y. Answer the following questions:
1. Limestone is calcium carbonate. What
happens when it is heated?
2. Quicklime is calcium oxide. What happens
when it is placed in water?
3. Why does limewater turns milky when carbon
dioxide is blown into it?
4. Name three mineral acids.
5. Explain neutralization reaction giving suitable
example.
6. Why should we not touch and taste an acid or
an alkali?
7. What is water of crystallisation.
8. How do we obtain an anhydrous salt?
9. What are neutral salts?
10. Are all salts neutral in nature?
11. What is an antacid?
12. Give two examples of salts which are coloured
with water of crystallization and they lose
colour on losing water of crystallization.
13. list to use of
a hydrochloric acid
b nitric acid
c sulphuric acid
14 water indicators? Name some.
Answers
Answer:
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Explanation:
1)When heated, limestone (known chemically as calcium carbonate) is converted into two new substances, lime (calcium oxide) and carbon dioxide, that have very different properties from those of limestone.
2)The quick lime reaction with water is exothermic in nature due to production of heat. ... The clear solution formed after the slaked lime gets settled is also known as lime water
3)Lime water is calcium hydroxide which on passing carbon dioxide turns lime water milky due to formation of calcium carbonate.
4)sulfuric acid, hydrochloric acid and nitric acid
5)A neutralization reaction is when an acid and a base react to form water and salt and involves the combination of hydrogen ions and hydroxyl ions to generate water. example, HCl + NaOH gives you H2O + NaCl
6)We should not touch or taste Alkali because they are corrosive in nature. So it can burn skin or toungue. Alakalis are kept in separate containers with hazard warning sign to show that they are corrosive.
7) i dont know the answer
8)i dont know
9)A salt resulting from the neutralization of an acid by a base and having no acidic or basic character, especially when dissolved in water is called neutral salts.
10)No, all salts are not neutral. It may be acidic salt, basic salt or neutral salt. Acidic salt