Ncert Solutions Chemistry Class 11th

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

The electronic configurations of three elements, A, B and C are given below. Answer the questions 14 to 17 on the basis of these configurations.

A

1S² 2S² 2P⁶

B

1S² 2S² 2P⁶3S² 3P³

C

1S² 2S² 2P⁶3S² 3P⁵

table form of A may be represented by the formula :

(i) A

(ii) A₂

(iii) A₃

(iv) A₄

53 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (i)

The electronic configuration of A 1S² 2S² 2P⁶ is having no unpaired electrons in the outer most shells. So, an atom having no unpaired electron in its valence shell is said to be stable.

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

Which of the following angle corresponds to sp²hybridisation?

(i) 90°

(ii) 120°

(iii) 180°

(iv) 109°

7 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (ii)

For a molecule having a hybridization of sp², its geometry in plane is trigonal planar. For a molecule having a trigonal planar geometry, its bond angle will be 120°

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

If the electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p⁶3d² 4s², the four electrons involved in chemical bond formation will be_____.

(i) 3p⁶

(ii) 3p⁶, 4s²

(iii) 3p⁶, 3d²

(iv) 3d², 4s²

14 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (iv)

The electrons involved in the formation of any chemical bond are the valence shell electrons. In the given electronic configuration,1s² 2s² 2p⁶ 3s²3d² 4s²the valence shell electrons are in d-orbital and s-orbital. S

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

In which of the following substances will hydrogen bond be strongest?

(i) HCl

(ii) H₂O

(iii) HI

(iv) H₂S

11 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (ii)

Hydrogen bond is the strongest in that molecules have a higher difference in electronegativity. Due to the small size of the oxygen atom, it has the highest electronegative character. So, H₂O molecules will have the s

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

In which of the following molecule/ion all the bonds are not equal?

(i) XeF₄

(ii) BF₄^–

(iii) C₂H₄

(iv) SiF₄

59 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (iii)

(i) The molecule XeF₄ has a square planar geometry and the bond lengths of all the fluoride atoms attached to xenon atoms are equal.

(ii) The molecule BF₄ ^- has a tetrahedral geometry and the bond lengths of all the

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

Which molecule/ion out of the following does not contain unpaired electrons?

(i) N₂⁺

(ii) O₂

(iii) O₂^2–

(iv) B₂

31 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (iii)

The molecular orbital diagram of O₂^2-, π^∗2Px and π^∗2Py molecular orbitals are completely filled, which are partially filled in O2. These are no unpaired electrons. So, O₂^2-does n

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

Number of π bonds and σ bonds in the following structure is–

(i) 6, 19

(ii) 4, 20

(iii) 5, 19

(iv) 5, 20

29 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (iii)

A double bond has one s bond and one π bond. In the above given structure 5π bonds are present. The s bonds are the additions of all the single bonds in the structure. There are 19s bonds in the above given structure

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

Which of the following species has tetrahedral geometry?

(i) BH₄^–

(ii) NH₂^–

(iii) CO₃^2–

(iv) H₃O⁺

28 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (i)

(i) The molecule of BH₄ ^- has four bond pairs and zero lone pair of electrons, so it will be a tetrahedral molecule.

(ii) NH₂ ^- has two bond pairs and two lone pairs of electrons on the nitrogen atom. So, it will have

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

In NO₃^–ion, the number of bond pairs and lone pairs of electrons on nitrogen atom are

(i) 2, 2

(ii) 3, 1

(iii) 1, 3

(iv) 4, 0

20 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (iv)

The number of bond pairs on the nitrogen atom of NO₃^- are 4 and the structure of - NO₃ does not have any lone pairs of electrons. The structure of NO₃^-molecule is:

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New answer posted•a year ago

Ncert Solutions Chemistry Class 11th Chemistry NCERT Exemplar Solutions Class 11th Chapter Four

In PO₄^3– ion the formal charge on the oxygen atom of P–O bond is

(i) + 1

(ii) – 1

(iii) – 0.75

(iv) + 0.75

29 Views|Posted a year ago

Asked by Vishal Baghel

Answered by

Vishal Baghel | Contributor-Level 10

a year ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: Option (ii)

In a polyatomic molecule or an ion, the formal charge of an atom is defined as the difference between the valence electrons present in that atom and the number of electrons assigned to that atom in the Lewis structure

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A	1S² 2S² 2P⁶
B	1S² 2S² 2P⁶3S² 3P³
C	1S² 2S² 2P⁶3S² 3P⁵

Ncert Solutions Chemistry Class 11th

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