‘Litmus’, a natural dye is an extract of which of the following?

The oxide of the element is basic as it turns red litmus blue .This means that the element is a metal (M).

Since soap is basic in nature, it will turn red litmus blue. However, the colour of blue litmus will remain blue.

A = {x: x is a natural number} = {1, 2, 3, 4, 5 …}  B ={x: x is an even natural number} = {2, 4, 6, 8 …}  C = {x:...

The solution which turns red litmus blue is basic. Its pH should be greater than 7. Therefore, the correct answer is (d).

Hyclrochloric acid because adding excess acid to the base would turn blue litmus solution  red.

(A) Red litmus remains red and blue litmus turns red.

(D) It smells like vinegar and turns blue litmus red.

(A) I and II

Soap is a salt of a strong base (NaOH or KOH) and a weak acid (carboxylic acid). So, its aqueous solution is basic in nature. Hence, an aqueous solution of...

(d) It smells like vinegar and turns blue litmus to red.