1. In which of the following activities are Indian Remote Sensing (IRS) satellites used? 
1. Assessment of crop productivity
2. Locating groundwater resources
3. Mineral exploration
4. Telecommunications
5. Traffic studies
 

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2. With reference to 'fly ash' produced by the power plants using coal as fuel, which of the following statements is/are correct? 
1. Fly ash can be used in the production of bricks for building construction.

2. Fly ash can be used as a replacement for some of the Portland cement concrete.
3. Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic elements.
 

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3. H1N1 virus is sometimes mentioned in the news with reference to which one of the following diseases?

4. The term 'IndARC', sometimes seen in the news, is the name of 

5. With reference to the use of nano-technology in health sector, which of the following statements is/are correct?
1. Targeted drug delivery is made possible by nanotechnology.
2. Nanotechnology can largely contribute to gene therapy.
 

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