Chemical Bonding and Molecular Structure Test 21

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Chemical Bonding and Molecular Structure Test 21

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Weekly Quiz Competition

Question 1
1 / -0

What type of carbon-carbon bonds are present in vanaspati ghee?

A
single bonds

B
double bonds

C
triple bonds

D
none of these

Solution

Saturated Alkane Hydrocarbon is the carbon-carbon bond seen in Vanaspati ghee.
A process called 'Hydrogenation' is carried out in converting unsaturated alkene hydrocarbon into saturated alkane hydrocarbon.
Vegetable oils are converted into vanaspati ghee by hydrogenation (treating with hydrogen). Here, unsaturated carbon-carbon double bonds are converted into saturated fatty vanaspati ghee.
Question 2
1 / -0

How many bonds are there in

A
$$14\sigma,\ 8\pi $$

B
$$18\sigma,\ 8\pi $$

C
$$19\sigma,\ 4\pi $$

D
$$14\sigma,\ 2\pi $$

Solution

Here there are $$4$$ $$C=C$$ bond. So the number of pi bond is $$4$$.

Alos, there are $$10$$ $$C-H$$ sigma bond and $$9$$ $$C-C$$ sigma bond. So in total, there are $$19$$ sigma bonds.

Hence correct answer is option C.
Question 3
1 / -0

Among $$ KO_2, KAlO_2, CaO_2, CaO_2 and NO_2^+ $$ unpaired electron is present in :

A
$$ NO_2^+ , CaO_2 $$

B
$$ KO_2 and KAlO_2 $$

C
$$ KO_2 only $$

D
$$ CaO_2 only $$

Solution
Question 4
1 / -0

Which of the following has zero dipole moment?

A
CO

B
$$S{O_2}$$

C
$$S{O_3}$$

D
$${H_2}O$$

Solution
Question 5
1 / -0

Choose the correct option for the following molecule in view of chemical bonding:

A
Non-planar

B
$$\mu \ne 0$$

C
A & B both

D
$$\mu = 0$$
Question 6
1 / -0

Which of the following hydrocarbons has the lowest dipole moment?

A
cis-2-butene

B
2-butyne

C
I=butyne

D
$$H_2C=CH-C\equiv CH$$

Solution

2 butyne is symmetrical with linear structure and therefore , will have zero dipole moment
Question 7
1 / -0

In a polar molecule, the ionic charge is $$4.8\times 10^{-10}$$ e.s.u. If the inter ionic distance is one $$\overset {\circ}{A}$$ unit, then the dipole moment is

A
$$41.8\ debye$$

B
$$4.18\ debye$$

C
$$4.8\ debye$$

D
$$0.48\ debye$$

Solution
Question 8
1 / -0

What is the proportion of sigma $$(\sigma)$$, and pi $$(\pi)$$ bond in $$1, 4- Benzoquinone$$?

A
$$1 : 3$$

B
$$3 :2$$

C
$$2 : 1$$

D
$$2 : 3$$

Solution
Question 9
1 / -0

The molecule with the highest dipole moment is

A
$$CH_{2}Cl_{2}$$

B
$$CH_{3}Cl$$

C
$$CHCl_{3}$$

D
$$CCl_{4}$$

Solution

CHCl3 is having the maximum dipole moment because in the tetrahedral structure all the Cl will be at the bottom and will lead to the addition of their individual dipoles.

Whereas in CCl4 a little dipole is reduced due to the subtraction of the individual dipole of a Cl present at the top.

CH2Cl2 and CH3Cl will have a small resultant dipole because of less number of individual dipoles to add.
Question 10
1 / -0

Which of the following compounds has a zero dipole moment?

A

B

C

D

Solution

1,2,3 trichloro cyclo propane has 0 dipole moment.
Option C is correct answer