Chemical Bonding and Molecular Structure Test 49

Result

Chemical Bonding and Molecular Structure Test 49

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Weekly Quiz Competition

Question 1
1 / -0

Physical properties of compound depend on:

A
primary forces present in the compound

B
secondary forces present in the compound

C
bond angle of the molecule

D
shape of the molecule
Question 2
1 / -0

Which theory is useful to determine geometrical structure of molecules ?

A
Molecular orbital theory

B
VSEPR theory

C
Resonance theory

D
Quantam mechanics
Question 3
1 / -0

In which of the following pairs , the hybridisation of central atmos is same but molecular geometry is not the same ?

A
$${ SO }_{ 3 },{ CO }_{ 3 }^{ 2- }$$

B
$${ SO }_{ 3 }^{ 2- },{ NH }_{ 3 }$$

C
$${ PCl }_{ 5 },{ POCl }_{ 3 }$$

D
$${ XeF }_{ 2 },{ ICl }_{ 3 }$$

Solution
Question 4
1 / -0

Number of $$ (\sigma)- $$ bonds present in $$ \mathrm{CH}_{4} $$ is:

A
4

B
3

C
2

D
1
Question 5
1 / -0

Which of the following statement is incorrect?

A
The tendency to attract bonded pair of the electron in case of hybrid orbitals follows the order: $$sp > sp^2 > sp^3$$

B
Alkali metals generally have negative value of electron gain enthalpy

C
$$Cs^+(g)$$ releases more energy upon gain of an electron than $$Cl(g)$$

D
The electronegativity values for $$2$$p-series elements is less than that for $$3$$p-series elements on account of small size and high inter electronic configuration
Question 6
1 / -0

In the following i. $$ N_2 \rightarrow N^+_2 \quad ii. O_2 \rightarrow O^+_2 ;\quad $$the electrons respectively are removed from

A
$$ ( {\sigma } 2 p_z)\ and\ ( \pi^* 2p_y\ or\ \pi^* 2 p_x ) $$

B
$$ ( \pi^* 2 p_x )\ and\ ( \pi^* 2p_y\ or\ \pi^* 2 p_x ) $$

C
$$ ( \pi^* 2 p_y )\ and\ ( \pi^* 2p_y\ or\ \pi^* 2 p_x ) $$

D
$$ ( \pi^* 2 p_z)\ and\ ( \pi^* 2p_y\ or\ \pi^* 2 p_x ) $$
Question 7
1 / -0

Arrange the following compounds in decreasing order of their dipole moment.
I
$${\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}}{{\text{H}}_{\text{2}}} - \;{\text{N}}{{\text{O}}_{\text{2}}}\;$$
II
$${\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}}{{\text{H}}_{\text{2}}} - \;{\text{N}}{{\text{H}}_{\text{2}}}\;$$
III
$${\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}}{{\text{H}}_{\text{2}}} - \;{\text{F}}\;$$
IV
$${\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}}{{\text{H}}_{\text{2}}} - \;{\text{CN}}$$

A
$$IV > III > I > II$$

B
$$IV > I > III > II$$

C
$$I > III > IV > II$$

D
$$I > IV > III > II$$

Solution
Question 8
1 / -0

In which of the following the experimental dipole moment is more than what is expected from theory

A

B

C

D
All of these
Question 9
1 / -0

Correct order of dipole moment is :
1) I = II = III 2) I < II < III
3) I > II > III 4) II < III < I

A
1

B
2

C
3

D
4

Solution
Question 10
1 / -0

Number of lone pair present in each molecule of $$H_2O , NH_3$$ and $$C_2H_4$$ respectively.

A
$$1, 2, 1$$

B
$$2, 1, 0$$

C
$$1, 1, 1$$

D
$$2, 1, 2$$