Figure shows a cross - section of light pipe made of glass fibre of refractive index 1.68. The outer coatingof the pipe is made of a material of refractive index 1.44. What is the range of angles of the incident rays with the axis of the pipe for which total internal reflection inside the pipe takes place?

Given a square with side length of 12√2 cm, find the diagonal.

For such questions, we should know the properties of different triangles.

If the chromosome number of cells of nucellus of megasporangium of Pinus 16 (sixteen) what would be the chromosome number of endosperm cells:

Which statement is incorrect about the following reaction

Which is the correct reaction coordinate diagram for the following solvolysis reaction ?

Which of the following order of decreasing rate of SN reaction in CF3CO2H is correct
I)
II)
III)
IV) 

The correct order of / E2 ratio for the % yield of product of the following halide is
P)
Q)
R)
S) 

Select the formula representing the major product of the following reaction

If Then what will be the major product of the following reaction

The most probable product in the following reaction is :

Arrange the following in decreasing order of stability of their transition state during elimination by strong base
I)
II)
III) 

In the following reaction the most probable product will be :

What will be the major product of the following reaction

What will be the major product of the following reaction ?

The increasing order of reactivity of the following isomeric halides with AgNO₃(H₂O + alcohol) is :
I)
II)
III)
IV) 

The correct reactivity order of alcohols towards H–X will be
I)
II)
III)
IV)