Physics question and answers for July 02, 2023
- Q Uncertainty in position of a particle of 25 g in space is 10 5m Hence uncertainty in velocity ms is Planck s constant h 6 6 x 10 34 Js...
- Q 5 Sketch the radial wavefunction the probability density and the probability distribution function of a 3d orbital At what radius will the probability distribution function reach its maximum value
- Q A sample of hydrogen atoms in ground state absorbs light of x nm If the excited sample emits the radiations of six different photon energies but the detector of these...
- Q 175 Arrange the orbitals of H atom in the increasing order of their energy 3px 2s 4dxy 3s 4pz 3py 4s A 2s 3s 3px 3py 4s 4p 4dxy B...
- Q 15 If n l are principal and azimuthal quantum no respectively then the expression for calculating the total no of electron in any energy level is l n 1 2...
- Q Q1 The coordinates of 3 particles in a cubic simulation cell with an edge length of 20 origin being at the center of the cell are as follows Particle 1...
- Q If an element A shows two cationic states 2 and 3 and form oxides in such a way that ratio of the element showing 2 and 3 state is 1...
- Q i 6 04 eV Match A Energy of ground state of He B Potential energy of I ii 27 2 eV orbit of H atom C Kinetic energy of II...
- Q Two hydrogen atoms collide head on a nd end up with zero kinetic energy Eac h atom emits a photon of wavelength 1 21 6nm Which transition leads to this...
- Q The wavelength of first line of the Lyman series for hydrogen is 1216 A The wavelength for the first line of this series for a 10 time ionised sodiun atom...
- Q Which of the following set of quantum numbers n l m s represents the unpaired electron of Cu ion Atomic number of Cu 29 1 On 3 1 2 m...
- Q Marking scheme o 4 If the correct integer is typed in the provided space o O In all other cases An element undergoes a reaction as shown X 2e X2...
- Q Chemistry Sec 1 Maximum Marks 24 This section has 6 questions The answer to each question is a SINGLE DIGIT INTEGER ranging from 0 to 9 both inclusive Marking scheme...
- Q Find number of orbital s in L shell that is are possible when values of magnetic quantum number m 1 to zero to 1 integral value only The total number...
- Q o O In all other A single electron orbits around a stationary nucless of charge Ze where Z is a constant and e is the magnitude of electronic charge It...
- Q 3 The formula of nickel oxide with metal deficiency defect in its crystal is Nio 98 O The crystal contains Ni and Ni ions The fraction of nickel existing as...
- Q If a photon of energy 14 eV is H atom what is true 1 Atom will be ionised and electron will have a kinetic energy of 14 eV 2 Atom...
- Q o 2 In case if selected typed option is incorrect o 0 In case if no response is typed selected Which of the following statement are correct for the transition...
- Q ed option is incorrect o 0 In case if no response is typed selected The energy needed to excite an electron from ground state to the 1st 2nd and 3rd...
- Q 34 The second order Bragg diffraction of X rays with 1 00 from a set of parallel planes in a metal occurs at an angle 60 The distance between the...
- Q an acidic buffer WA Which one of the following pairs of solution is not Re AIPMT 2015 WASA 1 H CO3 and Na CO3 2 H3PO4 and Na3PO 3 HCIO4...
- Q P Oa The state of an ideal gas is changed in a closed path 1 2 3 4 1 Which of the following is true about work done on the...
- Q 2 The wavelength of photon obtained by electron transition between two levels in H atom and singly ionised He are and respectively then 1 2 2 3 2 2 2...
- Q 13 10 Suppose you need to know the number of moles of a gas from measurements of its pressure temperature and volume We assume that the gas is ideal a...
- Q 35 Four lowest energy levels of H atom are shown in the figure The number of emission lines could be 1 3 2 4 3 5 4 6 4 432...
- Q 5 What is the correct representation of reaction occurring when HCI is heated with MnO 1 MnO4 5CI 8H 2 MnO 2Cl 4H 3 2MnO 4Cl 8H 4 MnO 4HCI...
- Q Name the substance oxidized and redu ced and also identify the oxidizing agen ts and reducing agents in the following reaction 1 Fe203 3Co 2Fe 3Co2 2 3MnO2 4AI 3Mn...
- Q 68 The electron identified by quantum numbers n and 1 1 4 1 1 ii n 4 1 0 iii n 3 1 2 iv n 3 1 1 4...
- Q d 3 35 Which of the following set of quantum number is possible a n 4 1 2 m 2 s 2 b n 4 1 4 m 0 s...
- Q Which one of the following is not the characteristic of Planck s quantum theory of radiation 1 The energy is not absorbed or emitted in whole number multiple of quantum...
- Q If 10 17 of light energy is needed by the interior of human eye to see an object The number of photons of green light 1 550 nm needed to...
- Q In ncert it is written that nitrogen has higher atomic radius in comparison to oxygen and oxygen has higher atomic radius than fluori ne but in byjus video lessons its...
- Q How many photons of light having a wavelength of 5000 are necessary to provide 1 joule of energy 1 2 8 10 8 photons 10 7 photons 10 4 photons...
- Q Which of the following statements is false 1 The energy of red photon is more than the energy of violet photon 2 The momentum of photon is inversely proportional to...
- Q An atom has a mass of 0 02 kg and uncertainty in its velocity is 9 218 x 10 6 m s then uncertainty in position is h 6 626...
- Q Calculate the energy of a photon of sodium light of wave length 5 826 1 3 41 10 J 2 1 3 41 10 1 J 3 3 41 10...
- Q a 2 2 x 10 19J c 4 x 10 20J b 2 10 J d 2 10 20J 1 What is the maximum number of electrons which can accomodated...
