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      Question

      Materials for rain proof coats and tents owe their

      water proof properties to –
      A Surface tension Correct Answer Incorrect Answer
      B Viscosity Correct Answer Incorrect Answer
      C Specific gravity Correct Answer Incorrect Answer
      D Elasticity Correct Answer Incorrect Answer

      Solution

      Materials for rain proof coats and tents owe their water proof properties to Surface Tension. The surface of a liquid behaves like an elastic membrane and therefore, has a tendency to contract. This property of liquid is called Surface Tension.

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