Structure of Atom Test

Result

Structure of Atom Test - 18

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Weekly Quiz Competition

Question 1
4 / -1

The maximum number of electrons in a subshell is given by the expression

A
4l – 2

B
4l + 2

C
2l + 1

D
2n²
Question 2
4 / -1

If r is the radius of first orbit, the radius of nth orbit of the H atom will be

A
rn²

B
rn

C
r/n

D
r²n²
Question 3
4 / -1

At 200°C hydrogen molecules have velocity 105 cm sec^–1. The de-Broglie wavelength in this case is approximately

A
2 Å

B
1000 Å

C
100 Å

D
10 Å
Question 4
4 / -1

The number of electrons in 3d shell for element with atomic number 26 is

A
4

B
6

C
8

D
10
Question 5
4 / -1

In a set of degenerate orbitals the electrons distribute themselves to retain similar spins as far as possible. This statement is attributed to

A
Pauli’s exclusion principle

B
Aufbau principle

C
Hund’s Rule

D
Slater rules
Question 6
4 / -1

If uncertainty in the position of electron is zero, the uncertainty in its momentum would be

A
zero

B

C

D
infinite
Question 7
4 / -1

The radius of second Bohr’s orbit is

A
0·053 nm

B
0·053/4 nm

C
0·053 × 4nm

D
0·053 × 20 nm
Question 8
4 / -1

For which of the following sets of quantum -numbers an electron will have the highest energy ?

A
3, 2, 1, 1/2

B
4, 2, -1, 1/2

C
4, 1, 0, -1/2

D
5, 0, 0, 1/2
Question 9
4 / -1

The uncertainty in the position of an electron (mass 9.1 × 10^–28 g) moving with a velocity of 3.0 x 10⁴ cms^–1 accurate up to 0.011% will be

A
1·92 cm

B
7·68 cm

C
0·175 cm

D
3·84cm
Question 10
4 / -1

The radius of hydrogen atom in the ground state is 0·53 Å, the radius of ₃Li²⁺ in the similar state is

A
1·06 Å

B
0·265Å

C
0·17 Å

D
0·53 Å

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Re-Attempt Weekly Quiz Competition

Structure of Atom Test - 18

Result

Structure of Atom Test - 18

Score

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Rank

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SHARING IS CARING

Question 1

4l – 2

4l + 2

2l + 1

2n2

Question 2

rn2

rn

r/n

r2n2

Question 3

2 Å

1000 Å

100 Å

10 Å

Question 4

4

6

8

10

Question 5

Pauli’s exclusion principle

Aufbau principle

Hund’s Rule

Slater rules

Question 6

zero

infinite

Question 7

0·053 nm

0·053/4 nm

0·053 × 4nm

0·053 × 20 nm

Question 8

3, 2, 1, 1/2

4, 2, -1, 1/2

4, 1, 0, -1/2

5, 0, 0, 1/2

Question 9

1·92 cm

7·68 cm

0·175 cm

3·84cm

Question 10

1·06 Å

0·265Å

0·17 Å

0·53 Å

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2n²

rn²

r²n²