Question

i) How the hot air is lighter than cold air prove it ii)Acidic, basic,and neutral solution are given in three test tubes and you are given a strip of red litmus ? How will you identify the three solutions?
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Answer 1

Answer:

if u put red litmus in basic solution, it turns in to blue, then put into acdic solution, it turns into red .then put in to neutral there is no change on litmus paper.like