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Carbon and its Compounds

Description: Structure and Bonding
Number of Questions: 15
Created by:
Tags: Structure and Bonding Carbon- Bonding and Structural Properties Carbon Form a Strong Bond
Attempted 0/15 Correct 0 Score 0

Nitrogen molecule is formed by sharing of _________.

  1. 2 electrons

  2. 3 electrons

  3. 4 electrons

  4. 1 electron

  5. 5 electrons


Correct Option: B
Explanation:

Nitrogen has five electrons in its outermost shell. Each atom of nitrogen shares three electrons to form N2 molecule.

Give the structure of C6H6 compound, which represents bond and ring.

  1. It may have 2 double bonds and 5 rings.

  2. It may have 1 double bond and 1 ring.

  3. It may have 3 double bonds and 1 ring.

  4. It may have a single bond and 0 rings.

  5. It may have 2 double bonds and 1 ring.


Correct Option: C
Explanation:

The benzene ring consists of six coplanar carbon atoms bonded by alternating double and single bonds. DoU = 4, where C = 6, N = 0, X = 0, and H = 6. 1 DoB can equal 1 ring or 1 double bond. This corresponds to benzene containing 1 ring and 3 double bonds.

Which of the following options have a zero dipole moment?

  1. CH3Cl

  2. NaCl

  3. H2O

  4. CCl4

  5. NH3


Correct Option: D
Explanation:

The four polar bonds in CCl4 are tetrahedral to each other and cancel each other out.

The compounds which have the same molecular formula but different structures are called as

  1. metamers

  2. isomers

  3. polymers

  4. monomers

  5. tautomers


Correct Option: B
Explanation:

They have same molecular formula but different structures

The bond angle of H3O+ ion is ___________.

  1. 109.5 degrees

  2. 120 degrees

  3. < 109.5 degrees

  4. 104.5 degrees

  5. 180 degrees


Correct Option: A
Explanation:

In H3O+, there are 3 bonding pairs and one 1 pair. The theoretical bond angle for 4 electron domains is "tetrahedral", i.e.109.5.

How many electrons does CONH2 consist?

  1. 23

  2. 22

  3. 25

  4. 27

  5. 28


Correct Option: A
Explanation:

The correct answer is 6 + 8 + 7 + 2 = 23, because there are two hydrogen atoms therefore 1 × 2 = 2.

Which of the following molecules does not contain hydrocarbon atoms?

  1. CH4

  2. C2H6

  3. C20H42

  4. NaNO3

  5. Alkanes


Correct Option: D
Explanation:

Sodium nitrate was one of the first of commercially available inorganic nitrogen (N) fertilizers. Sodium nitrate is the chemical compound with the formula NaNO3.

Which molecular configuration is present in trigonal planar?

  1. BeCl2

  2. SOCl2

  3. SO3-2

  4. SO3

  5. NH3


Correct Option: D
Explanation:

The molecular geometry of SO3 is trigonal planar with symmetric charge distribution on the central atom. Hybridization: sp2

How are positive ions formed from the neutral atom?

  1. Loss of protons

  2. Loss of electrons

  3. Gain of protons

  4. Gain of electrons

  5. Loss of proton and electron


Correct Option: B
Explanation:

Neutral atoms can be turned into positively charged ions by removing one or more electrons.

Saturated hydrocarbons burning in flame, during complete combustion give __________.

  1. sooty flame

  2. blue flame

  3. bluish-green flame

  4. yellow flame

  5. black flame


Correct Option: B
Explanation:

Saturated hydrocarbons generally give a clean blue flame because complete combustion of these substances takes place.

Which of the following is a good electrophile substance?

  1. CH3Cl

  2. H2O

  3. F-

  4. Cl

  5. I-


Correct Option: A
Explanation:

Any atom that has a partial positive charge on it due to being bonded to something that is very electronegative. Ch3Cl is a very good electrophile.

Which of the following compounds is an ester?

  1. CH3COOH

  2. CH3COCH3

  3. CH3COOCH3

  4. CH3CHO

  5. C2H5CHO


Correct Option: C
Explanation:

Methyl ethanoate, i.e. CH3COO (CH3COOH) comes from ethanoic acid and CH3 comes from methanol (CH3OH). Methyl ethanoate is an ester.

Which of the following options is incombustible?

  1. Alcohol

  2. CCl4

  3. Esters

  4. C2H2

  5. H2


Correct Option: B
Explanation:

CCl4 is not flammable, it is known as halon used in fire extinguishers. It is incombustible, i.e. not capable of igniting and burning.

Which C-H bond has the lowest bond dissociation energy?

  1. C2H6

  2. C2H5-H

  3. CH3CH=CH2

  4. C2H2

  5. H3C–H


Correct Option: C
Explanation:

The amount of energy required to break a bond is called bond dissociation.

Which of the following options belong to tertiary alcohol?

  1. CH3-OH

  2. CH3CH2CH2CH2OH

  3. CH3C(CH3)(OH)CH3

  4. CH3CH(OH)CH2CH3

  5. CH3CH1CH1OH


Correct Option: C
Explanation:

In tertiary alcohol, such as CH3C(CH3)(OH)CH3 (2-methylpropan-2-ol), the alcohol functional group is in the 'middle' of the chain, with three alkyl groups attached to the same carbon as the alcohol functional group.

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