hpas 2010 prelims
HPAS 2010 Prelims Question Paper Q1. Carbon dioxide absorbs strongly in infrared region and its presence in atmosphere decreases the loss of heat from earth by radiations. This is called: a) Carbon dioxide burning b) Carbon dioxide recycling c) Carbon recycling d) Greenhouse effect Click to view Answer ANSWER:- (d) Q2. Freons cause great environmental … Read more