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 ?

Question 2 of 10

Chloroform gives a trichloro derivative of an alcohol on reaction with

Question 3 of 10

Identify the incorrect statement from the following:

Question 4 of 10

The two slits are 1 mm apart from each other and illuminated with a light of wavelength 5 x 10^-7 m. If the distance of the screen is 1 m from the slits, then the distance between third dark fringe and fifth bright fringe is

Question 5 of 10

Which one of the following pairs of substances will not produce hydrogen when reacted together?

Question 6 of 10

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

Question 7 of 10

If x₁, x₂, x₃ as well as y₁, y₂, y₃ are in GP with the same common ratio, then the points (x₁, y₁), (x₂, y₂) and (x₃, y₃) :

Question 8 of 10

A

B

C

D

E

Question 9 of 10

The molecule having smallest bond angle is :

Question 10 of 10

The values of λ so that the line 3x-4y=λ touches x²+y²-4x-8y-5=0 are