Acids, Bases and Salts Sample Questions for Class 7
Question 1
Which of the following statement is incorrect about acid?
A. Acid is sour in taste
B. Acid turns blue litmus paper red
C. Water should be added to acid with constant stir
D. Dilution of acid is highly exothermic
Question 2
Where do you find malic acid?
A. Grapes
B. Raw mangoes
C. Pineapples
D. Apples
Question 3
Which of the following is not an alkali?
A. Sodium hydroxide
B. Silver hydoxide
C. Ammonium hydroxide
D. Magnesium hydroxide
Question 4
China rose water indicator will turn _____ in acid and _____ in base.
A. Dark pink and green
B. Red and yellow
C. Orange and blue
D. Orange and colourless
Question 5
To make common salt which acid and base should be combined?
A. Hydrochloric acid and sodium hydroxide
B. Carbonic acid and potassium hydroxide
C. Nitric acid and magnesium hydroxide
D. Acetic acid and ammonium hydroxide