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 :

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:

Aqeuous solutions of zinc sulphae and iron sulphate were taken in test tubes I and II by four students A,B, C and D. Metal pieces of iron and zinc were dropped in the two solutions and observations made after several hours and recorded in the form of a table as given below: The correct reporting has been made in observation reported by the student:

Four students, A, B, C and D, make the records given below, for the parts marked X and Y in this diagram. The correct record, out these, is that of student:

Aluminium sulphate and copper sulphate solutions were taken in two test tubes I and II respectively. Iron filings were then addd to both the solutions. The four students A,B, C and D recorded their observations in the form of a table as given on the next page. The correct set of observations have been recorded by the student:

Graphs plotted by four students A, B, C and D for the experiment "To study the dependence of current (I) on the potential difference (V) across a resistor" are shown below : The correct V-I graph is :

A student performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He then recorded his observations as given in the table. The correct observation is :

Four students took separately the mixture of sand, common salt and ammonium cloride in beakers, added water, stirred the mixture well and then filtered. They reported their observations as shown below Who reported the observations in the correct order of the components as residue and in the filtrate ?