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Recent questions and answers in Class XI Chemistry
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In Rutherford’s experiment, generally the thin foil of heavy atoms, like gold, platinum
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Sep 5
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In Milikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays.
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A certain particle carries 2.5 × 10–16C of static electric charge. Calculate the number of electrons present in it.
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The diameter of zinc atom is 2.6 A. Calculate (a) radius of zinc atom in pm
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2 × 108 atoms of carbon are arranged side by side. Calculate the radius of carbon atom
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If the diameter of a carbon atom is 0.15 nm, calculate the number of carbon atoms
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Calculate the energy required for the process
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What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition n = 4 to n = 2 of He spectrum?
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Show that the circumference of the Bohr orbit for the hydrogen atom
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How many electrons in an atom may have the following quantum numbers?
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Explain, giving reasons, which of the following sets of quantum numbers are not possible.
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Using s, p, d notations, describe the orbital with the following quantum numbers.
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An atomic orbital has n = 3. What are the possible values of l and ml
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May 28
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Class XI Chemistry
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Give the number of electrons in the species
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May 28
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An atom of an element contains 29 electrons and 35 neutrons. Deduce
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May 28
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An electron is in one of the 3d orbitals.
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Apr 20
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What is the lowest value of n that allows g orbitals to exist?
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Apr 20
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Write the electronic configurations of the following ions
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Apr 20
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Which of the following are isoelectronic species i.e., those having the same number of electrons
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Apr 20
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The mass of an electron is 9.1 × 10–31 kg. If its K.E. is 3.0 × 10–25 J, calculate its wavelength.
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