MCQ Acids, Bases and Salts

CBSE/NCERT 7th Class MCQ CBSE/NCERT 7th Class MCQ on Science

11- The fats in our body contains …………..

(A) Bases

(B) Acids

(C) Salts

(D) Fatty acids


12- The word acid comes from Latin ‘acere’ which means

(A) Sweet

(B) Bitter

(C) Salt

(D) Source


13- …………….are used to test substances whether a substance is acidic or basic.

(A) Indicators

(B) Neutral

(C) Bases

(D) Acidic


14- Which of the following is/are an example of naturally occurring indicators?

(A) Turmeric

(B) Litmus

(C) Gudhal (China rose Petals)

(D) All of the above


15- Match the following

Name of acid               found in

a. Acetic acid               1. Vinegar

b. Formic acid              2. Ant’s sting

c. Citric acid                  3. Oranges

d. Lactic acid                 4. Curd

(A) a-4, b-3, c-2, d-1

(B) a-2, b-1, c-3, d-4

(C) a-1, b-2, c-3, d-4

(D) None of the above


16- Which type of acid is found in spinach?

(A) Ascorbic acid

(B) Lactic

(C) Oxalic acid

(D) Tartaric acid


17- Amla, Citrus fruits are rich in

(A) Ascorbic acid

(B) Oxalic

(C) Tartaric

(D) None of the above


18- Which type of acid is found in tamarind, grapes and unripe mangoes?

(A) Citric acid

(B) Tartaric acid

(C) Acetic acid

(D) None of the above


19- Match the following

     Name of base                          found in

a. Calcium hydroxide             1. Lime water

b. Ammonium hydroxide     2. Window cleaner

c. Potassium hydroxide/       3. Soap

     Sodium hydroxide

d. Magnesium hydroxide      4. Milk magnesia

(A) a-4, c-3, b-2, a-1

(B) a-2, b-1, c-3, d-4

(C) a-1, b-2, c-3, d-4

(D) None of the above


20- Most commonly found natural dye in nature is litmus. It is extracted from …………….plant.

(A) Amarbel

(B) Amla

(C)  Mahua

(D) Lichens



11-(D), 12-(D), 13-(A), 14-(D), 15-(C), 16-(C), 17-(A), 18-(B), 19-(C), 20-(D)