WINNERS RULE THE WORLD
1.What is the taste of acids?
Sour
2.What is the taste of bases?
Bitter
3. When do we suffer from a problem of acidity?
We suffer from a problem of acidity after overeating.
4. What do you suggest as a remedy when someone suffers from a problem of acidity after overeating?
We suggest to drink backing soda solution as a remedy when someone suffers from a problem of acidity after overeating .
5. Why do you suggest to have baking soda solution when someone suffers from a problem of acidity after overeating?
Because backing soda solution is basic in nature and it has a nullifying effect on acidity or acids.
6. What happens to blue litmus paper when dipped in acids?
Acids change the colour of blue litmus paper to red.
7. What happens to red litmus paper when dipped in bases?
Bases change the colour of red litmus paper to blue.
8. Give examples for natural indicators.
Litmus and turmeric. 9. What is the nature of soap so far as it's pH is concerned?
Basic
10. Which colour does a stain of curry on white cloth become when soap is rubbed on it? Why?
Reddish brown, because soap is basic in nature.
11. What are acids?
12. What are bases?
13. Give 3 examples for inorganic acids.
14. Write the molecular formula of Hydrochloric acid.
15. Write the molecular formula of Sulphuric acid.
16. Write the molecular formula of Nitric acid.
17. What are alkalis?
Bases which are soluble in water are called alkalis.
18. Give examples for alkalis.
19. What is the molecular formula of calcium carbonate?
CaCO3
20. Name different forms of calcium carbonate.
Limestone, chalk and marble.
21. Give examples for synthetic indicators.
phenolphthalein, methyl orange.
22. Molecular formula of Plaster of Paris.
CaSO4. 1/2 H2O
23. Molecular formula of bleaching powder is
CaOCl2
24. What is the molecular formula of washing soda?
Na2CO3.10H2O
25. What is the molecular formula of Gypsum?
CaSO4.2H2O
26. What is the molecular formula of slaked lime?
Ca(OH)2
27. What is the molecular formula of quick lime?
CaO
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