Question Answers

Find the minimum number of cells required to produce a current of 1.5 A through a resistance of 30 ohm . Given that the emf of each cell is 1.5 V and the internal resistance is 1 ohm. Find the minimum number of cells required to produce a current of 1.5 A through a resistance [...]

The equilibrium constant for a reaction is k1 and the reaction quotient is Q. For a particular reaction mixture, the ratio K/Q is 0.33. This means that: The equilibrium constant for a reaction is k1 and the reaction quotient is Q. For a particular reaction mixture the ratio K/Q is 0.33. This means that: November [...]

The equilibrium constant Kc for the reaction P4(g)⇌2P2 ​(g) is 1.4 at 400^∘C. Suppose that 3 moles of P 4 ​ (g) and 2 moles of P2 (g) are mixed in 2 litre container at 400^∘C. What is the value of reaction quotient (Q c )? Find out the difference in number of angular nodes [...]

Calculate the value of A. A = E1,2/2E2,1 where En,z = energy of electron in nth orbit, z = atomic number of hydrogen like species. 1 where En 2/2E2 Calculate the value of A. A = E1 z = atomic number of hydrogen like species. z = energy of electron in nth orbit November 10, [...]

In a sample of excited hydrogen atoms electrons make transition from n=2 to n=1 emitted quanta strike on a metal of work function (phi) 4.2eV. Calculate the wavelength (in A0) associated with ejected electrons having maximum kinetic energy. Find out the difference in number of angular nodes and number of radial nodes in the orbital [...]

An α particle moving with velocity 1/30 th times of velocity of light. If uncertainty in position is 3.31/π pm, then minimum uncertainty in kinetic energy is y×10^−16 J. Calculate the value of y. An α particle moving with velocity 1/30 th times of velocity of light. If uncertainty in position is 3.31/π pm then [...]

Find the separation between two electron (in Å) in vacuum, if electrostatic potential energy between these electrons in 7.67×10^−19)J. [Given: e= 1.6×10^−19C ∈o=8.85×10^−12 J^(-1)C^(2)m^(-1)π=3.14] Find the separation between two electron (in Å) in vacuum if electrostatic potential energy between these electrons in 7.67×10^−19)J. [Given: e= 1.6×10^−19C ∈o=8.85×10^−12 J^(-1)C^(2)m^(-1)π=3.14] November 10, 2020 Category: Chapter 2 - [...]

For 3s orbital of hydrogen atom, the normalised wave function is Ψ3s=1(81) root3π−√(1/ao)^3/2[27 − 18r/ao + 2r^2/a^2o]e^−r/3ao If distance between the radial nodes is d, calculate the value of d/1.73ao calculate the value of d/1.73ao For 3s orbital of hydrogen atom the normalised wave function is Ψ3s=1(81) root3π−√(1/ao)^3/2[27 − 18r/ao + 2r^2/a^2o]e^−r/3ao If distance between [...]

When an electron makes transition from (n+1)state to n state the wavelength of emitted radiations is related to n (n>>>1) according to λ∝nx. What is the value of x ? When an electron makes transition from (n+1)state to n state the wavelength of emitted radiations is related to n (n>>>1) according to λ∝nx. What is [...]

Infrared lamps are used in restaurants to keep the food warm. The infrared radiation is strongly absorbed by water, raising its temperature and that of the food. If the wavelength of infrared radiation is assumed to be 1500nm, then the number of photons per second of infrared radiation produced by an infrared lamp, that consumes [...]