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Q9 Potatoes grow well on Ram’s farm which has with pH of 5.5. Now he 1

wants to grow broccoli instead of potato in the same farm. Suggest him
a method to do so.

Q10 What is the name and formula of the hardest substance of the body ? 1

Concept _Salts

Q1. How is a salt prepared? 1

Q2 Write the formulae of the bases and acids from which sodium acetate and sodium 1
formate are formed?

Q3 What is the nature of the salt prepared from potassium hydroxide and sulphuric 1
acid?

Q4 What is a brine solution? 1

Q5 Name the sodium salt that is used for removing permanent hardness of water. 1

Q6. Mention the colours of anhydrous copper sulphate and ferrous sulphate crystals. 1

Q7. What is the commercial name of calcium sulphate hemihydrate? 1

Q8 Write the formulae of caustic soda and caustic potash. 1

Q9 What is the nature of the salt prepared from calcium hydroxide and acetic acid? 1

Q10 Name the acid present in baking powder. 1

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