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Which of the following ions is coloured (a) Cu + (b) Cu 2+ (c) Ti 4+ (d) V 5+
29
Nov
Which of the following ions is coloured (a) Cu + (b) Cu 2+ (c) Ti 4+ (d) V 5+ Which of the following ions is coloured (a) Cu + (b) Cu 2+ (c) Ti 4+ (d) V 5+ November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work function of A, as compared to that of B is:
29
Nov
The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work function of A, as compared to that of B is: as compared to that of B is: The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work [...]
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s)
29
Nov
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s) If in a photoelectric cell the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping [...]
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ]
29
Nov
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] Light [...]
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Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons ,
then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] ,
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm)
29
Nov
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) What retarding [...]
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is
29
Nov
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is in different experiments the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold [...]
The reason for greater range of oxidation states in actinoids is attributed to (a) Actinoid contraction (b) 5f, 6d and 7s levels having comparable energies
29
Nov
The reason for greater range of oxidation states in actinoids is attributed to (a) Actinoid contraction (b) 5f, 6d and 7s levels having comparable energies 6d and 7s levels having comparable energies The reason for greater range of oxidation states in actinoids is attributed to (a) Actinoid contraction (b) 5f November 29, 2020 Category: Uncategorised [...]
Which of the following elements does not belong to the first transition series (a) Fe (b) V (c) Ag (d) Cu
29
Nov
Which of the following elements does not belong to the first transition series (a) Fe (b) V (c) Ag (d) Cu Which of the following elements does not belong to the first transition series (a) Fe (b) V (c) Ag (d) Cu November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP [...]
Which forms interstitial compounds (a) Fe (b) Co (c) Ni (d) All of these
29
Nov
Which forms interstitial compounds (a) Fe (b) Co (c) Ni (d) All of these Which forms interstitial compounds (a) Fe (b) Co (c) Ni (d) All of these November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
When an acidified solution of ferrous ammonium sulphate is treated with potassium permanganate solution, the ion which is oxidised is (a) MnO4 – (b) NH4 + (c) Fe ++ (d) SO4 2-
29
Nov
When an acidified solution of ferrous ammonium sulphate is treated with potassium permanganate solution, the ion which is oxidised is (a) MnO4 – (b) NH4 + (c) Fe ++ (d) SO4 2- the ion which is oxidised is (a) MnO4 - (b) NH4 + (c) Fe ++ (d) SO4 2- When an acidified solution of [...]