NCERT Exemplar Class 11
In problem 10.9, if 15.0 cm of water and spirit each are further poured into the respective arms of the tube, what is the difference in the levels of mercury in the two arms? (Specific gravity of mercury = 13.6)
12
Nov
In problem 10.9, if 15.0 cm of water and spirit each are further poured into the respective arms of the tube, what is the difference in the levels of mercury in the two arms? (Specific gravity of mercury = 13.6) if 15.0 cm of water and spirit each are further poured into the respective arms [...]
A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with 10.0 cm of water in one arm and 12.5 cm of spirit in the other. What is the specific gravity of spirit ?
12
Nov
A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with 10.0 cm of water in one arm and 12.5 cm of spirit in the other. What is the specific gravity of spirit ? 2 loops 3 loops and 4 loops Show that when a [...]
The mass of an electron is 9.1×10^−31 kg. If its K.E. is 3.0 × 10^−25 J, calculate its wavelength.
12
Nov
The mass of an electron is 9.1×10^−31 kg. If its K.E. is 3.0 × 10^−25 J, calculate its wavelength. calculate its wavelength. The mass of an electron is 9.1×10^−31 kg. If its K.E. is 3.0 × 10^−25 J November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000Kg. The area of cross section of the piston carrying the load is 425 cm^2. What maximum pressures would the smaller piston have to bear?
12
Nov
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000Kg. The area of cross section of the piston carrying the load is 425 cm^2. What maximum pressures would the smaller piston have to bear? 2 loops 3 loops and 4 loops Show that when a string fixed at its two [...]
The electron energy in hydrogen atom is given by En=(−2.18×10^−8)/n2J. Calculate the energy required to remove an electron completely from the n=2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition?
12
Nov
The electron energy in hydrogen atom is given by En=(−2.18×10^−8)/n2J. Calculate the energy required to remove an electron completely from the n=2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition? What is the number of photons of light with wavelength 4000 pm which provide 1 [...]
What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit ? And what is the wavelength of the light emitted when the electron returns to the ground state ? The ground state electron energy is −218×10^−11 erg.
12
Nov
What is the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit ? And what is the wavelength of the light emitted when the electron returns to the ground state ? The ground state electron energy is −218×10^−11 erg. What is the [...]
Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen.
12
Nov
Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen. Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?
12
Nov
What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state? What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state? November 12, 2020 Category: Chapter [...]
How much energy is required to ionise a H – atom if the electron occupies n=5 orbit ? Compare your answer with the ionization energy of H-atom (energy required to remove the electron from n=1 orbit ).
12
Nov
How much energy is required to ionise a H – atom if the electron occupies n=5 orbit ? Compare your answer with the ionization energy of H-atom (energy required to remove the electron from n=1 orbit ). How much energy is required to ionise a H - atom if the electron occupies n=5 orbit ? [...]
What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2? What is the colour corresponding to this wavelength ?
12
Nov
What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n = 4 to an energy level with n = 2? What is the colour corresponding to this wavelength ? What is the number of photons of light with wavelength 4000 pm which provide [...]