Physics-
General
Easy
Question
An electron in hydrogen atom first jumps from second excited state to first excited state and then from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons emitted in these two cases be a, b and c respectively. Then
The correct answer is:
Related Questions to study
Physics-
The relation between half-life T of a radioactive sample and its mean life t is:
The relation between half-life T of a radioactive sample and its mean life t is:
Physics-General
Chemistry-
Statement 1:Polybutadiene is an example of step-growth polymer
Statement 2:Copolymerisation of butadiene and acrylonitrile gives Buna-N
Statement 1:Polybutadiene is an example of step-growth polymer
Statement 2:Copolymerisation of butadiene and acrylonitrile gives Buna-N
Chemistry-General
Chemistry-
Statement 1:Bakelite is a thermosetting plastic.
Statement 2:In thermosetting plastics, the polymeric chains are held together by strong covalent bonds.
Statement 1:Bakelite is a thermosetting plastic.
Statement 2:In thermosetting plastics, the polymeric chains are held together by strong covalent bonds.
Chemistry-General
Chemistry-
The interparticle forces between linear chains in Nylon-6, 6 are:
The interparticle forces between linear chains in Nylon-6, 6 are:
Chemistry-General
Chemistry-
Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
Free radical polymerisation requires a free radical initiator. The most commonly used free radical initiator is:
Chemistry-General
Maths-
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis and then passes through (5, 3) Then the equation of AB is
A ray of light passing through the point A (1, 2) is reflected at a point B on the x-axis and then passes through (5, 3) Then the equation of AB is
Maths-General
Chemistry-
Which of the following is the polymers can be used for lubrication and as an insulator?
Which of the following is the polymers can be used for lubrication and as an insulator?
Chemistry-General
Chemistry-
Number-average molecular mass of a polymer is determined by:
Number-average molecular mass of a polymer is determined by:
Chemistry-General
Chemistry-
Nylon-6 is prepared from:
Nylon-6 is prepared from:
Chemistry-General
Chemistry-
Carbonation of methyl magnesium bromide gives an organic compound This compound is also obtained by
Carbonation of methyl magnesium bromide gives an organic compound This compound is also obtained by
Chemistry-General
Chemistry-
In the following sequence of reactions, what is D ?
In the following sequence of reactions, what is D ?
Chemistry-General
Chemistry-
What is B?
What is B?
Chemistry-General
Chemistry-
The reaction, 
is known as
The reaction, is known as
Chemistry-General
Chemistry-
In the above reaction, product ‘P’ is
In the above reaction, product ‘P’ is
Chemistry-General
Chemistry-
Predict ‘X’ in the above reaction
Predict ‘X’ in the above reaction
Chemistry-General
