Physics question and answers for July 02, 2023
- Q 8h Ym dx The total energy of the particle is sum of kinetic energy and potential energy i e Thus or E K E P E E d y h...
- Q 32 Hydrogen peroxide solution 20 mL reacts quar with a solution of KMnO4 20 mL acidified w H SO4 The same volume of the KMnO4 soluti decolourised by 10 mL...
- Q 200 units of energy is required to take away electron from the lowest energy level to infinity The energy released when electron falls from infinite level to the second shell...
- Q Which of the following has been arranged in order of decreasing freezing point Question Type Single Correct Type 0 05 M KNO3 0 04 M CaCl 1 0 140 M...
- Q A sample of H atoms containing all the atoms is some excited state is irradiated with the light of wavelength and atoms get re excited to further higher excited state...
- Q on is moving in 3rd orbit of Li 2 and its separation energy is y The separation energy of an electron moving in 2nd orbit of Het is 13 62...
- Q True or false If false explain clearly in complete sentences and with all arguments why is it false 1 The fifth excited energy level of a particle in a perfect...
- Q 210 The threshold frequency vo for a metal is 5 x 1014 s Calculate the kinetic energy of an electron emitted when the metal is irradiated with a radiation of...
- Q 1 The energy of an electron in the second and third Bohr s orbits of a hydrogen atom are 5 41 x 10 erg and 2 41 x10 2 erg...
- Q NA 2 A sample of H atoms having electrons in the ground state is exposed to high energy rays of quantum energy 13 3875 eV The H atoms absorb the...
- Q 2 A sample of H atoms having electrons in the ground state is exposed to high energy rays of quantum energy 13 3875 eV The H atoms absorb the energy...
- Q 46 An alpha particle and a proton are accelerated separately by the potential difference of 2 V and ZV respectively but ratio of de Broglie wavelength of alpha particle to...
- Q It is found that 3 125 x 108 g atoms of Rn exist in equilibrium with 1 g of radium at 0 C and 1 atm pressure The disintegration constant...
- Q 35 17Cl and 37 17Cl are symbols of tw o isotopes of chlorine i Compare the atoms of these isotopes with respect to the composition of nuclei 2
- Q or here 1 V RH 2 n V wave number 109677 76 cm 1 daglug V RH X C 1 1 2 n2 1 2 2 n n 2 where...
- Q A mixture of Li CO and Na CO is heated strongly in an open vessel If the loss in mass of mixture is Na 23 A 1 1 220 The...
- Q Incorrect statement among the following is are a 1 g atom of oxygen is No times heavier than 1 atom of oxygen b 1 m of H g at STP...
- Q of all gases contain equal number of atoms at same temperature and pressure This statement is 1 In accordance with Dalton s atomic theory and is known as Berzelius Hypothesis...
- Q nsition series spectrum Wavenumber 109677 1 n1 2 1 n2 2 Is n1 always smaller than n2 Cant this val ue be negative When the energy is absorb ed can...
- Q Five ionization energy values in kJ mol are listed below E 870 E 830 E3 1010 E4 1290 E5 376 These are a successive ionization energies for the element with...
- Q 1 a Write down the Planck distribution law for black body radiation in one convenient form and hence show that the wavelength corresponding to the maximum energy density is inversely...
- Q WBSU Year 2012 1 c Calculate the de Broglie wavelength for an electron me 9 1x10 31 kg having kinetic energy as 13 6 eV Given electronic charge 1 6...
- Q 2 3 Comprehension Type I Read the paragraph carefully and answer the following questions Due to very high speed of electrons in atoms molecules etc they show some relativistic effect...
- Q e What is photoelectric effect Draw a plot of kinetic energy for the ejected photoelectron vs frequency of the incident radiation in a photoelectric experiment with three different metals What...
- Q 25 Maximum number of electrons in a subshell of an atom is determined by the following a 2 1 b 4 2 c 2n d 4 2 2009 Which of...
