Physics NCERT Exemplar Solutions Class 12th Chapter Twelve

The total internal energy of two mole mono atomic ideal gas at temperature T = 300K will be __________J. (Given R = 8.31 J/mol.K)

Given below are two statements:

Statement – I : When $\mu$ moment of an ideal gas undergoes adiabatic change from state   $\left(P_1,V_1,T_1\right)$ to state $\left(P_2,V_2,T_2\right)$  then work done is w = $\frac{\mu R\left(T_2-T_1\right)}{1-\gamma },$  where $\gamma =\frac{C_p}{C_v}and$ R = universal gas constant.

Statement – II : In the above case, when work done on the gas, the temperature of the gas would rise.

Choose the correct answer from the options given below:

A diatomic gas $\left(\gamma =1.4\right)$  does 400 J of work when it is expanded isobarically. The heat given to the gas in the process is…………….J.

Given below are two statements:

Statement I : In hydrogen atom, the frequency of radiation emitted when an electron jumps from lower energy orbit (E₁) to higher energy orbit (E₂), is given as hf = E₁ = E₂

Statement II : The jumping of electron from higher energy orbit (E₂) to lower energy orbit (E₁) is associated with frequency of radiation given as f = (E₂ – E₁) / h

This condition is Bohr's frequency condition.

In the light of the above statements, choose the correct answer from the options given below:

In photoelectric effect experiment, the graph of stopping potential $\vee$ versus reciprocal of wavelength obtained is shown in the figure. As the intensity of incident radiation is increased:

For a perfect gas, two pressures P1 and P2 are shown in figure. The graph shows:

sjfkjffWNEFLWENFOILW

How does the Shiksha's NCERT Exemplar help in mastering Chapter 12 – Atoms?

According to Bohr's theory, why do electrons not fall into the nucleus?

In understanding atomic structure, what is the significance of Bohr's model?