Question

10. How is the pH of a solution of a base milde
11. Arrange the following in increasing order of their pH values:
NaOH solution, Blood, Lemon juice
12. Name the gas evolved, when dilute sulphuric acid acts on sodium carbonate.
13. What is the colour of methyl orange in baking soda solution?
14. Name the metals soluble in aqua regia.
15. Why does HCl(g) does not conduct electricity when dissolved in toluene?
16. Which chemical is present in enamel?
17. Why does tooth decay occurs?
18. What changes will take place in the pH of an acid, if you will go on adding alkali to it?
19. A solution turns red litmus blue, its pH is likely to be: (a) 1, (6) 4, (c) 5, (d) 10.
20. A solution X’ reacts with crushed egg shells to give a gas which turns lime water milky.
The solution contains: (a) NaCl, (6) HCI, (c) Lici, (d) KCI.

21. 10 mL of a solution of NaOH found to be completely neutralised by 8 mL of given solution
of HCl. If we take 20 mL of same solution of NaOH, the amount of HCl solution (the sam
solution as before) required to neutralise it, will be: (a) 4 ml, (b) 8 ml, (c) 12 ml, (d) 16 ml

22. Which one of the following types of medicines is used for treating indigestion? (a) Antibioti
(6) Analgesic, (c) Antacid, (d) Antiseptic
​

Answer 1

Answer:

antacids help in indigestion