Chemistry Papers
Chemistry vacation Assignment Standard -X
1. Name a sodium compound which is used for softening hard water
2. Write the chemical name and formula of baking soda?
3. What will happen if the solution of sodium hydrogen carbonate is heated? Give the equations of the reaction involved? 4. Write the chemical name and the formula of bleaching powder.
5. Write the chemical formula of plaster of Paris?
6. What will happen if heating is not controlled while preparing plaster of Paris?
7. Write the chemical name and chemical formula of lime (quick lime)?
8. Explain the reaction involved in the slaking of lime.
9. Why is gypsum added to cement
10. What is the common name of Na2CO3.10H2O? Name a metal carbonate, which is soluble in water.
11. Name the substance obtained by the action of Cl2 gas on dry slaked lime. Write the chemical equation of the reaction.
12. How is slaked lime obtained from lime?
13. What happens when limestone is strongly heated? Write the chemical equation involved?
14. Name the constituents of Baking Powder.
15. A white chemical compound becomes hard on mixing proper quantity of water. It is used in surgery to maintain joints in a fixed position. Name this chemical compound.
16. Name a sodium compound, which is a constituent of many dry soap powders.
17. What is limewater?
18. State one use of bleaching powder, other than bleaching.
19. What is the formula of gypsum?
20. What happens when washing soda is heated above 1000C temp.?
21. Write an equation to show the reaction between plaster of Paris and water.
22. What is milk of lime?
23. Give the names of two natural indicator.
24. What is the difference between an alkali and a base?
25. Distinguish between cation and an Anion
Short answer questions (2 marks) 26. Write the chemical formula of washing soda. What happens when crystals of washing soda are
1. Name a sodium compound which is used for softening hard water
2. Write the chemical name and formula of baking soda?
3. What will happen if the solution of sodium hydrogen carbonate is heated? Give the equations of the reaction involved? 4. Write the chemical name and the formula of bleaching powder.
5. Write the chemical formula of plaster of Paris?
6. What will happen if heating is not controlled while preparing plaster of Paris?
7. Write the chemical name and chemical formula of lime (quick lime)?
8. Explain the reaction involved in the slaking of lime.
9. Why is gypsum added to cement
10. What is the common name of Na2CO3.10H2O? Name a metal carbonate, which is soluble in water.
11. Name the substance obtained by the action of Cl2 gas on dry slaked lime. Write the chemical equation of the reaction.
12. How is slaked lime obtained from lime?
13. What happens when limestone is strongly heated? Write the chemical equation involved?
14. Name the constituents of Baking Powder.
15. A white chemical compound becomes hard on mixing proper quantity of water. It is used in surgery to maintain joints in a fixed position. Name this chemical compound.
16. Name a sodium compound, which is a constituent of many dry soap powders.
17. What is limewater?
18. State one use of bleaching powder, other than bleaching.
19. What is the formula of gypsum?
20. What happens when washing soda is heated above 1000C temp.?
21. Write an equation to show the reaction between plaster of Paris and water.
22. What is milk of lime?
23. Give the names of two natural indicator.
24. What is the difference between an alkali and a base?
25. Distinguish between cation and an Anion
Short answer questions (2 marks) 26. Write the chemical formula of washing soda. What happens when crystals of washing soda are