Acids, Bases & Salts

Acids, Bases and Salts Worksheet-4

1. Neha was performing an experiment bare handed. After the experiment was over, she realised that her palms became slippery and slimy. What do you think is the reason for it?

(A) She must have dropped NaOH on her hands

(B) She must have dropped H₂SO₄ on her hands

(C) She must have dropped NaCl on her hands

(D) None of these

2. Ravi took a paper blotted with solution X. He dipped the paper in lime water and observed that the colour of lime water turned brownish red. What do you think the paper was blotted with?

(A) Red litmus solution

(B) Methyl red solution

(C) Turmeric solution

Acids, Bases and Salts Worksheet-5

1. A certain solution, when added dropwise to phenolphthalein solution, gives a pink colour. What do you infer about its pH?

(A) pH > 7

(B) pH = 7

(C) pH > 7

(D) None of these

2. How do you think a soil should be treated, to which excessive chemical fertilizers have been added?

(A) Such a soil can be treated by adding base

(B) Such a soil can be treated by adding CaO

(C) Such a soil can be treated by adding Ca(OH)₂

(D) All of these