Chemical Bonding and Molecular Structure Test 48

Result

Chemical Bonding and Molecular Structure Test 48

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Weekly Quiz Competition

Question 1
1 / -0

Diatomic molecule has a dipole moment of 1.2 D.If its bond is $$1.0 \mathring{A}$$, what fraction of an electronic charge exists on each atom?

A
11 %

B
20 %

C
25 %

D
15 %

Solution
Question 2
1 / -0

The acid containing S-O-O-S bond is

A
$$H_2SO_5$$

B
$$H_2S_2O_7$$

C
$$H_2S_2O_6$$

D
$$H_2S_2O_8$$

Solution
Question 3
1 / -0

In which of the following molecules number of lone pairs and bond pairs on central atom are not equal?

A
$$H_2O$$

B
$$I^-_3$$

C
$$O_2F_2$$

D
$$SCl_2$$
Question 4
1 / -0

Compound having zero dipole moment is

A
$${\text{C}}{{\text{H}}_{\text{3}}}{\text{Cl}}$$

B
$${\text{C}}{{\text{H}}_{\text{2}}}{\text{C}}{{\text{l}}_{\text{2}}}$$

C
$${\text{CHC}}{{\text{l}}_{\text{3}}}\;$$

D
$${\text{CC}}{{\text{l}}_{\text{4}}}$$

Solution
Question 5
1 / -0

Of the following molecules, the one, which has permanent dipole moment, is-

A
$$\mathrm { SiF } _ { 4 }$$

B
$$\mathrm { BF } _ { 3 }$$

C
$$\mathrm { PF } _ { 3 }$$

D
$$\mathrm { PF } _ { 5 }$$

Solution
Question 6
1 / -0

Which is not true according to VBT ?

A
A covalent bond is formed by the overlapping of orbitals with unpaired electrons of opposite spins

B
A covalent bond is formed by the overlapping of orbitals with unpaired electrons of same spin

C
The greater the extent of overlapping the stronger is the bond.

D
Overlapping takes place only in the direction of maximum electron density of the orbital
Question 7
1 / -0

Which of the following statement is wrong:

A
Hybridisation is the mixing of atomic orbitals prior to their combining into molecular orbitals

B
$$sp^2$$ hybrid orbital are formed from two p atomic orbitals and one s atomic orbital

C
$$dsp^2$$ hybrid orbitals are all at $$90^o$$ to one another

D
$$sp^3d^2$$ hybrid orbitals are directed towards the corners of a regular tetrahedron
Question 8
1 / -0

Find the correct option.

A
$${ NH }_{ 3 }<{ NF }_{ 3 }$$ (Dipole moment)

B
$${ CO }<{ CO }_{ 2 }$$ [C-O bond length]

C
$${ NH }_{ 2 }^{ - }>{ NH }_{ 4 }^{ + }$$ (Bond angle)

D
$${ I }_{ 3 }^{ - }<{ N }_{ 3 }^{ - }$$ [lone pairs]
Question 9
1 / -0

In $${ PO }_{ 4 }^{ 3- }$$ ion, the formal charge on each oxygen atom and $$P-O$$ bond order respectively.

A
$$-0.75, 0.6$$

B
$$-0.5, 1.0$$

C
$$-0.75, 1.25$$

D
$$-3.0, 1.5$$
Question 10
1 / -0

The number of $$\pi $$ electrons in butadiene is

A
2

B
4

C
6

D
8

Solution