JEE Revision Plan - Chemistry 6.1 for JEE & BITSAT Exams

Question 1

Of the following transitions in hydrogen atom, the one which gives an absorption line of lowest frequency is

Question 2

In the hydrogen atom the transition that gives radiation in the visible region is

Question 3

The frequency of first line of Balmer series in hydrogen atom is f. The frequency of corresponding line emitted by single ionised helium atom is

Question 4

The maximum wavelength of light that can excite an electron from first to third orbit of hydrogen atom is

Question 5

Which of the following is the energy of a possible excited state of hydrogen?

Question 6

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:

Question 7

The number of waves made by a Bohr electron in an orbit of maximum magnetic quantum number +2

Question 8

The wavefunction of the atomic orbital of a H- like species is given as
Ψ=[1/4(2π)]Z^1/2(2-Zr)e^-Zr/2
The radius for nodal surface for He⁺ ion is

Question 9

Match list-Iwith list-II and select the correct answer using the codes given below –

Question 10

Heat required to raise the temperature of a given substance by 1 ° or 1K is known as-

Question 11

Which of the following quantities is zero in the case of expansion of gas against vacuum?

Question 12

What is the magnitude of the enthalpy of neutralization of a strong acid and a strong base?

Question 13

If the enthalpy of ionization of HCN is 45.2 kJ mol^-1 and the enthalpy of ionization of acetic acid is 2.1 kJ mol^-1 which of the following relation holds true?

Question 14

Three lawn chairs, one made up of aluminium (heat capacity=.90 J/K-g), one of iron (heat capacity=.45 J/K-g) and one of tin (heat capacity=.60J/K-g) are painted of the same colour. On a sunny day which chair will be the hottest to sit?

Question 15

A real gas is subject to an isothermal change of state from (2bar, 40L, 300K) to (4bar, 30L, 300K) against the constant external pressure of 4 bar. The enthalpy change for the process is: