE MY BOARD EXAM TMRO
- Take about 10 mL of distilled water (or rain water) and
hard water (from a tubewell or hand-pump) in separate test
Add a couple of drops of soap solution to both.
Shake the test tubes vigorously for an equal period of time and
observe the amount of foam formed.
* In which test tube do you get more foam?
* In which test tube do you observe a white curdy precipitate​

Answer 1

Answer:

more foam in distilled water

curdy precipitate in tudewell water

Explanation:cuz tubewell water has more impurities

(best of luck for boards. i am also appearing)

Answer 2

Answer:

test tube containing distilled water more foam formed

test tube containing hard water precipitate is formed

Explanation:

(soap only react with soft water)

when it react with hard water precipitate known as scum is formed