Physics question and answers for July 02, 2023
- Q If the rate constant of a chemical reaction at 500K 700K are 0 02s 1 and 0 07 s 1 respectively its activation energy is In7 1 9 In2 0...
- Q The amount of energy when million atoms of iodine are completely converted into I ions in the vapour state according to the equation 1 8 er is 4 9x10 J...
- Q Calculate the rate of condensation on a 1 5 by 1 5 m vertical plate maintained at 40 and exposed to saturated water vapor at 55 F h fg 2376...
- Q P is the probability of finding the 1s electron of hydrogen atom in a spherical shell of infinitesimal thickness dr at a distance r from the nucleus The volume of...
- Q d 3 84x10 m The wavelength of radiation emitted when electron falls from 4th Bohr s orbit to 2nd in H atom is RH 1 09678x10 7m a 972 nm...
- Q In which of the following arrangements the sequence is not strictly according to the property written against it A B C D CO SiO SnO PbO increasing oxidising power NH3...
- Q 1 Problem about Nearly Free electron in One Dimension Electrons of mass m are confined to one dimension A weak periodic potential described by the Fourier series V x Vo...
- Q Consider that azimuthal quantum number 7 is having n 1 values i e whole number from o to n instead of 0 to n 1 value for any value of...
- Q 3 In Kjeldahl s method of estimation of nitrogen nitrogen is quantitatively converted to ammonium sulphate It is then treated with standard solution of alkali The nitrogen which is present...
- Q C Molecular formula of starch can be represented as C6H1005 n If the gold number of one such starch molecule is 12 96 and 0 01 millimoles of the above...
- Q Q1 Tick Mark the correct answer 1 In atomic absorption the sample is and excited by heat energy generated by a vaporised flame c quantised lamp b atomised burner d...
- Q 4 Square planar Diamagnetic 125 The hardest lanthanide is 1 La 2 Gd 3 Sm 4 Yb 126 Which of the following can not exist together in aqueous solution 1...
- Q 3 NO 4 HNO 1 Air 2 NH 10 The order of increasing reactively of the following compounds towards HCI will be 1 CH CH 11 2 CH C CH...
- Q In an X ray experiment different metals are used as the target In each case the frequency v of the radiation produced is measured If Z atomic number which of...
- Q Among the following irfactant molecules the surfactant that forms micelles in aqueous solution at the lower CMC at ambient condition is 1 CH CH 15N CH3 3Br 2 CH CH...
- Q Ejection of the photoelectron from metal in the photoelectric effect experiment can be stopped by applying 0 5 V when the radiation of 250 nm is used The work function...
- Q The ratio of area of orbit of first excited state of electron to the area of orbit of ground state for hydrogen atom will be A 16 1 B 4...
- Q The wave function for an electron in a hydrogen atom is y Ne Here r is the distance from the distance from the nucleus to the electron and a is...
- Q Which of the following is not permissible set of quantum numbers O n 5 1 4 m 0 s On 4 1 0 m 0 s N O n 3...
- Q A 4 by 4 m horizontal heater is placed in room air at 15 C Both the top and the bottom surfaces are heated to 50 C Estimate the total...
- Q Which transition emits photon of maxim frequency 1 second spectral line of Balmer series 2 second spectral line of Paschen series 3 fifth spectral line of Humphery series 4 first...
- Q 1 The maximum number of atomic orbitals associated with a principal quantum number 5 is 1 9 2 12 3 16 4 25 2 For a d electron the orbital...
- Q The quantum numbers of most energetic electron in Ne atom when it is in first excited state is 1 2 1 0 1 2 2 3 1 1 1 2...
- Q Consider the following statements Matter consists of indivisible atoms p All the atoms of a given elements have identical properties including identical mass Atoms of different elements differ in mass...
- Q Four containers of 2L capacity contains dinitrogen as described below Which one contains maximum num of molecules under similar conditions 1 2 5 gm molecules of N 3 3 01...
- Q 2 If one wanted to determine the mass of a single Argon atom what information would need to be know to complete this calculation Also provide the flow or pathway...
- Q Electron revolving in first orbit of hydrogen with uncertainty of 0 1 of its velocity then uncertainty n its position will be 1 2 66 10 2 cm 3 2...
- Q Small electric strip heaters with a width of 6 mm are oriented in a horizontal position The strips are maintained at 500 C and exposed to room air at 20...
- Q 16 According to Born Oppenheim approximation the total energy of molecule is equ le de F de
- Q c 1 70eV d 4 The value of charge on the oil droplets experimentally observed were 1 6 10 19 and 4 10 19 coulomb The value of the electronic...
- Q The frequency of a wave of light is 12 10 4 s The wave number associated with this light radiation is Question Type Single Correct Type 1 2 3 4...
- Q Total number of enthalpy s out of given nine of M g which is are not associated with conversion of MM LE I E I E L E LE I...
- Q possible from that state is a 6 b 5 d 15 c 7 Imagine an atom made up of a stationary proton and a hypothetical particle of double the mass...
- Q Which of the following phenomena are not justified by wave nature of light a Line spectra of atoms with special reference to hydroge b Variation of heat capacity of solids...
- Q The minimum uncertainty in de Broglie wavelength of an electron accelerated from rest by a potential difference of 6 0V if the uncertainty in measuring 1 the position is nm...
- Q In a sample of hydrogen atoms all the atoms are in a particular excited state If the emission spectrum of this sample has only 4 spectral lines in the visible...
- Q 3 When an electron de excites from higher orbit in H atom two radiations are emitted out in Paschen and Lyman series The wavelength of radiation emitted out in Lyman...
- Q R n 2 n 2 4n 4n d 1 mole of atom The energy emitted when electron of 1 09 atom of hydrogen undergoes transition giving the spectral lines of...
