Physics question and answers for July 01, 2023
- Q 05 A solid cube and sphere are made of same substance and both have same surface area If the temperature of both bodies 120 C then 1 Both will loss...
- Q 2 The material used in the manufacture of cooker must have K coefficient of thermal conductivity S specific heat of material used 1 high K and low S 3 high...
- Q e 060 to of 59 In which of the following phenomenon heat convection does not take place 1 land and sea breeze 2 boiling of water 3 heating of glass...
- Q 60 In natural convection a heated portion of a liquid moves because 1 Its molecular motion becomes aligned 2 Of moleuclar collisions within it 3 Its density is less than...
- Q I am just unable to understand that over here how can we find the radius of 3rd Bohr orbit of He when orbit of 2nd Bohr orbit of Li 2...
- Q 10m 44 The lengths and radii of two rods made of same 49 The material are in the ratios 1 2 and 2 3 respectively If the temperature difference between...
- Q displacement of a particle is represented by the 2ng equation s 3t 7t 5t 8 where s is in metres and t in seconds The acceleration of the particle at...
- Q 27 The displacement of a particle starting from rest at t 0 is given by s 61 1 The time when the particle will attain zero again is 1 4s...
- Q At 300 K 1000 cm of a solution containing 4 34 g of solute shows osmotic pressure of 2 5 atm What is the molar ma of solute R 0...
- Q 2 An equiconvex lens has a power of 5 dioptre If it is made of glass of refractive index 1 5 then radius of curvature of its each surface will...
- Q 114U INI14UH What will be the ESR frequency of an unpaired electron in a magnetic field of 0 33T given that for the free electron ge 2 and u 9...
- Q below ace 3 The minimum 36 A ray of light propagates from glass refractive me placed over the to cut off all light index 3 2 to water refractive index...
- Q focal length REFRACTION AT PLANE SURFACE SNELL S LAWS TIR 4 30 cm GO0018 25 The colour are characterised by which of following character of light bject and its 4...
- Q 0 Choose the correct statement 1 6d orbital has 4 radial nodes 2 The energy of 7d is higher than energy of 7s in case of hydrogen atom 3 72...
- Q incorrect statement among the following is Particle nature of electromagnetic O radiation is manifested in photoelectric effect O The number of electrons ejected in photoelectric effect is proportional to the...
- Q If a particle of mass 0 5 g is moving with a velocity of 200 m s then the wavelength associated with the particle is h 6 625 10 34...
- Q In an excited sample of Li 2 ions with all the electrons in the same energy state n produces 3 different spectral lines when all of them are now found...
- Q CHEMISTRY IA 58 In a H atom the transition takes place from L to K shell If R 1 08 x 107m the wave length of the light emitted is...
- Q 1 H 2 2740 Hz 3 2350 Hz 4 1685 Hz 32 The string of a violin has a frequency of 440 cpr If the violin string is shortend by...
- Q 6 6 5 KJ 56 Under the same conditions how many mL of 1M KOH and 0 5 M H SO4 solutions respectively when mixed for a total volume of...
- Q 1 6 Which of the following quantum numbers for orbitals in hydrogen atom has a greater energ for electrons i n 3 1 2 and m 1 ii n 3...
- Q 1 When a certain metal was irradiated with a light of frequency 3 2 x 10 6 the photoelectrons had twice the kinetic energy as emitted when the same metal...
- Q 52 Based on equatio E 2 178 x 10 18 J Z 2 n certain con clusions are written Which of them is not correct a The negative sign in...
- Q 52 Based on equati E 2 178 10 18 J 2 Z n certain con clusions are written Which of them is not correct a The negative sign in equation...
- Q Question Number 121 Question Id 8135612201 Question Type MCQ Display Question Number Yes Is Question Mandatory No Single Line Question Option No Option Orientation Vertical Calculate the frequency of the...
- Q Which of the following electronic transitions in hydrogen atom will require the largest amount o energy 1 From n to n 1 2 From n 1 to n 2 3...
- Q Question Number 136 Question Id 8135612216 Question Type MCQ Display Questi Number Yes Is Question Mandatory No Single Line Question Option No Option Orientation Vertical An element has electronic configuration...
- Q Identify the one electron species that exhibits the spectrum above i e give the symbol for the element and the charge on the species OH Het O Be3 N6 O...
- Q statement is 23 565 Box Jeg Je auj a Ke Jeuk spowo Sopgev dod rc D5OED Options 1 www android universityupdates in www universityupdates in www ios universityupdates in www...
- Q 1 Question Number 121 Question Id 7512365241 Question Type MCQ Option Shuffling Yes Display Question Number Yes Single Line Question Option No Option Orientation Vertical HH5 555 13 6 eV...
- Q Highest energy molecular orbital occupied in case 1 of N is 5 2 620 3 px ONLY V 2 2p 4 2py u
- Q Consider the following statements S All group 2 elements are known as alkaline earth metals S Radium salts are used in radiotherapy S3 Hydrated halides of Ca undergo dehydration on...
- Q What should be the frequency of radiation to produce photoelectron having half the kinetic energy of those produced by the radiation of frequency 10 8 sec The critical frequency for...
- Q Hydrogen molecule exist in two nuclear spin isomeric forms Which of the following is not true regarding the two isomers They have different resultant nuclear spin They have identical chemical...
- Q Calculate the energy in joules required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit Also find the wavelength of the...
- Q In the measurement of the quantum efficiency of photosynthesis in green plants it was found that 8 quanta of red light at 6850 were needed to release one molecule of...
- Q c 152 pm 35 A compound MpXq has cubic close packing ccp arrangement of X Its unit cell structure is shown in figure The empirical formula of the compound is...
