In CCI4 I2 shows________________?
Correct answer: B. Purple colour
- A. Red colour
- B. Purple colour
- C. Blue colour
- D. Yellow colour
Explanation
Iodine dissolves in non-polar carbon tetrachloride, CCl4, to form a violet or purple solution because the molecular iodine absorbs visible light selectively. Students may choose yellow because iodine can appear brown or yellow-brown in some dilute or different media, but its characteristic colour in CCl4 is purple.
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About Properties of Liquids
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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