Test: Chemical Bonding- 1


20 Questions MCQ Test Inorganic Chemistry | Test: Chemical Bonding- 1


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QUESTION: 1

Which among the following formation is not an example of Covalent bond?

Solution:

LiF (Lithium Fluoride) is an example of Ionic bond, as the formation takes place by transfer of electrons and not by sharing.

QUESTION: 2

Which type of bond will be formed by overlapping of dxz and dxz orbitals if the molecular axis is x-axis:

Solution:
QUESTION: 3

Examples of refractory materials include

Solution:
QUESTION: 4

If a bond is made up of a large number of organic compound, then the bond is termed as?

Solution:

This is because they have the tendency to transfer electrons.

QUESTION: 5

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic? 

Solution:

Both Ionic and Covalent bond arise from the tendency of atoms to attain stable configuration of electrons.

QUESTION: 6

Which of the following contains a covalent bond?

Solution:

As we know that ionic bond is formed between an electropositive and an electronegative atom and covalent bond is formed between two electronegative or electropositive elements. In all above options NO3 the bonds are ionic in nature but NO3 is covalent in nature as bond is formed between two electronegative atoms i.e. N and O.

QUESTION: 7

The hybridization state on BiH3 is:

Solution:
QUESTION: 8

The hybridization state in triangular bipyramidal CH5+ is:

Solution:

Carbonium ion methonium,  CH5+ is produced by the addition of  H+ to CH4. In CH5+ three hydrogen atoms are in a plane and one above and one below the plane. 

So its sp3d and the shape is trigonal bipyramid. 

But this compound is considered a CH3+ carbenium ion with a molecule of hydrogen interacting with the empty orbital in a 3-center-2-electron bond. As the two hydrogen atoms in H2 are in continuously exchange positions with the three hydrogen atoms in the CH3+ methonium  CH5+ is considered as a fluxional molecule. Due to the existence of CH3+ this is sp​2 hybridised. 

QUESTION: 9

 Which among the following chemical bond were described by Kossel and Lewis?

Solution:

Both Ionic and Covalent bond arise from the tendency of atoms to attain stable configuration of electrons.

QUESTION: 10

The direction of dipole moment is correct in:

Solution:
QUESTION: 11

If six lobes of one orbital and six lobes of another orbital are overlapped then the resultant bond is:

Solution:
QUESTION: 12

The percentage of p-character in the orbitals forming P−P bonds in P4 is

Solution:
QUESTION: 13

Which has maximum s% in orbital having lp among:

Solution:
QUESTION: 14

The hybridization state in ‘B’ when BF3 form adduct with ether is:

Solution:

Correct Answer :- C

Explanation : BF3 has a boron atom with three outer-shell electrons in its ground state and three fluorine atoms containing seven outer electrons. Further, if we observe closely, one boron electron is unpaired in the ground state. During the formation of this compound, the 2s orbital and two 2p orbitals hybridize. Only one of the empty p-orbital is left behind as the lone pair. In short, Boron needs 3 hybridized orbitals to make bonds with 3 atoms of F where the 2pz orbitals get overlapped with these hybridized sp2 orbitals and bonds are formed.

QUESTION: 15

Which compound species has all the carbons, with same kind of hybridization:

Solution:
QUESTION: 16

The species pair which have same hybridization states among:

Solution:
QUESTION: 17

Which among the following is not a property of Ionic bond?

Solution:

Ionic bond results from a), b) and d). But the transfer of electrons is a property of Covalent bond.

QUESTION: 18

In allene (C3H4), the type(s) of hybridisation of the carbon atoms is (are)

Solution:

An allene is a compound in which one carbon atom has double bonds with each of its two adjacent carbon centres.

The central carbon atom of allene forms two sigma bonds and two pi bonds. The central carbon is sp-hybridized, and the two terminal carbon atoms are sp2-hybridized. The bond angle formed by the three carbon atoms is 180°, indicating linear geometry for the carbon atoms of allene.

QUESTION: 19

In which, lone pair is present in almost pure orbital:

Solution:
QUESTION: 20

With respect to hyper valence theory, which will have multicenter bonding:

Solution:

A hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group elements apparently bearing more than eight electrons in their valence shells.

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