FSC Chemistry MCQs Chapter 5 Class 11





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Chemistry Ch 5 Class 11 ATOMIC STRUCTURE

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How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?

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Which of the following best describes the emission spectrum of atomic hydrogen?

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If an electron jumps from fourth to first orbit, which of the following series will it show?

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Which of the following statements is correct?

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Mass of electron in a.m.u is:

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Which orbitals always possess same energy:

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The spectrum of He is expected to be similar to that of:

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Which is the configuration of Cr?

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An element has configuration 2, 8, 1. It belongs to, ______.

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When alpha particles are bombarded on beryllium

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The charge on one proton is:

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Which of the following is the electronic configuration of 19K?

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Quantum number values for ‘2p’ orbitals are:

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The radii of the second orbit of the hydrogen atom calculated from Bohr’s model is:

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Which pair has 1 electron in it’s ‘s’ orbital?

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The number of electrons present in n=2 , l = 1 and m = 1, 0, -1 are:

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17 / 70

Which of the following has lowest e/m ratio?

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A 4s orbital has:

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P.E of an electron in the orbit of an atom Is

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The electronic configuration of iron is:

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X-rays are defined as:

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The maximum number of electrons that an orbital can accommodate is/are:

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Many elements have fractional atomic masses. This is because:

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The relationship between quantum number n and l is:

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Which of the following has the maximum number of unpaired electrons?

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Which of the following does not show variable valency?

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If uncertainty in the position of an electron is zero the uncertainty in its Momentum is?

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The correct order of orbitals is:

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d subshell has

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Shape of the orbital occupied by an electron is defined by:

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The ground state of an atom corresponds to a state of :

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If an electron makes a transition from 4th orbit to inner orbits, then the wavelength for which the radius is maximum, lies in which of the following series?

33 / 70

) The velocity of electron in outermost shell Is?

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Which of the following does not have an inert gas configuration?

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Which of the following orbital will be filled first than 4p?

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Spectrum of which series is in the visible region?

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For a multi-electron atom, the highest energy level among the following is:

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Breaking of neutron produces?

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Spectrum of which series is in the UV region?

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Diameter of Hydrogen atom is?

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Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:

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Which of the following fundamental particles have the same mass/kg?

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Electronic configuration of K is:

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Bracket series of 14-atom is in which of the following regions of electromagnetic spectrum?

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Maximum ____ electrons can be placed in one orbital:

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J.J Thomson determined the:

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The Balmer series lies in which region of the electromagnetic spectrum?

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The Neutron was discovered by:

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The amount of energy associated with quantum of radiation is directly proportional to:

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If an election jumps from 6th orbit to 2nd orbit then decrease in radius will be?

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If an electron of hydrogen atom jumps from 5th orbit to 7’h orbit, its atomic radius increases

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Which quantum number decides energy of orbitals?

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The radius of the third Bohr orbit is:

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54 / 70

When B- particles are sent through a thin metal foil, most of them go straight through the foil as:

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55 / 70

Which of the following quantum numbers are for p-subshell?

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Choose the value of the Rydberg constant among the following values:

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The lightest positive rays obtained is from:

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In a discharge tube, at room pressure there is

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Diameter of an atom is in the range of?

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60 / 70

Which one of the following is not an isotope of hydrogen:

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“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:

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The amount of energy released by absorbing an electron in the valence shell is:

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The atomic number Z of an atom represents the:

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64 / 70

What are the values of orbital quantum number/0 and magnetic quantum number(m) for subshell?

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The difference between soft and hard X-rays is of:

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The maximum number of electrons in an atom with n=3 and l=2 is:

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67 / 70

Electronic configuration of M2+ ion is 2, 8, 14 and its atomic weight is 56 amu. The number of neutrons in its nucleus are:

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The quantum numbers +½ and -½ for the electron spin represent:

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Number of transitions possible for an electron in the 6th shell are

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The maximum possible number of electrons a shell ‘n’ can accommodate is given by:

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