Physics question and answers for July 02, 2023
- Q Which of the following statement is INCORRECT Li is harder than the other alkali metals In Solvay process NH3 is recovered when the solution containing NH CI is treated with...
- Q Electronic configuration of some elements is given in column I and their electron gain entalpies are given in column II Match the electronic configuration with electron gain enthalpy and select...
- Q ction is C 1 42 An element A in a compound ABD has oxidation number A It is oxidised by Cr O2 in acidic medium In the were used for...
- Q Which of the following is wrong a Cathode rays have constant e m ratio b e m ratio of anode rays is not constant c e m ratio of protons...
- Q possible values of n l and m for this electron Question Type Single Correct Type 1 n 3 l 0 m 0 2 n 3 l 1 m 1 0...
- Q Which of the following information is not correct about principal quantum number n 1 As value of n increases the energy of the orbit increases 2 As value of n...
- Q 68 The wavenumber of a radiation whose frequency is 7 5 10 s 1 is 1 1 25 m 1 2 0 25 m 1 3 2 5 m 1...
- Q 2 Energy and size of the shell is determined by 1 Principal Quantum Number 2 Azimuthal Quantum Number 3 Magnetic Quantum Number 4 Spin Quantum Number 3 The ratio of...
- Q Which of the following statements is not correct regarding to galvanic cell Question Type Single Correct Type 1 Cell reaction is spontaneous from left to right if Ecell 0 2...
- Q The orbital angular momentum of an electron present in 3p orbital is 1 2h 2 Zero 3 6 h 4 2 2h Maximum number of orbital s in an atom...
- Q Test 01 Code A 84 In which of the following orbital diagrams Pauli s exclusion principle Hund s rule of maximum multiplicity and Aufbau principle all are violated 3s 1...
- Q In the Bohr s model for unielectronic species following symbols are used Radius of nth orbit with atomic number z Potential energy of electron in nth orbit with atomic number...
- Q 54 55 An organic compound A contains 20 C 46 66 N and 6 66 H It gave NH gas on heating with NaOH The organic compound A could be...
- Q d 4 0 51 The most probable velocity of a gas molecule at 298 Ki 300 m sec Its RMS velocity in m s is a 420 b 245 c...
- Q Which of the following configuration has minimum Ist ionization potential O1s 2s O1s 2s 2p O 36 Kr 4d 0 5s 5p5 O 54 Xe 4f14 5d10 6s 6p5
- Q 40 The ratio of de broglie wavelength of a deuterium atom to that of a particle when the velocity of former is five times greater than that of latter is...
- Q 35 Five ionization energy values in kJ mol are listed below 1010 E 1290 E 376 E 870 E 830 E 1010 E These are a Successive ionization energies for...
- Q 14 If you are given Avogadro s number of atoms of a gas X If half of the atoms are converted into X energy AH The IE of X is...
- Q 25 An electron in an atom undergoes transition in such a way that its kinetic energy changes from x to the change in potential energy will be 4 3 a...
- Q The nucleus of an atom is located at x y z 0 If the probability of finding an s orbital electron in a tiny volume around x P y z...
- Q 34 The radius of the first orbit of hydrogen atom is 0 52 x 10 8 cm The radius of the first orbit of Het ion is a 0 26...
- Q a 0 002 b 0 1 c 0 5 21 The ionisation energy of He is 19 6x 10 energy of the first stationary of Li2 is a 2 2...
- Q 39 The uncertainty in the velocity of particle of mass 6 626x10 28 Kg is 10 m sec What is the uncertainty in its position in nm a 1 2...
- Q The ionization energy of He atom in the ground state may be a 13 6 eV b 54 4 eV c 108 8 eV The binding energy for the third...
- Q c AR AR 1 d 2 1 96 Ionization potential of hydrogen atom is 13 6 eV Hydrogen atoms in the ground state are excited by monochromatic radiation of photon...
- Q 4 0 g of caustic soda NaOH mol mass 40 contains same number of sodium ions as are present in a 10 6 g of Na CO mol mass 106...
- Q 10 Two elements X and Y combine in gaseous state to form XY in the ratio 1 35 5 by mass The mass of Y that will be required to...
- Q What minimum number of atoms ions should be present in a sample of H like species so that a maximum of 6 spectral lines can be produced of electronic transition...
- Q s BOOKLET 1 In a mixture of sample of H atoms and He ions electrons in all the H atoms and He ions are present in n 4th state Then...
- Q In the Rutherford Gold foil experiment he bombarded alpha par ticle i e He nuclei He2 ion which contained 2protons and 2neutrons on a gold foil through which he acknowledged...
- Q sion and Absorption Spectra The spectrum of radiation emitted by a substance that has absorbed energy is called an emission spectrum Atoms molecules or ions that have absorbed radiation are...
- Q 38 If the ionization energy of He is 19 6 10 18 J per atom then the energy of Be3 ion in x 34 second stationary state is a 4...
- Q What minimum tube voltage is required to excite the KB and LB series of lines for rubidium Rb A 15 0 kV for KB 1 75 kV for LB B...
- Q Two solids dissociate as follows A s B g C g Kp x atm D s C g E g K yatm P2 The total pressure when both the solids...
- Q For 3s orbital of hydrogen atom the normalised wave function is given by 3 2 1 1 18r 2r 813 80 10 The above mentioned orbital 3s has two nodes...
- Q Match the parameters of column l with column Il as they are directly proportional Column l A f B T C of 15 E P Q R Column II n...
- Q The absolute enthalpy of neutralisation of the reaction MgO s 2HCl aq MgCl aq H O 1 will be weak as JAIPMT Prelims 2005 1 Less than 57 33 kJ...
