A substance X turns the colour of red litmus blue, and it will change methyl orange-

Correct option is A

The correct answer is (a) Yellow.
· A substance that turns red litmus paper blue is a base.
· Methyl orange is an indicator that changes color based on the pH of the solution it is in.
· In acidic conditions, methyl orange turns red, while in basic conditions, it turns yellow.
· Since substance X is a base (it turns red litmus blue), it will turn methyl orange to yellow.
Information Booster:
· Colourless: Methyl orange does not turn colorless in either acidic or basic conditions.
· Red: Methyl orange turns red in acidic conditions, not in basic.
· Pink: Methyl orange does not turn pink; phenolphthalein, another indicator, turns pink in basic conditions.