Physics question and answers for July 01, 2023
- Q In which of the following complexes in the bond order of C O is minimum 1 Mn CO 3 Ti Co 2 Cr CO 4 V Co
- Q If W is atomic weight and N is the atomic number of an element then CPMT 1971 80 89 a Number of e W N b Number of on W...
- Q A 100 watt bulb emits monochromatic light of wavelength 400 nm Calculate the number of photons emitted per second by the bulb 20 1 a 3 10 0 s c...
- Q The density of a solution was determined from the mass of a 10 mL sample of the solution on an analytical balance For this experiment each 10 mL sample was...
- Q 18 The radius of the first Bohr orbit of a hydrogen atom is 0 53 x 108 cm The velocity o the electron in the first Bohr orbit is A...
- Q DIRECTION Fill up the table below Check to determine the type of force that most evident for each substance SUBSTANCE H F HHH H C C C H 1 II...
- Q Assertion A In F molecule F F bond is weak Reason R Small size of F atom a A and R both are correct and reason R is correct explanation...
- Q In which of the following arrangements the order is INCORRECT according to the property indicated against it O O O Li Na K Rb Increasing metallic radius I Br F...
- Q Mathematically the uncertainty principle is presented as Axx Ap 27 12 The value of m for d2 orbital is non zero Two electrons occupying the same orbital of an atom...
- Q How many spectral lines will be observed in emission spectrum of hydrogen atom of Hy drogen atom is exposed with a monochrom atic light source for which energy of photon...
- Q Example 7 11 How many grams of NaOH must be dissolved in one litre of the solution to have a solution of pH 12 Solution pH log H O 12...
- Q RS 4 00 Negative Mark s 1 0 The radius of CI ion is 38 larger than that of the F ion but the radius of the Brion is only...
- Q In the following reaction NO 2e NO Select the incorrect statement Hybridisation of central atom gets changed Formal charge on central atom gets changed O Oxidation state of central atom...
- Q Outside any orbital the probability of finding the electron is zero For single electronic atom or ion the most probable distance of electron in an orbital having no radial node...
- Q The ratio of difference between 1st and 2nd Bohr orbits energy to that between 2nd 3rd orbits energy is A B TIN THESE 1 2 1 3 C 27 5...
- Q In a H like species there are two energy levels A and B above the ground state having principal quantum numbers of n and no respectively A sample of this...
- Q The radial wave function for 1s orbit of a single electron species is given by Ti40 Ke 2 where o 2Zr and K is constant ao radius of Ist Bohr...
- Q Sodium emits yellow light with a frequency of 5 09x10 4 Hz when electrons transition from 3p to 3s orbitals I Calculate the energy difference in J between these two...
- Q Spider Man No Way Home 3D Hindi Hindi UA Hindi 3D 09 30 AM 12 45 PM 03 05 PM 10 55 P Spider Man No Way Home Hindi Hindi...
- Q An unielectronic ion of element A atomic number of element A is n has velocity of electron in xth orbit equal to velocity of electron in H atom in nth...
- Q th An unielectronic ion of element A atomic number of element A is n has velocity of electron in x orbit equal to velocity of electron in H atom in...
- Q 59 Which of the following is correct for num electrons number of orbitals and type of c respectively in N orbit 1 4 4 and 8 3 32 16 and...
- Q If n and I are respectively the principle and azimuthal quantum numbers then expression fo calculating total number of electrons in any energ level is 1 n 1 2 21...
- Q 1 n 1 2 21 1 1 1 I n 1 9 1 n 1 2 2 21 1 1 1 I n 1
- Q Incorrect among the following is are a Number of electrons having m 0 in Na are 7 b Energy of 4s orbital is more than 3d in H atom c...
- Q 3 pts For a pair of certain electron donor and acceptor pair A G 1 065x10 J Which scenario would you predict would have the fastest electron transfer A Distance...
- Q s For a pair of certain electron donor and acceptor pair A G 1 065x10 19 J Which scenario would you predict would have the fastest electron transfer A Distance...
- Q Following are the advantages of double beam instrumentation EXCEPT A Compensate for all but most short term fluctuations in the radiant output of the sou as well as for drift...
- Q A mass spectrum is the plot of O O O O 1 point relative abundance of ions against percentage of ions percentage intensity of ions against their mass charge ratio...
- Q 5 i The wavelength of the first line of Lyman series of hydrogen atom is 1215 Calculate the wavelength of the second line of the series and the series limit...
- Q 3 Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C Ca Al F and O a Al Ca...
- Q In the Example of resonating structures of N20 cannot we simply rule out the other two since they do not obey the r ule which states that negative charge should...
- Q Q A chemical compound exists in two forms one of which in is found in 10 more than double of other Their respective weights are 220 5 and 225 6...
- Q An unknown particle with a mass of 9 10x10 28 grams has wavelength of 9 5 um Use this info to calculate the velocity of the unknown particle in m...
- Q The energy of a radiation of wavelength 8000 A is E and energy of a radiation of wavelength 16000 is E What is the relation between thes two 1 E...
- Q 4 1 and 3 are correct 4 54 A hydrocarbon C5H 0 does not react with chlorine in dark 54 Uch Sich C5H 0 3 but gives a single monochoro...
- Q Given Rydberg constant R 105 cm Supposing if electron jumps from M shell to K shell of H atom the frequency of the radiation emitted in cycle s would be...
- Q PC H O CH 3PO4 5HCI 4 CH OH CH CO O CHOCOCH CH3COOH 62 In the following free radical substitution reaction hv CH CH CH CH3 Br 1 R...
- Q Which of the following is are not a favorable condition s for the formation of a ionic bond i Low ionization potential for the easy formation of cation ii High...
