16. which of the following compounds does not obey the octect rule? a) SiCl, b) XeCla c) PH, d) H,S e NO, 17.What is the moiecular geometry (shape) of BrF,? a) T-shaped d) trigonal pyramidal b) tetrahedral e) seesaw or distorted tetrahedral square planar 18. The hybridization of the central atom, P, in PCla is: sp b) sp? c) sp d) sp'd e) sp'd 19. Which of the felowing compounds is polar (has a dipole moment)? a) CF. C) BeF d) XeF. e) BF, 20. According to valence-bond theory, the bonding in ketene, H,CCO, is best described as 6 five a bonds, b) three a bonds and two a bonds.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![11. The ground state electron configuration of 29Cu atom is:
eHAr] 4s' 3de
b) [Ar] 4s' 4d
c) [Kr] 4s' 3dl0
d) [Kr) 4s 3d
e) [Ar] 4s' 3d
12. Which of the following isoelectronic ions has the smallest radius:
a) Ca
b) Mg
c) O
13. Which of the following compounds would be expected to bave the highest melting point?
d) S-
a) NCI,
c) MgCla
d) LICI
e) CCl.
14. Which of these species have two resonance structures?
a) CH,
b) CH;O
e) H2O
d) NO,CI
e) H;S
15. The formal charge on N in the Lewis structure of NO, is:
a) +2
b) +1
d) – 1
-2
16. which of the following compounds does not obey the octect rule?
a) SiCL
b) XeCle
c) PH,
d) H;S
O NO:
17.What is the molecular geometry (shape) of BrF, ?
a) T-shaped
d) trigonal pyramidal
b) tetrahedral
e) seesaw or distorted tetrahedral
square planar
18.
The hybridization of the central atom, P, in PCla is:
O sp
b) sp
c) sp
d) sp'd?
e) sp' d
19.
Which of the felowing compounds is polar (has a dipole moment)?
a) CF.
E) BeF,
d) XeF,
e) BF,
20. According to valence-bond theory, the bonding in ketene, H,CCO, is best described as
6 five a bonds.
c) four o bonds and two n bonds.
e) five a bonds.
b) three o bonds and two a bonds.
d) four o bonds and one x bond.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9ef2a955-c9e2-4072-907d-40ad84e26ad3%2F1d7dbf77-6324-46df-a712-f10c1a139eeb%2Fevvyi1f_processed.jpeg&w=3840&q=75)
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