Slip Test 03 - Bases and pH

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) Hydrochloricacid

• A

• B

• C

• D

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

(a) (i)only

(b) (i)and(iii)

(c) (ii) and (iii)

(d) (i) and (iv)

• A

• B

• C

• D

Which of the following statements is correct about an aqueous solution of an acid and of a base?

(i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid

(iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base

(a) (i)and(iii)

(b) (ii)and(iii)

(c) (i) and (iv)

(d) (ii) and (iv)

• A

• B

• C

• D

The pH of the gastric juices released during digestion is

(a) less than 7

(b) more than 7

(c) equal to 7

(d) equal to 0

• A

• B

• C

• D

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concen- tration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained?

(a) Red

(b) Yellow

(c) Yellowish green

(d) Blue

• A

• B

• C

• D