Acids, Bases and Salts Objective Questions
1-Acids
(A) are sour in taste
(B) change the color of the blue litmus to red.
(C) both (A) and (B)
(D) are bitter in taste
2- Bases
(A) are sour in taste
(B) change the color of the blue litmus to red.
(C) both (A) and (B)
(D) are bitter in taste
3-Following indicator(s) is(are) used to test acids and bases
(A) Litmus
(B) Methyl orange
(C) Phenolphthalein
(D) All of the above
4-When the litmus solution is neither acidic nor basic, its color is
(A) grey
(B) purple
(C) red
(D) pink
5-2NaOH + Zn →
(A) Salt
(B) Hydrogen gas
(C) Salt + Hydrogen gas
(D) Salt + Oxygen gas
6-Following is (are) form(s) of calcium carbonate.
(A) Limestone
(B) Chalk
(C) Marble
(D) All of the above
7-Metal carbonate/Metal hydrogencarbonate + Acid →
(A) Salt + Carbon dioxide
(B) Carbon dioxide + Water
(C) Salt + Water
(D) Salt + Carbon dioxide + Water
8-The reaction between an acid and a base to give a salt and water is known as a
(A) neutralization reaction
(B) exothermic reaction
(C) endothermic reaction
(D) none of the above
9-Which of the following is a neutralization reaction
(A) Base + Acid → Carbon dioxide + Salt
(B) Base + Acid → Salt + Hydrogen
(C) Base + Acid → Carbon dioxide + Water
(D) Base + Acid → Salt + Water
10-Which of the following is true for metal oxides
(A) Metal oxide + Acid → Carbon dioxide + Salt
(B) Metal oxide + Acid → Salt + Hydrogen
(C) Metal oxide + Acid → Carbon dioxide + Water
(D) Metal oxide + Acid → Salt + Water
ANSWERS:
1-(C), 2-(D), 3-(D), 4-(B), 5-(C), 6-(D), 7-(D), 8-(A), 9-(D), 10-(D)