- Q 1 Vapor pressure equation for liquid zinc is given by the following expression 6676 log p mmHg 1 7210gT 12 448 T The triple point temperature for zinc is 419...
- Q Which of the following will violates Aufbau principle as well as Pauli s exclusion principle 1 2 3 2p 2 N O 2p m o H
- Q ne figure that is not a direct manifestation of the quantum nature of atoms is JEE Main 2020 Increasing wavelength 1 2 3 Absorption spectrum Internal energy of Ar 300...
- Q The spectrum of hydrogen molecule 18 Calculate de Broglie wavelength of a neutron mass m 1 6x10 27 kg moving with kinetic energy of 0 04 eV 1 146 A...
- Q 4 A certain radiostation broadcasts at a frequency of 900 KHz The wavelength of electromegnetic radiations broadcast by radiostation is 1 900 m 3 2 70 km 2 270 m...
- Q 4 The energy corresponding to second line of Balmer series for hydrogen atom will be 1 12 1 eV 3 2 55 eV 2 1 89 eV 4 13 6...
- Q 31 For the Balmer series in the spectrum of H atom 1 1 n n v RH the correct statements amodica 1 M to VI are 1 As wavelength decreases...
- Q 0 84 g of a metal carbonate reacts exa ctly with 40 ml of N 2 H2SO4 The equi valent weight of the metal carbonate is Why is the equivalence...
- Q 5 If first ionization ptoential of an atom is 36 V then the second excitation potential will be 1 10 2 V 2 12 V 3 27 V 4 32...
- Q 10 One mole of nitrogen is mixed with 3 mole of hydrogen in a closed 3 litre vessel 20 of nitrogen is converted into NH 3 Then K for the...
- Q 16 Calculate the Gibb s energy change when I mole of NaCl is dissolved in water at 25 C Lattice energy of NaCl 777 8 KJ mol AS for dissolution...
- Q Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states 1 3d 4s 2 3d5 4s 3 3d5 4s 4 3d...
- Q 46 Which among the following state symbols are possible for the element X with atomic number 5 A P P and P B P 3 2 and P1 2 C...
- Q A certain electronic transition from an excited state to the ground state of the H atom in one or more steps gives rise to four lines in the visible region...
- Q The wavelength of the photoelectric threshold of metal is 230 nm Determine the K E of photoelectron ejected from the surface by UV radiation emitted from the second longest wavelength...
- Q n and a n 4 1 b n 4 0 c n 3 2 d n 3 1 Can be placed in order of increasing energy as 1 c d...
- Q CF4 is a potent greenhouse gas due to IR absorption and inertness in the atmosphere Let s work through some of the associated factors 3 Find the experimental gas phase...
- Q How does black body radiation explain particle nature of electromagnetic radiation Furthermore how does the EM wave theory fail to explain this phenomenon 7 and arrived at a satisfactory relationship...
- Q 160 A Hydrogen ion moving with a velocity of 10 Q 160 3 10 m s 10 4 Tara m s enter perpendicularly in a magnetic field of 10 4...
- Q 4 the electron is not in a d orbital 4 Calculate the minimum and maximum number of ele which may have magnetic quantum number m spin quantum number s 1...
- Q or stability due higher than that of O Further the effect of increased nuclear charge outweights the to exactly half filled orbitals therefore the A H of N and O...
- Q om the e of the 88 ALLEN A communication satellite of earth which takes 24 hrs to complete one circular orbit eventually has to be replaced by another satellite of...
- Q 1 m me and r 3 mg only GR0086 87 Near the earth s surface time period of a satellite is 1 4 hrs Find its time period if it...
- Q In hydrogen atom spectra if the ratio of wavelengths corresponding to the first of Lyman series and the first line of Balmer series is 9 a the value of a...
- Q ALLEN PLANETARY MOTION WEIGHTLESSNESS 55 Binding energy of moon and earth is GM M GM M 2rum Tam 1 GM M 2 CM M 60
- Q The masses of photons corresponding to the first lines of the Lymann and the Balmer series of the atomic spectrum of hydrogen are in the ratio of 1 5 27...
- Q Shape and orientation respectively of an orbital are given by 1 Azimuthal quantum number and magnetic quantum number 2 Magnetic quantum number and principal quantum number 3 Principal quantum number...
- Q In Y D S E the fringe width is 0 2 mm If wavelength of light is increase by 10 and separation between the slits is increased by 10 then...
- Q A 100 pure sample of a divalent metal carbonate weighing 2 g on complete thermal decomposition releases 448 cc of carbon dioxide at STP The equivalent mass of the metal...
- Q A atoms construct F C C type structure in which B atoms occupied all the octahedral voids If all the atoms are removed from one of the face of unit...
- Q In Young s experiment monochromatic light through a single slit S is used to illuminate the two slits S and S Interference fringes are obtained on a screen The fringe...
- Q WOOO 4 Which of the following statement is true in Your experiment separation between the slits is gradu increased 1 fringe width increases and fringes disappear 2 fringe width decreases...
- Q 4 120 112 ALLEN 46 The number of spectral line obtained in the emission spectrum of H atom in Lyman series when electron jumps from fifth excited state to first...
- Q 3 Will be green 4 Will not be formed WO005 57 InYoung s double slit experiment a mica sheet thickness t and refractive index u is introduced the path of...
- Q Certain amount of urea is dissolved in 200 g o water in order to decrease the vapour pressure o water by 25 The molality of the solution is 1 1...
- Q Photoelectric effect when yellow light shine by pottasium atom Then electron is emitted But pottasium will not show itself colour Only yellow light is reflected And when red colour no...
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