Question

Which of the following substances will give red colour on adding methyl orange indicator ?
a) Aq. Mgo
b) Aq.NaOH
C) NH OH
d) HNO3()

Answer 1

Answer:

(a) Methyl orange: Methyl orange changes its colour to yellow when added to a base or an alkali.

(b) Litmus paper: Red litmus paper turns blue, whereas blue litmus paper remains blue in a base or an alkali.

(c) Red cabbage extract: Red cabbage extract turns greenish-yellow in basic solutions.