Question

(a) Five solutions A, B, C, D and B when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. Which solutions is :
(i) Neutral (ii) Strongly alkaline
(iii) Strongly acidic (iv) Wealdy acidic
(v) Wealdy alkaline
Arrange the solutions in increasing order of 1-1* ion concentration
(b) Name the acid and base from which the following salts have been formed.
(i) Sodium acetate (ii) Ammonium chloride


CBSE Class X Science LA (5 Marks)

Answer 1

(a) (i) Solution D
(ii) Solution C
(iii) Solution B
(iv) Solution A
 (v) Solution E Increasing order C, E, D, A, B  

(b) (i) Acid — CH3COOH (Acetic acid) Base — NaOH (Sodium hydroxide) (ii) Acid — HCl (Hydrochloric acid) Base — NH4OH (Ammonium hydroxide)

Answer 2

Answer:

(a) (i) Solution D

(ii) Solution C

(iii) Solution B

(iv) Solution A

 (v) Solution E Increasing order C, E, D, A, B  

(b) (i) Acid — CH3COOH (Acetic acid) Base — NaOH (Sodium hydroxide) (ii) Acid — HCl (Hydrochloric acid) Base — NH4OH (Ammonium hydroxide)