Which of the following observation is true about dilute solution of acetic acid?
It smells like vinegar and turns blue litmus red.
It smells like onion and turns blue litmus blue.
It smells like orange and turns red litmus blue.
It smells like vinegar and turns red litmus blue.
Ammonia is a brown coloured, pungent-smelling gas which turns moist blue litmus paper into the red colour.