35. Match the following: (a) Silica (i) Caustic potash (b) Potassium (i) Sand ii) hydroxide (0) Sodium (iii) Calamine hydroxide (d) Zinc d (iv) Caustic soda
Answers
Answer:
Chemical name of caustic soda is sodium hydroxide. Formula: NaOH
It is an alkali and has several uses. It is used in manufacture of everyday products like: paper, aluminium, drain cleaners, soap and detergents.
Chemical name of washing soda is sodium carbonate decahydrate. Formula: Na2CO3, 10H2O
As the name suggests washing soda is commonly used in detergents. It is also used in treatment of hard water.
Chemical name of of the main component of limestone is Calcium carbonate. Formula: CaCO3
Limestone is a popular building material. It is also used in purification of iron in blast furnaces. It is also used in manufacture of glass and cement.
Soda lime is a mixture of Sodium hydroxide and potassium or sodium hydroxide. Chemical formula: CaHNaO2
Soda lime has a unique ability to absorb moisture from air. It also absorbs carbon dioxide from air. Hence it is used in manufacture of gas masks.
Explanation:
your answer
Answer:
1 : b
2 :a
3:d
4:c
Explanation:
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