Chemical Bonding MCQs for CSIR NET & GATE Chemistry | Download PDF

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Chemical Bonding | Assignment 6

         

Q1. Which of the following species are hypervalent?
(A) ClO₄^-
(B) BF₃
(C) SO₄^2-
(D) CO₃^2-
    a) A, B, C
    b) A, C
    c) C, D
    d) A, B

Q2. Which of the following polyhedron has same no. of faces?
A. Trigonal bipyramidal
B. Trigonal prism
C. Pentagonal pyramidal
D. Cube
    a) A and B
    b) A and C only
    c) A, B, C
    d) A, C, D

Q3. If C-C bond in C₂H₆ undergoes heterolytic fission, the hybridization of two resulting carbon atoms is/are
    a) sp² both
    b) sp³ both
    c) sp3, sp²
    d) sp, sp³

Q4. Which of the following pairs is isostructural
    a) SF₄ and SiF₄
    b) SF₆ and SiF₆^2-
    c) SiF₆^2- and SeF₆^2-
    d) XeO₆^4- and TeF₆

Q5. Arrange the following in order of decreasing N-O bond length

NO₂⁺, NO₂^-, NO₃^-

a) NO₃^- > NO₂^- > NO₂⁺
b) NO₃- > NO₂^- > NO₂+
c) NO₂⁺ > NO₃^- > NO₂^-
d) NO₂^- > NO₃^- > NO₂⁺

Q6. Math the following molecules with their corresponding bond angles

A. NH3	P. 120o
B. N(CH3)3	Q. 110.9o
C. N(SiH3)3	R. 106.6o
D. N(GeH3)3

a) (A-R) (B-Q), (C-P), (D-Q)
b) (A-R) (B-P) (C-Q) (D-P)
c) (A-R), (B-Q), (C-P), (D-P)
d) (A-R) (B-P), (C-P), (D-Q)

Q7. Hybridization of carbon in C₃O₂ is
a) sp
b) sp²
c) sp³
d) sp³d

Q8. In case of PF₅, the ground state TBP structure converts into transition state and back to a new TBP structure. The hybridization of central atom phosphorous in the transition state is
a) sp³ d_z²
b) sp3 d_x²-y²
c) sp³
d) sp³ d_x²-y² d_z²

Q9. If bond order of CO molecule is 3, then what will be the bond orders of CO⁺ and CO^- respectively
a) 3.5, 3.5
b) 3.5, 2.5
c) 2.5, 3.5
d) 2.5, 2.5

Q10. The bond angle of Cl₂O is
a) smaller than that of F₂O
b) greater than that of H2O
c) smaller than that of H₂O
d) same as that of F₂O

Q11. The hybridization of ‘C’ in ^oCH₃ and ^oCF3 respectively are
a) sp³, sp³
b) sp², sp²
c) sp³, sp²
d) sp², sp³

Q12. Which of the following doesn’t show fluxional behavior?
a) SF₄
b) BrF₅
c) PF₃ Cl₂
d) PF₂(CH₃)₃

Q13. Which of the following triplets is not correct?

Ion	X-O pm	O-X-O angle
A. ClO3-	P. 165	L. 107o
B. BrO3-	Q. 181	M. 100o
C. IO3-	R. 149	N. 104o

a) A-Q-M
b) B-P-N
c) C-Q-M
d) A-R-L

Q14. Which is having different shape among the following?
a) BrF₅
b) TeF₅^-
c) XeF₅^-
d) XeF₅⁺

Q15. The hybridization of atomic orbital of Nitrogen in NO₂+, NO₃^- and NH₄⁺ are
a) sp, sp², sp³
b) sp², sp³, sp
c) sp², sp, sp³
d) sp, sp³, sp²

Q16. Total number of sigma and pi bonds in below molecule are
a) 11, 11
b) 19, 11
c) 11, 19
d) 8, 8

Q17. Which of the following contains maximum number of lone pairs on the central atom?
a) ClO₃^-
b) XeF₄
c) SF₄
d) I₃^-

Q18. Which of the following is the highest occupied molecular orbital in HF?
a) σ
b) σ*
c) 2p_x 2p_y
d) Not defined

Q19. Which of the following is not correct?
a) Methanol has much higher boiling point than methyl mercaptan, CH₃SH.
b) Carbon monoxide has slightly higher melting and boiling points than N₂.
c) The boiling points of noble gases increase with atomic number.
d) Extent of polymerization increases in the order: ClO₄->SO₄3->PO₄3->SiO₄^4-

Q20. No. of 3c-2e bonds in [Al (BH₄)3]^- and Al₂B₄H₁₈ respectively are:
a) 10, 6
b) 6, 8
c) 6, 10
d) 8, 6

Answers

1.b 2.d 3.c 4.b 5.b 6.c 7.a 8.b 9.b 10.b 11.d 12.d 13.a 14.c 15.a 16.b 17.d 18.a 19.d 20.c