Question

From the following___________ is acidic in nature
1)soap 2)salt 3) lemon extract 4) sugar

Answer 1

Hi thank you for asking the question 
Substances are classified as acidic basic or neutral on the base if there pH .pH is the negative log of hydrogen ion of a substance i.e pH= -log (H+)
The pH range from the value of 1 - 14 . The substances with the pH 7 are known as neutral. Those having value below 7 are acidic and those having above are basic.Among the gives substances only extract of lemon have a pH of 2 and it is known as acetic acid 
So lemon extract is acidic in nature
Hope this answer helped you