Acids, Bases and Salts Worksheet-4

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

(D) Phenolphthalein solution

3. Match column I with column II and select the correct option from the codes given below:

                   Column I                               Column II

(a) Ammonium hydroxide         (i)   Spinach

(b) Tartaric acid                           (ii)  Window cleaner

(c) Zinc carbonate                        (iii) Tarmarind

(D) Oxalic acid                              (iv)  Calamine

(A) (a)–(ii), (b)–(iii), (c)–(iv), (d)–(i)

(B) (a)–(iv), (b)–(i), (c)–(ii), (d)–(iii)

(C) (a)–(ii), (b)–(iii), (c)–(i), (d)–(iv)

(D) (a)–(iii), (b)–(ii), (c)–(iv), (d)–(i)

4. Read the following statements:

(i)     It is a reaction between an acid and a base.

(ii)    Salt and water are produced in this reaction.

(iii)   It is an exothermic reaction.

Which reaction is being referred to?

(A) Displacement reaction

(B) Neutralization reaction

(C) Redox reaction

(D) Decomposition reaction

5. The damaging effect of acid rain is caused due to

(A) Carbonic acid                         (B) Sulphuric acid

(C) Nitric acid                               (D) All of these

6. Each cell in our body contains this acid which controls every feature of the body. This acid is

(A) RNA             (B) DNA             (C) TNA             (D) WNA

7. Observe the given figure carefully and select the correct option.

(A) A white precipitate is obtained.

(B) Effervescence is observed in test tube containing lime water.

(C) The test tube containing lime water becomes hot.

(D) Both (A) & (C)

8. X is present in the stomach. However, presence of excess of it causes indigestion, which requires the intake of milk of magnesia to undo the effect of X. What is X?

(A) HCl              (B) H₂SO₄          (C) NaOH                   (D) KOH

9. Read the given statements and select the correct option.

Statement 1: Water is neutral.

Statement 2: Water turns red litmus blue.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true and statement 2 is false.

(D) Both statements 1 and 2 are false

10. Which of the following is incorrect?

(A) Salts are formed as a result of neutralization reaction

(B) All bases are alkalies but all alkalies are not bases.

(C) Acids are corrosive in nature

(D) Excess of CO₂ in the atmosphere can cause acid rain.

Answer Key:

1. (A)
2. (C)
3. (A)
4. (B)
5. (D)
6. (B)
7. (D)
8. (A)
9. (C)
10. (B)