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A diatomic molecule has a dipole moment of 1.2 D. If its bond length is equal to 10 -10 m then the fraction of an electronic charge on each atom will be:
(D) μ
Which of the following statements is correct?
All the given statements are correct. (CH3)3COH is less acidic than (CH3)3SiOH due to the poorer ability of silicon to stabilize the negative charge on the conjugate base. CO is a stable molecule, but its silicon analogue is not stable. In phosgene (COCl2), the C-O bond length is longer than expected due to the presence of resonance, while the C-Cl bond length is shorter.
The increasing order of the strength of hydrogen bond in the following mentioned linkages
is
(i) O — H — S (ii) O — H — O (iii) F – H – F (iv) F – H – O
(A) Strength of H-bonds on following factors.
(i) Electronegativity of element covalently bonded to hydrogen atom.
(ii) Size of electronegative element.
(iii) Ease of donation of lone pair of electrons by electronegative element.
The boiling pot of is higher than that of because :
(C) Number of polarisable electrons strength of vander waal’s force boiling point.
boiling point .
Assertion : In tetrahedral hybridisation i.e., in hybridisation all p-orbitals are involved and no
p-orbital is left for coming with -bonds.
Reason : Central atom can not form double bonds in the molecules or species having hybridisation.
The assertion is true because in sp3 hybridization, all four orbitals are involved in sigma (σ) bonding, and no p-orbital is left for pi (π) bond formation. However, the reason is false because the central atom can form double bonds in molecules or species with sp2 hybridization, where one p-orbital is available for π-bond formation.
Assertion : is planar at each nitrogen atom.
Reason : the bond angle is and both the bond lengths are not equal.
Assertion : Carbon has unique ability to form multiple bonds with itself and with other
atoms of small size and high electronegativity.
Reason : Heavier elements of group do not form multiple bonds with itself because
their atomic orbitals are too large and diffuse to have effective overlapping.
(B) Both Assertion and Reason are true statements but are different and reason is
not true explanation of assertion. High electronegativity of atoms attached to carbon atom
indirectly results into the contraction of the size of p-orbitals. As carbon atomic size is smaller
and thus it has effective overlapping.
Assertion : and both have same bond order and magnetism
Reason : and are isoelectornic species.
(A) Number of electrons
Number of electrons
Bond order
Both are diamagnetic.
Assertion : Crystals of hydrated calcium sulphate are soft and easily cleaved.
Reason : Crystals of anhydrous calcium sulphate are very hard and very difficult
to cleave.
(B) Within the layers the ions are held together by strong electrovalent bonds. But
these separated layers linked by relative weak H-bond. The weaker H-bonds and
stretched along the layer of water molecules.
Anhydride has a completely ionic structure involving only ions.
When two atoms combine to form a molecule
To attain stability energy is released.
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