Four students observed the colour and odour of acetic acid and its reaction with sodium hydrogen carbonate. They tabulated their observations as given below:

The correct set of observations is that of student:

Four students (A), (B), (C) and (D) independently observed the evaporation of water under different conditions, and recorded the temperature of water at regular interval as shown below The correct recording of observations is that of the student :

2mL of ethanoic acid was taken in each of test tube I and test tube II. A red litmus paper was introduced in test tube I and a pH paper was introduced in test tube II. The experiment was performed by four students A,B,C and D and they reported their observations as given below: The correct set of observations was made by the student:

Four students added a small amount of ethanoic acid to sodium hydrogencarbonate. The gas evolved was tested for its behaviour with burning splinter and lime water. They reported their observations as given on the next page. The correct observations have been reported by student:

State what is observed when, neutral litmus soln. is added to sodium hydrogen carbonate solution

What do you observe by adding dilute HCl to sodium carbonate and sodium hydrogen carbonate ?

In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students tabulated their observations as given below. Which student is correct.