Question

What will be the action of the following substances on methyl orange and phenolphthalein? Dry HCl gas, Moistened NH3 gas, Lemon juice
, Curd, Soap solution?

Answer 1

1. Question⇒   What will be the action of the following substances on methyl orange and phenolphthalein? Dry HCl gas, Moistened NH3 gas, Lemon juice , Curd, Soap solution?

Explanation:

• ☆Dry HCI gas does not change the colour of the litmus paper as to change the colour we need presence of ions like hydrogen and hydronium..
• ☆Moistened NH3 gas turns the red litmus paper into blue due to the ammonium chloride formed..
• ☆Lemon juice changes blue litmus to red as it contains citric acid in it..
• ☆Carbonated soft drinks have CO2 in them which forms carbonate acid and turns blue litmus to red..
• ☆Curd is a product of milk so it contains lactic acid in it and therefore it changes blue litmus to red..
• ☆Soap solution is a base and therefore changes red litmus paper to blue..
• Hope it helps u my frnd......