Class 11 Chemistry - Chapter Chemical Bonding and Molecular Structure NCERT Solutions | Which out of NH3 and NF3 has higher dipo
Which out of NH3 and NF3 has higher dipole moment and why?
In both molecules i.e., NH3 and NF3, the central atom (N) has a lone pair electron and there are three bond pairs. Hence, both molecules have a pyramidal shape. Since fluorine is more electronegative than hydrogen, it is expected that the net dipole moment of NF3 is greater than NH3. However, the net dipole moment of NH3 (1.46 D) is greater than that of NF3 (0.24 D).
This can be explained on the basis of the directions of the dipole moments of each individual bond in NF3 and NH3.
Since in case of NF3, fluorine is more electronegative than nitrogen, so it will attract the shared pair of electron towards itself from nitrogen. As a result dipole due to all F is in opposite direction to the resultant dipole due to N-F bonds, therefore the net dipole decreases.
In NH3, Nitrogen is more electronegative than H, so it will attract the shared pair of electrons towards itself. As a result dipole due to Nitrogen is in same direction as the resultant dipole moment due to N-H bond and hence the net dipole increases.
Hence, the net dipole moment of NF3 is less than that of NH3.
More Questions From Class 11 Chemistry - Chapter Chemical Bonding and Molecular Structure
- Q:-
What is meant by the term bond order? Calculate the bond order of: N2, O2,O2+,and O2-.
- Q:-
Use molecular orbital theory to explain why the Be2 molecule does not exist.
- Q:-
Explain the formation of H2 molecule on the basis of valence bond theory.
- Q:-
Compare the relative stability of the following species and indicate their magnetic properties:
O2,O2+,O2- (superoxide), O22-(peroxide)
- Q:-
Describe the hybridisation in case of PCl5. Why are the axial bonds longer as compared to equatorial bonds?
- Q:-
Discuss the shape of the following molecules using the VSEPR model:
BeCl2, BCl3, SiCl4, AsF5, H2S, PH3
- Q:-
Explain why BeH2 molecule has a zero dipole moment although the Be–H bonds are polar.
- Q:-
Write Lewis symbols for the following atoms and ions:
S and S2–; Al and Al3+; H and H–
- Q:-
Describe the change in hybridisation (if any) of the Al atom in the following reaction.
- Q:-
Draw the Lewis structures for the following molecules and ions: H2S, SiCl4, BeF2,
, HCOOH
Popular Questions of Class 11 Chemistry
- Q:-
How do you account for the formation of ethane during chlorination of methane?
- Q:-
What are hybridisation states of each carbon atom in the following compounds ?
(i) CH2=C=O,
(ii) CH3CH=CH2,
(iii) (CH3)2CO,
(iv) CH2=CHCN,
(v) C6H6
- Q:-
What will be the minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 30°C?
- Q:-
What are the common physical and chemical features of alkali metals?
- Q:-
Calculate the molecular mass of the following:
(i) H2O
(ii) CO2
(iii) CH4 - Q:-
Assign oxidation number to the underlined elements in each of the following species:
(a) NaH2PO4
(b) NaHSO4
(c) H4P2O7
(d) K2MnO4
(e) CaO2
(f) NaBH4
(g) H2S2O7
(h) KAl(SO4)2.12 H2O
- Q:-
What is the basic theme of organisation in the periodic table?
- Q:-
Choose the correct answer. A thermodynamic state function is a quantity
(i) used to determine heat changes
(ii) whose value is independent of path
(iii) used to determine pressure volume work
(iv) whose value depends on temperature only. - Q:-
A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased.
a) What is the initial effect of the change on vapour pressure?
b) How do rates of evaporation and condensation change initially?
c) What happens when equilibrium is restored finally and what will be the final vapour pressure? - Q:-
Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.
Recently Viewed Questions of Class 11 Chemistry
- Q:-
Chlorine is used to purify drinking water. Excess of chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water.
- Q:-
Explain why cations are smaller and anions larger in radii than their parent atoms?
- Q:-
Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium:
2BrCl (g) ↔ Br2 (g) + Cl2 (g) for which Kc= 32 at 500 K.
If initially pure BrCl is present at a concentration of 3.3 × 10–3 mol L–1, what is its molar concentration in the mixture at equilibrium?
- Q:-
Give the number of electrons in the species
, H2 and 
- Q:-
Calculate a) ΔG0 and b) the equilibrium constant for the formation of NO2 from NO and O2 at 298K
NO (g) + ½ O2 (g) ↔ NO2 (g)
where ΔfG0 (NO2) = 52.0 kJ/mol
ΔfG0 (NO) = 87.0 kJ/mol
ΔfG0 (O2) = 0 kJ/mol
- Q:-
Why does the following reaction occur ?
XeO4– 6(aq) + 2F – (aq) + 6H + (aq) → XeO3(g) + F2(g) + 3H2O(l)
What conclusion about the compound Na4XeO6 (of which XeO4– 6 is a part) can be drawn from the reaction.
- Q:-
Write the formulae for the following compounds:
(a) Mercury(II) chloride
(b) Nickel(II) sulphate
(c) Tin(IV) oxide
(d) Thallium(I) sulphate
(e) Iron(III) sulphate
(f) Chromium(III) oxide - Q:-
Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.
- Q:-
What do you understand by the terms:
(i) hydrogen economy
(ii) hydrogenation
(iii) 'syngas'
(iv) water-gas shift reaction
(v) fuel-cell ?
- Q:-
What do you understand by the term “non-stoichiometric hydrides”? Do you expect this type of the hydrides to be formed by alkali metals? Justify your answer.
2 Comment(s) on this Question
not bad
Yo
- All Chapters Of Class 11 Chemistry
- All Subjects Of Class 11