Acids, bases and salts Worksheet-4

Acids, bases and salts Worksheet-4

Multiple Choice Questions:

11. Acetic acid is a weak acid because

(A) It is fully ionized in water producing H⁺ ions.

(B) It is  partially ionized in water producing H⁺ ions.

(C) Concentrated acetic acid is strong.

(D) It does not ionize in water.

12. What are the products formed in the given reaction?

(A) NaZnO₂ + H_2(g)                            (B) ZnO + H₂O    

(C) NaH + ZnO                                  (D) None

13. What is the pH of coffee?

(A) 8-9                 (B) 6-7                  (C) 4-6                  (D) 2-5

14. Solution of ammonium chloride in water is-

(A) Acidic             (B) Basic               (C) Neutral          (D) Strong acidic

15. During electrolysis of sodium chloride ,chlorine gas is produced at-

(A) Anode

(B) Cathode

(C) Both anode and cathode in small amounts

(D) Both A and C

16. What are the chemical compounds required manufacture of washing soda?

(A) NH₃, NaCl                                   (B) NaCl, NH₃, CO₂, H₂O

(C) NaOH, HCl, CO₂, H₂O                 (D) NH₄Cl, NaOH, CO₂

17. Sodium hydrogen carbonate is used for making Baking soda because

(A) on heating it decomposes evolving Hydrogen gas

(B) on heating it decomposes forming sodium ions (Na⁺)

(C) On heating it decomposes evolving carbon di-oxide gas.

(D) A, B, C

18. Calcium oxychloride has bleaching property because

(A) On treating with dilute acids (di. H₂SO₄ / HCl) chlorine is produced

(B) On reaction with water oxygen is produced which has bleaching property.

(C) Chlorine present in calcium oxychloride has bleaching property.

(D) Both a and b

Answer key:

11. (B)

Acetic acid is a weak acid because if undergoes partial ionization in water thus producing a small amount of hydrogen ions.

12. (A)
13. (C)
14. (A)

  Solution is acidic due to the formation of 

15. (A)
16. (B)
17. (C)
18. (D)