Question 1 of 10

On a humid day in summer, the mole fraction of gaseous H2O (water vapour ) in the air at 25° C can be as high as 0.0287. Assuming the total pressure of 0.977 atm, what is the partial pressure of dry air ?

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E

Question 2 of 10

Under which one of the following conditions, does the reaction take place,

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D

Question 3 of 10

Which of the following has maximum number of lone pairs associated with Xe?

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D

Question 4 of 10

Sulphur trioxide can be obtained by which of the following reaction.

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D

Question 5 of 10

The force between two magnetic poles is F. If the distance between the poles and the pole strenghts is doubled, then the force experienced is:

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E

Question 6 of 10


then the matrix A is equal to

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E

Question 7 of 10

According to MO theory, which of the following ranks the nitrogen species in terms of increasing bond order?

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B
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D

Question 8 of 10

Identify the incorrect statement from the following:

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D

Question 9 of 10

If vector a = i + 2j + 3k and b = i × (a×i) + j×(a×j) + k×(a×k) then length of b is equal to

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D

Question 10 of 10

The coherent sources whose intensity ratio is 81:1 produce interference fringes. The ratio of minimum to maximum intensity i.e. Imin:Imax is

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E
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