- Q The standard emf of the cell Pt s H g HBr aq AgBr s Ag s was measured over a range of temperatures and the data were fitted to the...
- Q For which of the following reaction AH AU PCI5 g PCl3 g Cl g CO g H O g CO g H g CaCO3 s CaO s CO g N...
- Q The wavenumbers of the three normal modes of H O are 3656 7 cm 1594 8 cm and 3755 8 cm Evaluate the vibrational partition function at 1500 K
- Q Common ion effect will observed in the aqueous solution of NaCl HCI NaCl CH3COOH CH3COONa NaOH CH3COOH HCI
- Q One mole of gas occupying 3 litre volume is expanded against a constant external pressure of one atm to a volume of 15 litre The work done by the system...
- Q Wrong statement regarding methyl carbonium ion CH3 A B C It is sp2 hybridised Vacant orbital is sp hybridised Vacant orbital is perpendicular to molecular planar and in pure p...
- Q Electron arrangements H 25 19 Na Mg Be K 20 Ca BID IVE 21 Sc Ti 23 V xx xx C 24 VID xx Periodic Table of the Elements VI...
- Q Question No 33 Chem Section A This section contains 35 SINGLE CORRECT TYPE questions Each question has 4 choices 1 2 3 and 4 out of Select the interhalogen of...
- Q In 14N if mass attributed to electrons were double the mass attributed to protons were halved th atomic mass would become approximately 1 Halved 2 Doubled 3 Reduced by 25...
- Q 3 For the azimuthal quantum number the to number of magnetic quantum number is given 1 2 3 4 m 1 2 m 1 2 2m 1 2 2m 1...
- Q 49 The primary and secondary valences of the central atom of a schematic representation of given complex are respectively 1 6 6 H O H O 9 C plap OH...
- Q ays that pairing will not done until each orbital will have atleast one electron so 3 ption satisfy hunds rule plss explain un 4 2021 9 28 12 PM Answered...
- Q An electron in a hydrogen atom is in gr ound state It is excited to a state wher e its path length is five times its de Bro glie wavelength...
- Q 5 Which of the following is true according to variational theorem I The ground state energy of a quantum mechanical system is zero II III w H w v v...
- Q 13 An energy of 24 6 eV is required to remove o the electrons from a He atom The energy requir remove both the electrons from He atom is a...
- Q Magnesium reacts with an element X to form an ionic compound If the ground state electronic configuration of X is 1s 2s 2p the simplest formula for this compound is...
- Q The wave number of the spectral line in the emission spectrum of hydrogen will be equal to 8 9 times the rydberg constant if the electron jumps from a n...
- Q Consider the lons given below along with their size w 100 pm P x 150 pm y 200 pm Identify the incorrect statement O The solid wR undergo Frenkel defect...
- Q In given figures of FCC unit cell a plane is shown in which certain arrangement of atoms are find here find out number of planes in which given arrangement of...
- Q der the following series of reactions Cl NaOH NaCl NaClO H O NaClO NaCl NaClO NaCIO NaClO NaCl How many moles of NaCIO are obtained after the completion of reactions...
- Q The figure that is not a direct manifestation of the quantum nature of atoms is Rb 1 1 Internal 1 energy of Ar 3 1 300 400 500 600 Increasing...
- Q Two parallel planes 90 by 60m are separated by a distance of 60 cm One plane is maintained at a temperature of 800 K and has an emissivity of 0...
- Q 87 Consider the following reactions i NaNO HCI 0 5 C ii B naphthol NaOH 88 P The compound P is NH 2 Bry H O CH Colored Solid C...
- Q 11 If the wave number of 1st line of Balmer series of H atom is x then 108 x A Wave number of 1st line of lyman series of the...
- Q electron position is en momentum which the uncertainty in electron 9x10 28g 1x 109 cm s 1 According to the Bohr Theory which of the following transitions in the hydrogen...
- Q BEGINNER S BOX 6 A neutral atom of an element has 2K 8L 11 M and 2N electrons The number of p electrons in the atom are 1 2 212...
- Q 45 Total no of voids in 0 5 mole of a compound formin closed packed structure are hexagonal a 6 022 1023 b c 9 033 x 1023 d 3...
- Q In which one of the following the number of protons is greater than neutrons but number of protons is less than the number of electrons Kerala PMT 2008 b SO...
- Q 10 Two electrolytic cells containing AgNO3 abd CuSO4 solution connected in series A steady current of 2 5A was passed till 1 078g of Ag is deposited How long did...
- Q The compound of the highest acidity is OH b c 2 2 Dimethylbutane OH HO 2 3 Dimethyl 2 butene undergoes catalytic hydrogenation to give a 2 3 Dimethylbutane b...
- Q A hypothetical element Z exists in nature as two isotopes Z65 and Z67 with their relative abundances 25 75 respectively Then the average atomic mass in u of element Z...
- Q If A is the wavelength of the line for jump of the electron from 7th to 6th orbit and A that of the line for jump from 6th to 5th...
- Q Which graph is true for 4p orbital of H like atom RPF Radial probability function H 4 RPF A RPF B RPF C RPF mn D RPF Your Answer D...
- Q 1 dien 2 tri n 3 en 4 dmg Arrange the following compounds in order of increasing dipole moment Increasing dipole moment I Toluene II III o dichlorobenzene m dichlorobenzene...
- Q Consider a two level system of particles that is each particle can either be in the ground or the exited state The energy separation is A 2 kB 500K At...
- Q Which of the following statement is are CORRECT A cation is smaller than an anion if they are isoelectronic Out of second period anion fluoride ion is large in size...
- Q 1 Number of significant figures in 10 3406g is 2 2 4 6 15 HO 3 3 ACES 74 5g of a metallic chloride contains 35 5g of chlorine The...
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