- Q 10 The uncertainty in momentum of an electron is 1 x 10 5 kg m s The uncertainty in its position will be h 6 62 10 34 kg m...
- Q A sample containting large number of Li2 ions all in a particular excited state is subjected a photons coming from M shell to K shell transition of any unielectronic species...
- Q 44 The position of both an electron and a helium atom is known within 1 0 nm Further the momentum of the electron is known within 5 0 10 26...
- Q c Hund d ommerfield 1999 42 The de Broglie wavelength of a particle with mass 1 g and velocity 100 m s is a 6 63 10 35 m c...
- Q The value of n 1 2 3 4 and 5 for the Lyman Balmer Paschen Brackett and Pfund series respectively n2 is greater than n by at least 1 Values...
- Q 9 How many degenerate orbitals are present in a subshell if electron associated with that subshell possesses orbital angular momentum 2 3 1 No degenerate orbitals 2 Seven degenerate orbitals...
- Q What volume of a liquid in L will contain 10 mole If molar mass of liquid density is 1 4g mL 16 g of SO gas occupies 5 6L at...
- Q show hamiltonian operator for the plane waves exponential imaginary Prove that this operator does not change this function Prove that this operator does generate energy of a particle in free...
- Q 3 31 pm then minimum uncertainty in kinetic energy is yx10 16 J Calculate the value of y TI 13 In a sample of excited hydrogen atoms electrons make transition...
- Q Imagine a alternate existing universe in which the set of 4 quantum numbers exist in given values n 1 to infinity 0 to n 1 m l 1 to l...
- Q 7 Which transition emits photon of maximum frequenc 1 2nd spectral line of Balmer series 2 2nd spectral line of Paschen series 3 5th spectral line of Humphery series 4...
- Q Describe the motion of a charged particle in uniform magnetic field In a chamber a uniform magnetic field of 6 5G is maintained An electron is shot into the field...
- Q The mass of a dust particle is 10 2 g and its velocity is 104 cm sec The error in the measurement of velocity is 0 01 The uncertainty in...
- Q 13 An oxide of nitrogen has a molecular weight 92 Find the total number of electrons in one gram mole of that oxide 1 4 6N 2 46N 3 23N...
- Q Kn 28 Balmer gave an equation for wavelength of visible region of H spectrum as 2 4 Where n principal quantum number of energy level K constant in terms of...
- Q o felectron 9 10 kg ty of light 3 x 10 ms 1 s constant 6 626 x 10 34 Js of electron 1 6 10 19 jeV 1 0...
- Q m 1 d 2 a 4 1 1 How ma d 4p 6 tron which is rem 0 ms 1 173 Wave function of an orbital is plotted against the...
- Q 174 The Schrodinger wave equation for hydrogen atom is 3 2 1 1 4 25 ao 4 2 o where ao is Bohr s radius If the radial node in...
- Q Element A has 5 isotopes Out of every 220 A atoms 11 atoms have a mass of 176 u 41 8 atoms have a mass of 177 u 59 4...
- Q The reaction N O5 in CC14 solution 2NO2 solution 0 g 2 is of first order in N O5 with rate constant 6 2 10 s What is the value...
- Q 1 8 and 1 2 25 and 1 3 2 and 4 The energy of an electron in first Bohr orbit of H atom is 13 6 eV The energy...
- Q 17 Electronic configuration of an atom 1s 2s 2p6 3s 3p6 3d5 4s 1s 6 2p 2s ORG 3s 3p 3d 4s Choose the correct statement regarding this E C...
- Q The work function for Ag metal is 7 5 x 10 19 J Ag metal is being exposed to the light of frequency 1220 Which is are correct statements 1...
- Q Structure of Atom 231 A light of frequency 1016 Hz is irradiated on a metal surface with threshold frequency equal to 5 1015 Hz What would be the maximum kinetic...
- Q A hydrogen atom and a He atom are approaching each other with speed v 2v respectively The minimum kinetic energy that He atom must have so that both the atom...
