Question

give reason sodium hydrogen sulphate solution changes blue litmus paper red although it is not a acid​

Answer 1

Answer:

Do you know dear mate the indicators never check the acidity or alkaline substance because indicators check the concentration of hydrogen ion present in the solution if the concentration of hydrogen in the solution is more than obviously the blue litmus will trun into red colour and the name of the compound itself indicates that the hydrogen ions present in the solution are more and that's the reason for your question hope your doubt is cleared