ScienceClass 7CBSE
Q
Which of the following set of substances contain acids? (a) Grapes, lime water (b) Vinegar, soap (c) Curd, milk of magnesia (d) Curd, vinegar
A
Soln:
The answer is (d) Curd, vinegar
Explanation:
Curd contains lactic acid, and vinegar contains acetic acid.