Atomic Structure (KVPY Stream-SA (Class 11) Chemistry): Questions 7 - 10 of 30

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Question number: 7

» Atomic Structure » Bohr Model of Hydrogen Atom

MCQ▾

Question

According to Bohr’s theory, the electronic energy of the hydrogen atom in nth Bohr’s orbit given by En=21.76×1019z2n2J . Calculate the longest wavelength of light that will be needed to remove electrons from 3rd Bohr orbit of He+ ion.

Choices

Choice (4) Response

a.

2.06×1018J

b.

2.76×10 - 18J

c.

9.67×1019J

d.

7.79×1016J

Question number: 8

» Atomic Structure » Pauli's Exclusion Principle

MCQ▾

Question

What will be the maximum number of electrons in a sub-shell l=3andn=4 ?

Choices

Choice (4) Response

a.

7

b.

10

c.

2

d.

14

Question number: 9

» Atomic Structure » Extra Stability of Half-Filled & Completely Filled Orbitals

MCQ▾

Question

Choose the correct options -

(1) Mass defect = Total mass of nucleons + atomic mass

(2) The mass defect converted into energy. This energy called the binding energy

(3) Binding energy could not measure of stability of the nucleus.

(4) If the value of binding energy is negative, the product nucleus will be less stable than the reactant nucleus

Codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 10

» Atomic Structure » De-Broglie's Relationship

MCQ▾

Question

Iodine molecule dissociates after absorbing light of 4500Å. If each molecule absorbs one quantum radiation, calculate the kinetic energy of iodine atom. (Bond energy of I2=240×103kJmol ).

Choices

Choice (4) Response

a.

9.67×1019J

b.

2.16×1020J

c.

2.84×1019J

d.

3.68×1024J

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