1.

Four students observed the colour and odour of acetic acid and its reaction with sodium hydrogencarbonate. They tabulated their observations as given below. Student Colour of acetic acid Odour of acetic acid Action with sodium hydrogencarbonate A B C D blue colourless light green light brown fruity smell of vinegar odourless rotten eggs gas evolves without bubbles effervescence gas evolves without bubbles effervescence The correct set of observation is that of student:(1) A(2) B(3) C(4) D

Answer» Four students observed the colour and odour of acetic acid and its reaction with sodium hydrogencarbonate. They tabulated their observations as given below.















Student Colour of acetic acid Odour of acetic acid Action with sodium hydrogencarbonate
A

B

C

D
blue

colourless

light green

light brown
fruity

smell of vinegar

odourless

rotten eggs
gas evolves without bubbles

effervescence

gas evolves without bubbles

effervescence

The correct set of observation is that of student:

(1) A

(2) B

(3) C

(4) D


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