Structure of Atom Test

Result

Structure of Atom Test - 77

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements in relation to the hydrogen atom is correct?

A
3s orbital is lower in energy than 3p orbital.

B
3p orbital is lower in energy than 3d orbital.

C
3s and 3p orbital are of lower energy than 3d orbital.

D
3s, 3p and 3d orbital all have the same energy.

Solution
Question 2
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Which is correct statement about proton?

A
Proton is nucleus of deuterium.

B
Proton is ionized oxygen molecule.

C
Proton is ionized hydrogen atom.

D
None of these

Solution

When a hydrogen atom loses an electron, it becomes an ion having only one proton and no electrons. So, we can say that a proton is an ionised hydrogen atom.

$$H \xrightarrow{Loses\ electron} H^+ (proton)$$
Question 3
1 / -0

The time taken by the electron in one complete revolution in the $$n^{th}$$ Bohr's orbit of the hydrogen atom is

A
Inversely proportional to $$n^2$$

B
Directly proportional to $$n^3$$

C
Directly proportional to $$\dfrac{h}{2\pi}$$

D
Inversely proportional to $$\dfrac{n}{h}$$

Solution
Question 4
1 / -0

The electrons identified by quantum numbers $$n$$ and $$l$$:
(1) $$n=4,l=1$$ (2) $$n=4,l=0$$
(3) $$n=3,l=2$$ (4) $$n=3,l=1$$
can be placed in order of increasing energy as

A
$$(4)<(2)<(3)<(1)$$

B
$$(2)<(4)<(1)<(3)$$

C
$$(1)<(3)<(2)<(4)$$

D
$$(3)<(4)<(2)<(1)$$

Solution
Question 5
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The electrons identified by quantum number $$n $$ and $$l$$:
$$(1)n=4,l=1\quad \quad \quad (2)n=4,l=0\\ (3)n=3,l=2\quad \quad \quad (4)n=3,l=1$$

The correct order of increasing energy is:

A
(4) < (2) < (3) < (1)

B
(2) < (4) < (1) < (3)

C
(1) < (3) < (2) < (4)

D
(3) < (4) < (2) < (1)

Solution
Question 6
1 / -0

The energy of an electron in first Bohr orbit of $$H$$ atom is $$-13.6 eV$$. The possible energy value (s) of excited state(s) for the electron in the Bohr orbits of hydrogen is/are:

A
$$- 3.4\ eV $$

B
$$- 4.2 \ eV $$

C
$$6.8 \ eV $$

D
$$+6.8 \ eV$$

Solution
Question 7
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Which one is the ground state?

A

B

C

D

Solution
Question 8
1 / -0

Consider the following given species and find out, for which Bohr's atomic model is not applicable?

A
$$
1^{H^{2}}
$$

B
$$He^{ + }$$

C
$$
H^{+}
$$

D
$$
\mathrm{Li}^{2+}
$$

Solution
Question 9
1 / -0

Which of the following gas is mono-atomic?

A
Chlorine

B
Helium

C
Hydrogen

D
Oxygen
Question 10
1 / -0

In an atom $$ 2 \mathrm{K}, 8 \mathrm{L}, 8 \mathrm{M}, 2 \mathrm{N} $$ electrons, the number of electrons present.If $$ \mathrm{m}=0, \mathrm{s}=1 / 2, $$ are:

A
$$6$$

B
$$2$$

C
$$8$$

D
$$16$$