Question Answers

When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photo current is −V0/2. When the surface is illuminated by monochromatic light of frequency v/2, the stopping potential is −V0. The threshold frequency for photoelectric emission is : the stopping potential for the photo current is −V0/2. [...]

In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons emitted by mercury atoms is close to an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 eV. The minimum wavelength of photons [...]

The sum of the number of lone pairs of electrons on each central atom in the following species is (TeBr6) 2- , (BrF2) +, SNF3 and (XeF3) – (BrF2) + SNF3 and (XeF3) - The sum of the number of lone pairs of electrons on each central atom in the following species is (TeBr6) 2- [...]

Three moles of B2H6 are completely reacted with methanol. The number of moles of boron containing product formed is Three moles of B2H6 are completely reacted with methanol. The number of moles of boron containing product formed is November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Among PbS, CuS, HgS, MnS, Ag2S, NiS, CoS, Bi2S3 and SnS2, the total number of BLACK coloured sulphides is Ag2S Among PbS Bi2S3 and SnS2 CoS CuS HgS MnS NiS the total number of BLACK coloured sulphides is November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Among the following, the number of compounds that can react with PCl5 to give POCl3 is O2, CO2, SO2, H2O, H2SO4, P4O10 Among the following CO2 H2O H2SO4 P4O10 SO2 the number of compounds that can react with PCl5 to give POCl3 is O2 November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

The value of n in the molecular formula BenAl2Si6O18 is The value of n in the molecular formula BenAl2Si6O18 is November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

A tin chloride Q undergoes the following reactions (not balanced) Q + Cl – to X Q + Me2N to Y Q + CuCl2 to Z + CuCl X is a monoanion having pyramidal geometry. Both Y and Z are neutral compounds. Choose the correct option(s) Which of the following is/are V-shaped molecule (s) (a) [...]

Based on the compounds of group 15 elements, the correct statement(s) is (are) (a) Bi2O5 is more basic than N2O5 Based on the compounds of group 15 elements the correct statement(s) is (are) (a) Bi2O5 is more basic than N2O5 November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The compound(s) which generate(s) N2 gas upon thermal decomposition below 300 C is (are) (a) NH4NO3 (b) (NH4)2Cr2O7 The compound(s) which generate(s) N2 gas upon thermal decomposition below 300 C is (are) (a) NH4NO3 (b) (NH4)2Cr2O7 November 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,