The following observations were made by students A,B,C and D when they rubbed solid baking soda on dry litmus paper Student Effect on dry redlitmus paper Effect on dry bluelitmus paper A Colour changed to blue No change B No change Colour changed C Colour changed to blue Colour changed to red D No change No change The correct observation was made by that student

CTET 2 Math and Science Jan 2012 Paper

Question : 75 of 120

Marks: +1, -0

The following observations were made by students A,B,C and D when they rubbed solid baking soda on dry litmus paper

Student	Effect on dry redlitmus paper	Effect on dry bluelitmus paper
A	Colour changed to blue	No change
B	No change	Colour changed
C	Colour changed to blue	Colour changed to red
D	No change	No change

The correct observation was made by that student

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