In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are:
In a hydrogen like atom electron makes transition from an energy level with quantum number n to another with quantum number (n - 1). If n>>1, the frequency of radiation emitted is proportional to
A solid body of constant heat capacity J/∘C is being heated by keeping it in contact with reservoirs in two ways :
(i) Sequentially keeping in contact with 2 reservoirs such that each reservoir supplies same amount of heat.
(ii) Sequentially keeping in contact 8 reservoirs such that each reservoir supplies same amount of heat.
In both the cases body is brought from initial temperature 100∘C to final temperature 200∘C. Entropy change of the body in the two cases respectively is :
Three positive numbers from an increasing G.P. If the middle term in this G.P. is doubled, the new numbers are in A.P. Then the common ratio of the G.P. is
The x-coordinate of the incentre of the triangle that has the coordinates of mid points of its sides as (0, 1), (1, 1) and (1, 0) is
Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion the average time of collision between molecules increases as Vq, where V is the volume of the gas. The value of q is :