Q15. The formal charges for C, N and O in the following ion respectively C. =1.-1.-3 B.-3. +3.-1 A. +3. -3, -1 Which of the following molecules has polar bonds but is a nonpolar molecule? C Sea OVE D. 1.0.-1 D. All of them
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.
![Q1. The number of orbitals and the maximum number of electrons in the 5th energy level respectively are?
A. 5 and 10
B. 25 and 50
C. 16 and 32
D. 9 and 18
D. Iron(11) phosphide
D. (4.2.-1.1/2)
D. X(s)-X¹¹(s) le
D. AsCh
Q2. The correct name of Fes(PO4)2 is?
A. Iron(II) phosphate B. Iron phosphate
C. Iron(111) phosphate
Q3. Which of the following combinations of quantum numbers is allowed?
A. (3.0, 3, 1/2)
C. (3.2, -3, -1/2)
C. X g)
Q4. Which of the following
A. X g) X(g) + le
Q5. Which of the following
A. Cla
C. SO₂
B. (3.3.2.-1/2)
represents an ionization energy?
B. X'(g) X³(g) + 2e
1
can have resonance structures?
B. PCIs
Q6. The atoms that cannot exceed the octet is?
A. P
B. B
Q7. Which molecules obeys the octet rule?
A. BH3
B. PCIs
C. S
Q8. How many moles of OH¹ ions are present in 500.0 ml.
A. 0.075
B. 0.50
Q9. The correct order of increasing electronegativities is?
A. Si< Al <S<CI
B. Al < Si<S<CI
Q10. The correct Lewis structure for ozone. O, is?
A. I
B. 11
Q11. The correct order of increasing ionic radius is:
A. N³ <021 < F< Na¹¹ Mg²+
<
C. Mg2+ < Na <N³ <0² <F-¹
X(s) + le
C. SF4
of 0.50 M Al(OH)3
C.0.75
C.S< Cl< Si< Al
D. I
Q 12 Arrange the following in order of increasing first ionization energy.
A. K< Ca< As < Br
B. K<Ca< Br< As
C. Ca<K< Br< As
D. Ca< Br< K< As
Q13. How many electrons in an atom can have the n = 4,1 = 2 designation?
C. 32
B. 8
A. 18
D. CCla
D. 0.25
D. CI <S<Si < Al
C. III
B. Mg2 <Na <F¹ <0²²N³
D. N³ <02 <Mg²+ <F¹ <Na*
D. IV
Q14. Which of the following transitions in the H atom results in the absorption of light?
A. n = 1 to n = 4
B. n = 6 to n = 4
C. n=2 to n = 1
Q15. The formal charges for
A. +3. -3, -1
C, N and O in the following ion respectively
C. =1.-1.-3
B.-3. +3, -1
Q16. Which of the following molecules has polar bonds but is a nonpolar molecule?
B. AsCl3
A. ASCIS
C. SeF4
D. 10
D. n = 6 to n = 2
C-N-O are
D. 1.0.-1
D. All of them](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F88a8e224-89ad-460e-b3b8-fb00e567c197%2Fcca5f728-3c37-4674-91af-78f51f18a6a5%2F71sr8ok_processed.jpeg&w=3840&q=75)
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