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Answer Key CSIR NET Mathematical Sciences (Maths) June 2012

Updated: July 14th 2012
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Solution: Question 1 Chemical Sciences June 2012

The Question:

In still air, fragrance of a burning incense stick will be smelt by an observer quickest when the experiment is carried out at

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Answer:

Let’s first consider the altitude, at high altitude there would be lower density of air and vice versa. At higher temperature the fragrance will move quicker.

The answer would be option 1 i.e. low altitude and high air temperature

Solution: Question 1 Life Sciences June 2012

The Question:

The area of shaded region in cm2 is?

image

Solution:

From the figure, the shaded area is ¼­ ­­ of the difference between the area of circle pr2 and largest square enclosed in it which is 2r2.

First, area of circle in cm2 = pr2 = 4p ; Area of the square which is composed of 4 equal triangles would be 4 times of area of each right angle triangle 2*2/2 i.e. 8;

Now area of shaded region = 4p-8/4 = p-2, Answer is option 2