CSIR NET Life Science December 2010 paper

CSIR NET Life Science December 2010 paper (Based on Memory

 

1. Pumice is the name of the most common volcanic rock that floats. It has various air bubbles and capillaries which trap air. Which statement is correct for this rock

1. Air cavities are interconnected

2. Air cavities are not connected

3. Density of rock is more than water

4. Rock is very older

 

2. Which of the following is responsible for ozone hole?

1. CO2                                 2. CH4

3. Chlorine                       4. NO

 

3. The mean salinity of sea 35 g per liter. The main cause of this observed salinity is

1. Evaporation and rainfall

2. Photosynthesis

3. Crust erosion and surface run off

4. Rivers drainage

 

4. Smog is due to

1. Air pollution derived from smoke and vehicles

2. More moisture in environment

3. Increase in CO2

4. Low temperature of earth surface

 

5. Which of the following is not a direct consequence of green house effect?

1. Increase in sea level                                 2. Rainfall

3. Tsunami                                                        4. Global warming

 

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December 2010 Paper

Thanks for IFAS, Jodhpur