Question

What do you observe when
(a) Iron nail is kept in copper sulphate solution for sometime.
(b) Phenolphthalein is added to sodium hydroxide solution.
(c) Blue litmus paper is dipped in dilute hydrochloric acid.
(d) Lead nitrate is heated.
(e) Magnesium ribbon is burnt in oxygen.
f) Ammonia is brought in contact with hydrogen chloride gas.​

Answer 1

when blue litmus paper is dipped in dile HCL, it will turn red due to the presence of an acid

Answer 2

Explanation:

a)the colour of the solution changes to green.

b) phenolphthalein= colourless

c)turns to red.

d)it breaks down into lead monoxide,nitrogen dioxide and hydrogen.

e)white smoke appears.

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