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Bubbles of colourless soap solution appe...

Bubbles of colourless soap solution appear coloured in sun light. Why ?

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Interference
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Two soap bubbles of the same soap solution have diameters in the ratio 1 :2. What is the ratio of work done to blow these bubbles ?

On electroysing CuSO_(4) solution in presence of Pt , the solution becomes colourless, blue colour of solution disappears. Why?

Knowledge Check

  • A violet colour is obtained on adding Cl_(2) water in solution of potassium halide in presence of chloroform and on adding excess of Cl_(2) water, violet colour disappears and colourless solution appears. The test shows the presence of

    A
    Iodide ion
    B
    Bromide ion
    C
    Chloride ion
    D
    Iodide and bromide ion

  • Soap bubble appears coloured due to the phenomenon of

    A
    interference
    B
    diffraction
    C
    dispersion
    D
    reflection

  • An air bubble just inside a soap solution and a soap bubble blown using the same solution have the same radii. The ratio of the excess pressure inside the air bubble to that inside the soap bubble is

    A
    `1:4`
    B
    `1:2`
    C
    `2:1`
    D
    `4:1`

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    Soap Bubble Colour

    Why does the sun appear red at sunset ?

    Two soap bubbles of the same soap solution have radii 3 cm and 1.5 cm. If the excess pressure inside the bigger bubble is 40 "dyn/cm"^(2) what is the excess pressure inside the smaller bubble ?

    If work W is done in blowing a bubble of radius R from a soap solution. Then the work done is blowing a bubble of radius 2R from the same solution is

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