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Science Distinguish Between.

Substances in Common Use · Maharashtra Board STD 9 (MSBSHSE - Semi English Medium). 2 questions.

Questions

Distinguish Between.

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2 questions · self-marked practice — reveal the answer and mark yourself.

Question 13 Marks
Bathing soap and Washing soap
Answer
Bathing soapWashing soap
(i) High-grade fats and oils are used as the raw material.(i) Low-grade fats and oils are used as the raw material.
(ii) Expensive perfumes added.(ii) Cheaper perfumes added.
(iii) No free alkali content present to prevent injuries to skin.(iii) Free alkali present for cleaning action.
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Question 23 Marks
Washing soda and Baking soda
Answer
Washing soda Baking soda
(i) Chemical name is sodium carbonate. (i) Chemical name is sodium bicarbonate or sodium hydrogen carbonate.
(ii) Its molecular formula is $Na_2CO_3.10H_2O$ (ii) Its molecular formula is $NaHCO_3$
(iii) It is a crystalline substance. (iii) It is an amorphous powder.
(iv) It is used in manufacturing soaps and detergents. (iv) It is used in bakery for making cakes and bread lighter and spongy.
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Distinguish Between. - Science STD 9 Questions - Vidyadip