Acid,base and salt
Bhoownesh Assignment---Acid base and salt
Question 1.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases
(ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same
IV Salt formation takes place
2. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(B) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid
Question 3.
Two aqueous solutions P and Q have pH of 5 and 13 respectively. The correct inference is that:
(a) solution P is of HCl and Q is of NH4OH
(b) solution P is of CH3COOH and Q is of Ca(OH)2
(c) solution P is of HNO3 and Q is of NH4OH
(d) solution P is of CH3COOH and Q is of NaOH
4. The pH of a solution is 7. How can you increase its pH?
(a) By adding a small amount of acid
(b) By adding a small amount of base.
(c) By adding a small amount of salt.
(d) By passing carbon dioxide gas through it.
5.
Which one of the following can be used as an acid-base indicator by a visually impaired student?
(a) Litmus
(b) Turmeric
(c) Vanilla essence
(d) Petunia leaves
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