Acids, Bases and Salts Worksheet-3

Acids, Bases and Salts Worksheet-3

1. What must be administered to someone who has been stung by an ant?

(A) Sodium hydrogen carbonate

(B) Water

(C) Vinegar

(D) None of these

2. The following figure shows the colour changes in test tubes I, II and III when china rose indicator is added to them. The respective solutions in test tubes I, II and III are

(A) I: Sugar solution; II: Lime water; III: Lime juice

(B) I: Sugar solution; II: Lime juice; III: Lime water

(C) I: Lime water; II: Sugar solution; III: Lime juice

(D) I: Lime juice; II: Sugar solution; III: Lime water

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

       Column I                                 Column II

(Common name)                (Chemical formula)

(a)  Slaked Lime                  (i)     KOH

(b)  Caustic soda                 (ii)    Mg(OH)₂

(c)  Caustic potash              (iii)   Ca(OH)₂

(d)  Milk of magnesia        (iv)   NaOH

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

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

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

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

4. If OH^– ions are more than H⁺ ions in a solution, then the solution is

(A) Acidic          (B) Basic            (C) Neutral        (D) None of these

5. Study the flow chart carefully and identify X and Y.

(A) X: NaOH; Y: NaCl                (B) X: HCl; Y: NaOH

(C) X: NaOH; Y: HCl                  (D) X: HCl; Y: NaCl

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

Statement 1: Acids are sour in taste while bases are bitter in taste.

Statement 2: Baking soda does not taste sour.

(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.

7. Based on which of the following changes is an indicator useful?

(A) Colour

(B) Physical state

(C) Temperature

(D) Pressure

8. Why are acids always stored in glass containers and not in metallic ones?

(A) Glass containers are transparent

(B) Glass containers are cheaper

(C) Metal containers are not easily available

(D) Metal reacts with the acid stored in them

9. Identify the acid-base reaction from the following:

(A) NaCl + H₂O → NaOH + HCl

(B) CaCO­₃ + H₂O → Ca(OH)₂ + CO_­2

(C) NaOH → HCl → NaCl + H₂O

(D) CuSO₄ + Zn → ZnSO₄ + Cu

10. How will you classify the given sets of acids?

Set–I: (i) HCl, (ii) H₂SO₄, (ii) HNO₃

Set–II: (i) CH₃COOH, (ii) HCOOH, (iii) C₂H₅COOH

(A) Set–I consists of mineral acids while set–II consists of organic acids

(B) Set–I consists of organic acids while set–II consists of mineral acids

(C) Both sets consists of mineral acids.

(D) Both sets consist of organic acids

Answer Key:

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