- Q Radius of first excited state of Be ion is NCERT Pg 48 1 13 22 pm 2 52 9 pm 3 105 8 pm 4 211 6 pm Energy required...
- Q 13 Which of the following set of quantum numbers is not possible NCERT Pg 56 1 1 n 3 1 2 m 2 s 2 1 2 n 4 1...
- Q 4 Energy of one mole of photons of radiation whose frequency is 2 x 1014 Hz is nearly 1 80 kJ 3 247 kJ NCERT Pg 43 2 153 kJ...
- Q 16 Energy of which orbital is maximum for hydrogen atom NCERT Pg 61 1 6s 3 4d 2 5p 4 5f 17 According to Aufbau principle filling of which orbital...
- Q Electrons are filled in orbitals following Aufbau Principle Pauli s Exclusion Principle and Hund s Principle Quantum number are assigned to get complete information of electrons regarding their energy angular...
- Q 41 When copper metal is treated with dilute nitric acid copper II nitrate and nitric oxide forms Find the coefficient of copper II nitrate in the balanced equation of this...
- Q If according to De Broglie electron moves in a specific orbit like a wave and centripetal f orce only works when a object is moving in circlular path then how...
- Q When electromagnetic radiation of wavelength 310 nm fall on the surface of Sodium electrons are emitted with K E 1 5 eV Determine the work function W of Sodium A...
- Q Which of the following statements is true The maximum number of electrons can be accommodated in M shell is 8 B The atomic radius increases moving from left to right...
- Q If neutron electron proton and a particle have same momentum mv then which of the following is correct All have same de Broglie wavelength All have same velocity O All...
- Q estion No 5 40 If a box containing large number of balls identical in each and every asp which statistics can be applied to balls AO B E statistics BOF...
- Q An atomic orbital X has 2 radial nodes but onlyone angular node An another atomicorbital Y has oneradial node but two angular nodes The correct information s regarding these orbitals...
- Q The approximate size of the nucleus can be calculated by using energy conservation theorem in Rutherford s a scattering experiment i e Total energy initial Total energy final In 1st...
- Q The wave function of two different orbitals X and Y in Be 3 ion are given by 1 3 2 Z 6 60 e 0 2 ao 1 3 1...
- Q 6 Ionization energy of gaseous Na atoms is 495 5 kjmol The lowest possible frequency of light that ionizes a JEE MAINS ONLINE 2014 sodium atom is 3 1 24...
- Q Summary of Dual Nature of Radiation The various phenomena concerning radiation can be divided into three parts i The phenomena such as interference diffraction polarisation etc in which there is...
- Q Which of the following statement s is are incorrect Options 1 The electronic configuration of Cr is Ar 3 d5 4 s Atomic Number of Cr 24 The magnetic quantum...
- Q A H like species is in their excited state A and absorbs a photon of energy 3 868 eV and get excited to a new state B The electron from...
- Q 13 The mass of the nucleus is O A greater than the mass of the protons and neutrons that make up the nucleus OB equal to the mass of the...
- Q th According to Bohr s theory the energy in the n 2 176 10 18 x Z n remove an electron from the 2nd orbit of Li ion orbit is...
- Q If uncertainty in the measurements of position and velocity of electron are equal then minimum uncertainty in its velocity will be A B skipped C 1 2m 1 h am...
- Q 17 The frequency of radiation emitted when the electron falls from n 4 to n 1 in a hydrogen atom will be Given ionization energy of H 2 18 10...
- Q Select the incorrect statement among the following A The minimum energy that an electron in hydrogen atom can have is 13 6 Ev B The energy of an electron in...
- Q IS 2 52 The line at 434 nm in the Balmer series of the hydrogen spectrum corresponds to to th a transition of an electron from the n second Bohr...
- Q Q7 Calculate the velocity total energy and radius of an electron moving in the 4th orbit of Be Given velocity of an electron V 2 19 x 108 cm s...
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