- Q 1 30 The measurement of the electron position is associated with an uncertainty in momentum which is equal to 1 x 10 18 g cm s 1 The uncertainty in...
- Q Assuming Heisenberg Uncertainity Principle to be true what could be the minimum uncertainty in de brogli wavelength of a moving electron accelerated by Potential Difference of 6 V whose uncertainty...
- Q 5 E 313 6 n2 kcal mole If the value of E 34 84 kcal mole to which value does n correspond 1 4 3 2 2 3 4 1
- Q 3 The ionization energy of the electron in the lowest orbit of hydrogen atom is 13 6 eV The energies required in eV to remove electron from three lowest orbits...
- Q According to Bohr s theory En Total energy V Potential energy Match the following C D K Kinetic energy n Column I A V K n B If radius of...
- Q 1 163 167 3 168 2 171 2 172 3 175 3 176 4 179 3 180 4 183 3 184 4 187 4 188 3 169 4 173 2...
- Q For H spectrum electron transition takes place from n 5 ton 2 then emitted wavelength of photon is 434 nm The wave length of photon in electron transition from n...
- Q An incident UV light having wave length is incident on metal surface and the ejected electron has the velocity of V Another UV light having wave length is incident on...
- Q 23 Which combinations of quantum numbers n I m and s for the electron in an atom does not provide a permissible solutions of the wave equation 1 3 2...
- Q For which of the following sets of four quantum numbers an electron will have the highest energy I 1 3 2 4 3 4 2 2 1 To 1 2...
- Q Bohr s theory accounts for the stability and line spectrum of Li ion Bohr s theory was unable to explain the splitting of spectral lines in the presence of a...
- Q 21 The correct order of energy difference between adjacent energy levels in H atom 1 E E E E E E 2 E E E E E E 3 E...
- Q 29 Which is the correct graphical representation based on photoelectric effect L K E K E Intensity of light 1 1 11 3 III IV II IV KE No of...
- Q Which of the following statements is not correct for ar electron that has the quantum numbers n 4 and m 2 a The electron may have the quantum number s...
- Q transition is inversely related to difference in the energy levels involved in the transition A Zn II salts are diamagnetic R Zn ion has one unpaired electron
- Q 6 The Bohr orbit radius for the hydrogen atom n is approximately 0 530 A The radius for the excited state n 2 orbitis in A 1 4 77 2...
- Q A Electronic energy for hydrogen atom of different orbitals follow the sequence 1s 2s 2p 3s 3p 3d R Electronic energy for hydrogen atom depends only on n and is...
- Q 1 st 43 The frequency of radiation emitted when the 4 to n 1 in a hydrogen ionization energy of and h 6 625 x 10 4 Js electron falls...
- Q Q23 Which L C A O of two O atoms produce given shape molecular orbitals If internuclear axis is ID Q 529170 Options are A 2s and 2s Wave functions...
- Q 16 Number of spectral lines falling in Balmer series when electrons are de excited from th shell will be given as 1 n 2 in UV 2 n 2 in...
- Q Q15 For the electrons of oxygen atom which of the following statements is correct a Zeff for an electron in a 2s orbital is the same as Zeff for an...
- Q R Orbital angular momentum depends on orientation of orbitals A Energy of electron is taken negative R Energy of electron at infinity is zero
- Q 30 The energy of second Bohr orbit of the hydrogen a is 328 kJ mol hence the energy of fourth E orbit would be AIPMT Prelims 20 1 41 kJ...
- Q na Bohr s model of an atom when an umps from n 1 to n 3 how much ene me emitted or absorbed 1 2 389 10 12 ergs 2...
- Q 3 If each orbital can hold a maximum of 3 electrons the number of elements in 4th period of periodic table long form is a 48 2 27 b 54
- Q 1 19 Ferric oxide crystallises in a hexagonal close packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions Derive the formula of...
- Q 5 The energy of electron in first energy level is 21 79x 10 12 erg per atom The energy of electron in second energy level is a 54 47 x...
- Q The number of waves made by a Bohr electron in H atom for one complete revolution in its 3rd orbit are A 1 B 2 C 3 D 4
- Q If in a photoelectric cell the wavelength of incident light is changed from 4000 A to 3000 A then change in stopping potential will be 1 0 66 V 2...
- Q Which of the following statements is correct 1 The electronic configuration of Cr is Ar 3d 4s Atomic No of Cr 24 2 The magnetic quantum number may have a...
- Q The radial probability function which provides us the probability of finding an electron in a spherical shell of thickness dr at a distance of r from the nucleus for the...
- Q 8 An organic compound containing C H and N gave the following analysis C 40 H 13 33 N 46 67 Its empirical formula would be 1 CH N 3...
- Q Choose the correct statement among the following Radial distribution function y 4r dr give probability at a particular distance along one chosen direction p r give probability density at a...
- Q 3 A mixture of methane and ethene in a molar ratio ofx y has an average molecular mass of 20u The mean molar mass when they are mixed in the...
- Q Mr Santa has to decode a number ABCDEF where each alphabet is represented by a single digit Suppose an orbital whose radial wave function is represented as Yk ek 5kr...
- Q Subjective Integer Type 66 What is the value of A 2Z 12 for Ra236 88
- Q In face centred cubic lattice tetrahedral voids are present at O each face diagonal O each cube diagonal O body centre Orach nin
- Q On absorbing light of wavelength 3800 bromine molecule undergoes dissociation and form atoms The kinetic energy of one bromine atom assuming that one quantum of radiation is absorbed by each...
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