Dew forms only when the dew point is:
ABelow freezing point
BAt zero exactly
CAbove boiling point
DAbove freezing point
Answer & Solution
Correct answer: D. Above freezing point
1. It needs clear sky, calm air and long cold nights.
2. The dew point must be above freezing.
3. Below freezing, frost forms instead.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 11, Water in the Atmosphere._
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