In a beaker containing colloidal solution of sodium thiosulphate and a drop of con. sulphuric acid, light observed from side of beaker is:

Blue

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Red

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Green

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Yellow

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Solution

The correct option is A Blue
Colloidal solution of sodium thiosulphate consists of fine particles that mainly scatters blue light. Hence, it appears blue from the side of the beaker.

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Ram was having a gold coin. He dropped it in the beaker containing sulphuric acid. What will happen?

The above diagram shows the arrangement for observing scattering of light in colloidal solution, why does the beaker appear blue?

^{'} A^{'}

^{'} B^{'}

2000 \circ A

B

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