MCQs on Coordinate or Dative Bonding
1. When two species A and B form an electron-pair bond and A does not provide its electrons for bonding, the bond present between A and B must be
(a) ionic
(b) covalent
(c) dative
(d) Hydrogen
Answer:::: (c)
2. Each of the following pairs of chemical species will combine. Which of the following combinations is best explained by the coordinate covalent bond?
(a) H2 + I2
(b) Mg +O2
(c) Cl + Cl
(d) H+ + H2O
Answer:::: (d)
3. BF3 forms an adduct with NH3 because
(a) nitrogen has a high electronegativity
(b) boron has a high electronegativity
(c) boron has an empty p-orbital and nitrogen has one lone pair of electrons
(d) boron has an electropositive character
Answer:::: (c)
4. Protons play an important role in which type of bonding?
(a) electrovalent
(b) hydrogen
(c) covalent
(d) coordinate
Answer:::: (d)
5. Which of the following compounds contain all three types: ionic, covalent and dative bonds?
(a) CuSO4.5H2O
(b) Solid N2O5
(c) (NH4)2SO4
(d) All
Answer:::: (d)
6. The type of bond formed during the hydration of cation is
(a) ionic
(b) covalent
(c) electrostatic
(d) dative bond
Answer:::: (d)
7. Which of the following compounds has electrovalent linkage?
(a) CH3Cl
(b) NaCl
(c) CH4
(d) Cl2
Answer:::: (b)
8. Which of the following bonds has the most polar character?
(a) C-O
(b) C-Br
(c) C-S
(d) C-F
Answer:::: (d)
9. A molecule with multiple covalent bonds is
(a) C2H4
(b) H2
(c) F2
(d) N2
Answer:::: (d)
10. The weakest bond is
(a) Hydrogen
(b) Van der Waals
(c) Covalent
(d) Coordinate
Answer:::: (b)
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