UPSC General Science MCQs – 06 1

What is a zoom lens? [UPSC 2008]

What is the difference between a CFL and an LED lamp? [UPSC 2011 (CS-P)]
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than that of an LED lamp
3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?

Which features of some species of blue – green algae helps promote them as bio-fertilizers? [UPSC 2010 (CS-P)]

Which one of following reflects back more sunlight as compared to other three? [UPSC 2010 (CS-P)]

Which one of the following is associated with Darwinism? [UPSC 2008]

Which one of the following is known as Marsh gas? [UPSC 2008]

Which one of the following is not a site for in-situ method of conservation of flora? [UPSC 2011 (CS-P)]

Which one of the following is the largest terrestrial wild animal? [UPSC 2008]

Which one of the following processes in the bodies of living organisms is a digestive process? [UPSC 2010 (CS-P)]

Recently, “oilzapper” was in the news. What is it? [UPSC 2011 (CS-P)]