18.What is correct for following ? (i) Lemon Juice (ii) Solution of washing soda(iii) Toothphaste (iv) Gastric Juices(v) Vinegar
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Substances having pH values above 7: Solution of washing soda and toothpaste. They will turn red litmus paper blue due to their basic nature.
Substances having pH values less than 7: Lemon juice, vinegar and stomach juices. They will turn blue litmus paper red due to their acidic nature.
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iv, v are acids and ii, iii are bases
ii, iii are acids and
, iv, v are bases
, iii, iv, v are acids and ii is a base
, ii , iii are acids and iv , v are bases
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A
Solution :
Lemon Juice contains citric acid . Stomach Juice contains
, vinegar contains
. Washing soda solution and tooth paste are basic.
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