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Test: Ionic Bond and properties - JEE MCQ


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15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Ionic Bond and properties

Test: Ionic Bond and properties for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: Ionic Bond and properties questions and answers have been prepared according to the JEE exam syllabus.The Test: Ionic Bond and properties MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Ionic Bond and properties below.
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Test: Ionic Bond and properties - Question 1

Which one of the following molecules contain both ionic and covalent bonds?

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k and so 4 has ionic bond and SO4(2) has covalent bonds hence both types of bonds are present.

Test: Ionic Bond and properties - Question 2

In , the formal charge on each oxygen atom and the - bond order respectively are

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Bond order


Three unit negative charge is being shared by four atoms. Formal charge

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Test: Ionic Bond and properties - Question 3

Which of the following is a favourable factor for cation formation?

Detailed Solution for Test: Ionic Bond and properties - Question 3
Low ionisation energy means that electron can be easily lost and cation formation is easier.
Test: Ionic Bond and properties - Question 4

and have the same crystal structure and approximately the same ionic radii. If is the lattice energy of , the approximate lattice energy of is

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Lattice energy
In NaCl the product of charges = 1 × 1; In CaO product of charges = 2 × 2 = 4 while the inter ionic distance is almost same in both. Thus lattice energy of CaO is almost four times the lattice energy of NaCl.

Test: Ionic Bond and properties - Question 5

The compound which contains both ionic and covalent bonds is

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KCN molecule contains both ionic and covalent bonds, as follows


covalent bond

Test: Ionic Bond and properties - Question 6

The electronegativity difference between and is greater than that between and yet the dipole moment of is larger than that of . This is because

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In the atomic dipole (orbital dipole due to lone pair) and bond dipole are in the same direction whereas in these are in opposite direction so in the former case they are added up whereas in the latter case net result is reduction of dipole moment. It has been shown in the following figure :

Test: Ionic Bond and properties - Question 7

The dipole moments of diatomic molecules and are and , respectively while their bond distances are and , respectively. This indicates that

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As dipole moment electric charge bond length
D. M. of AB molecule

D.M. of CD molecule

Now % ionic character
then ionic character in
ionic character in

Test: Ionic Bond and properties - Question 8
If the bond length and dipole moment of a diatomic molecule are and respectively, what is the per cent ionic character of the bond?
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experimental Dipole moment
theoretical Bond length
Per cent ionic character
Test: Ionic Bond and properties - Question 9

The bond length of HCl molecule is 1.275Ã… and its dipole moment is 1.03D. The ionic character of the molecule (in percent) (charge of the electron = 4.8 × 10−10 esu) is

Detailed Solution for Test: Ionic Bond and properties - Question 9

Given,
observed dipole moment = 1.03D
Bond length of HCl molecule, d = 1.275Ã…
= 1.275 × 10−8 cm
Charge of electron, e− = 4.8 × 10−10 esu
Percentage ionic character = ?
Theoretical value of dipole moment = e × d

Percentage ionic character

Test: Ionic Bond and properties - Question 10

What is the % ionic character of HCl if its observed dipole moment is 1.03D, electronic charge (q) is 4.8 × 10−10 e.s.u. and distance (d) between atoms is 1.27Å ?

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Test: Ionic Bond and properties - Question 11
Which of the following statements is correct in the context of the allene molecule, ?
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Test: Ionic Bond and properties - Question 12
Hybridisation of oxygen in diethyl ether is
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In diethyl ether oxygen undergoes hybridisation forming four hybrid orbitals.
Test: Ionic Bond and properties - Question 13
The compound showing maximum covalent character is
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show maximum covalent character due to back bonding.
Test: Ionic Bond and properties - Question 14

Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and the least ionic character, respectively are:

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According to Fajan's rules smaller, highly charged cation has greatest covalent character while large cation with smaller charge has greatest ionic character.

Test: Ionic Bond and properties - Question 15
The dipole moment of is . The dipole moment of is
Detailed Solution for Test: Ionic Bond and properties - Question 15

the dipole moment of trihalobenzene is zero due to symmetry, thus its net dipole moment is same as halo benzene.
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