Consider the following statements about solar water heater.

1. It works on the principle of Greenhouse effect
2. Pipes are painted with white colors
3. Copper pipes are used in the solar water heater

Select the correct statement using the codes given below.
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1,2 and 3

Ans – [C]

Explanation – Statement 2 is wrong. Pipes are painted black and not white to enable maximum absorption of sunlight. You can read about working of solar heater here andhere.