Acids, bases and salts Worksheet-4

Acids, bases and salts Worksheet-4

 

Multiple Choice Questions:

  1. 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.

 

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

(A) NaZnO2 + H2(g)                            (B) ZnO + H2O    

(C) NaH + ZnO                                  (D) None

 

  1. What is the pH of coffee?

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

 

  1. Solution of ammonium chloride in water is-

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

 

  1. 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

 

  1. 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

 

  1. 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

 

  1. 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:

  1. (B)

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

  1. (A)
  2. (C)
  3. (A)

  Solution is acidic due to the formation of 

  1. (A)
  2. (B)
  3. (C)
  4. (D)