- Q A non stoichiometric compound of Fe has a formula Feo 930 Percentage fraction of Fe present as Fe2 and Fe3 ions respectively are 80 20 15 85 85 15 90...
- Q a Discuss some general limitations of the Beer Lambert law 1 mar 5 Calculate the number of photons having a wavelength of 10 0 um required to produ 1 0...
- Q Consider a sample of sulfur atoms prepared in the absence of an external magnetic field What is the average value L in multiples of h of the z component of...
- Q 1 Consider the following six electronic configurations remaining inner orbitals are completely filled 3s 3p 3s MAN I III IV V 3s 4s 4s 4s 3p II 3d TAINAL nnnnn...
- Q quency of photons emitted in Paschen series is given by v 3 29 x 10 5 hz 1 1 3 2 n Value of n for photon having wavelength 1285...
- Q 18 The wave number of a given spectral like in the atomic spectrum of a hydrogen like species increases 9 4 times when deuterium nucleus is introduced into its nucleus...
- Q 7 Arrange the following wavelengths 2 of giver emission lines of H atoms in increasing orde a n 3 n 1 b n 12n 10 c n 5 n 3...
- Q 96 What is the frequency of revolution of electro present in 2nd Bohr s orbit of H atom 1 1 016 10 6 S 3 1 626 x 10 5...
- Q If the ionization energy of hydrogen is 313 8 kcal per mol then the energy of the electron in 2nd excited state will be 1 113 2 kcal mol 3...
- Q The kinetic energy of an electron in H like atom is 6 04 eV Find the area of the third Bohr orbit to which this electron belongs and the atom...
- Q 3 B C O N increasing first ionization enthalpy 4 CO SiO SnO PbO increasing oxidising power 2 In context with the transition elements which of the following statement is...
- Q The de Broglie wavelength A associated with a photoelectron varies with the frequency v of the incident radiation as vis threshold frequency A B C D 1 v v 1...
- Q lonisation energy of He is 19 6 x 10 18 stationary state n 1 2 Li J atom 1 The energy of the first is A 4 41 x 10...
- Q lonization energy of He is 19 6 x 10 18 tom 1 A stationary state n 1 of Li is 8 82 x 10 17 Jatom 1 B J atom...
- Q Which of the following is true about the energy of an electron Total energy of electron decreases as we move away from the nucleus Potential energy of electron decreases as...
- Q 58 Energy required to remove an e from M shell of H atom is 1 51 eV then energy of first excited state will be 1 151 eV 3 3...
- Q The velocity of electron in a certain Bohr s orbit of H atoms bears the ratio 1 275 to the velocity of light What is the approximately number of orbit...
- Q Conclusions made from energy expression observations are as follows 1 As we go away from nucleus energy of shell goes on increasing this means energy of electron present in that...
- Q Column I column II contain data on Schrondinger Wave Mechanical model where symbols have their usual meanings Match the columns Column I A 41 A B Y 4 Column II...
- Q A monoelectronic species in energy level with energy X was provided with excess of energy so that it jumps to higher energy level with energy Y If it can emit...
- Q Problem 43 Calculate the average volume available to a molecule in a sample of N at NTP Also report the average distance between two neighbouring molecules if a nitrogen molecule...
- Q 6 The first Lyman transition in the hydrogen spectrum has AE 10 2 eV The same energy change is observed in the second Balmer transition of 1 Li 2 Lit...
- Q changes 4 In flame most of the lines emitted are from the a neutral atom b gaseous atom c gaseous ion d ion 5 Spectral interference is caused especially when...
- Q Units of parts per million ppm or parts per billion ppb are often used to describe the concentrations of solutes in very dilute solutions The units are defined as the...
- Q In a P N junction diode not connected to any circuit 1 The potential is the same everywhere 2 The P type side is at higher potential than the N...
- Q Question No 8 Electrons are emitted from an electron gun at almost zero velocity and are accelerated by an electric field E through a distance of 1 0 m The...
- Q A neutron beam of initial kinetic energy Eo is divided into two beams at point O by some mechanism Thereafter the beams proceed on the path OAC and OBC without...
- Q A hydrogen like atom atomic number Z is in a higher excited state of quantum number n This excited atom can make a transition to the first excited state by...
- Q 33 An electron is accelerated from rest between two points A and B at which the potentials are 20V and 40 V respectively The De Broglie wavelength associated with the...
- Q Q 6 The de Broglie wavelength of an electron emitted from the ground state of an H atom after the absorption of a photon equals of the de Broglie wavelength...
- Q The electrostatic energy of a nucleus of charge Ze is where k is a constant and Ris the kZ e equal to R nuclear radius The nucleus divides into two...
- Q A spectral line results from the transition n 2 ton 1 in the single electron system given below Which one of these will produce the shortest wavelength emission 1 H...
- Q The electron in a hydrogen atom makes a transition from a lower energy state to a higher energy state by absorbing a photon of energy 2 55 eV If the...
- Q An electromagnetic wave of intensity 30 W m is incident on a surface of area 2 m If the surface is perfectly absorbing then the amount of momentum transferred to...
- Q An astronaut is approaching the moon He sends out a radio signal of frequency 5 x 10 Hz and finds out that the freque shift in echo received is 10...
- Q The mass based ratio of U238 and Pb226 in sample of rock is 4 3 If half life of U238 4 5 x 10 yr then age of the rock...
- Q An imaginary particle has a charge equal to that of an electron and mass 50 times the mass of the electron It moves in a circular orbit around a nucleus...
- Q If the series limit wavelength of the Lyman series of hydrogen atom is 912 then the series limit wavelength of the Balmer series of the hydrogen atom is A B...
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