- Q 18 If AE is the energy emitted in eV when an electronic transition occurs from higher energy level to lower energy level in H atom the of the line produced...
- Q only 6 In which transition one quantum of e emitted a n 4 n 2 b n 3 n 1 d All of these c n 2 n 1 7...
- Q a 2 4 x 1025 Hz c 1 6 x 1015 Hz 5 The total number of orbitals in the principal shell of He Rhc where R is Rydberg 4...
- Q A 1 kW radio transmitter operates at a frequency of 880 Hz How many photons per second does it emit 1 1 71 x 10 2 1 71 x 1033...
- Q Maxwell said metal continuously absorb light or heat and emits continuously electron as light and this light is one colour but plank opposite to Maxwell plank said light is different...
- Q 1 The value of the spin only magnetic moment for one of the following configurations is 2 84 B M The correct one is a d in strong field ligand...
- Q 49 eV me quantum of energy is 3 n 1 of these or H atom has wavelength er series has wavelength d 12 The ionisation energy of H atom is...
- Q 4 2 55 The maximum and minimum number of electrons in Co having 2 s 1 1 7 0 2 2 5 3 5 2 4 Can t be determined...
- Q The energy required to break one mole of Cl Cl bonds in Cl is 242 kJ mol The longest wavelength of light capable of breaking a single C1 Cl bond...
- Q According to Heisenberg s principle the product of uncertainties and velocities for an 9 1 10 31 kg is A B uncertainty in position electron of mass 22 8 x...
- Q The uncertainties in the velocities of two particles A and B are 0 05 and 0 02 m s respectively The mass of B is five times to tha of...
- Q 2 Photoelectric emission is observed from a metal surface with incident frequencies v v where v v If the kinetic energies of the photoelectrons emitted in the two cases are...
- Q The velocity of particle A is 0 1m sec and that of particle B is 0 05m sec If the mass of particle B is 5 times that of particle...
- Q 40 Which of the following complexes exhibits the highest paramagnetic behaviour Where gly glycine en ethylenediamine and bpy bipyridyl moities At No of Ti 22 V 23 Fe 26 Co...
- Q 151 ion Ma The number the number of electrons with m 0 s In an atom having 2K 8L 8M and 2N electrons are 1 6 3 8 2 2...
- Q b 24 eV d 216 eV wavelength of an electron moving in a s radius of the orbit is given by 2 d 2 2T 41 3 t light gives...
- Q eet light gives off yellow light that has a 600 nm Then oton 12400eV A 0 A this light is 7x 10 s this light is 5 x 10 s...
- Q A first line of Lymen series C last line of Paschen series B first line of Balmer series D last line of Bracket series Ratio of velocity of electron in...
- Q Which one is the wrong statement a The uncertainty principle is AEX At h 4T b Half filled and fully filled orbitals have greater stability due to greater exchange energy...
- Q emitted out to the number of quanta absorbed A photon of 300 nm is absorbed by a gas and then re emits two photons One re remitted photon has wa...
- Q Sir why not answer should be option 4 correct 45 180 The Bohr model for the spectra of a H atom Will be applicable to hydrogen in the molecular form...
- Q 8 The second order Bragg diffraction of X rays with 1 00 A from a set of parallel planes in a metal occurs at an angle 60 The distance between...
- Q The magnitude half of the orbital angular momentum vector of an electron in an orbital is expressed as Vo Into how many components will the vector split if a magnetic...
- Q a Find the location of elements with Z 12 16 8 18 b Find the elements in the above se t that are members of the 1 same grou p...
- Q 49 The atomic number of an element is 17 The number orbitals containing electron pairs in the valency shell is a 8 93 of the d 6 alomo
- Q c Isol 179 Photoelectric emission is observed from a surface for frequency v and v2 of the incident radiation V V If the maximum kinetic energies of the photoelectrons in...
- Q The radial part of schrodinger wave equation for hydrogen atom is 1 0 2 y r 16 4a 2 1 0 o 80 12 e Where a constant o 2r...
- Q Using arbitrary energy units we can calculate that 864 arbitrary units a u are required to transfer an electron in hydrogen atom from the most stable Bohr s orbit to...
- Q A glow worm of mass 5 0 g emits red light 650 nm with a power of 0 1 W entirely in the backward direction What velocity would it accelerate...
- Q Select INCORRECT statement about the following molecular orbital O It is a bonding molecular orbital It is formed by overlapping of lobes of p and d2 which are in same...
- Q The average atomic weight of copper which has two naturally occurring isotopes is 63 5 One of the isotopes has an atomic weight of 62 0 amu a constitutes 69...
- Q Helium atom can be excited to 1s 2p configuration by light of 58 44 nm The lowest excited state with configuration 1s 2s lies 4857 cm1 1 A below the...
- Q mechanism catalyst following step s is are not involved in the of adsorption theory of heterogeneous 1 Diffusion of reactants to the surface of the catalyst ii Sorption of reactant...
- Q 4 V2 V3 79 Consider the following statements 2 v A Electron density in XY Plane in 3dx y is zero B Electron density in XY plane in 3d orbital...
- Q The correct Schrodinger s wave equation for a electron with total energy E and potential energy V is given by 1 Py 20 x y z 2 Pu 20 x...
- Q ect the statement that was not part of Dalton s atomic theory In the atom negatively charged electrons are suspended in a sphere of positive charge b Matter consists of...
- Q Which of the following energy change is less than third Balmer transition in He ion 1 First excitation energy of He ion 2 Third separation energy of Li ion 3...
- Q 128 The first orbital of H is represented by 3 2 4 1 T probability of finding the electron at a distance r from the nucleus in the region dV...
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