Coordinate or Dative Bonding MCQs

A bond formed by sharing a pair of electrons, where both electrons come from one of the two bonded atoms, is known as a dative or coordinate covalent bond. The atom that provides both electrons is called the donor, while the atom that accepts the electron pair is the acceptor. This bond can be depicted with an arrow pointing from the donor to the acceptor, such as A → B, with a positive charge on the donor and a negative charge on the acceptor. For a dative bond to form, the donor must have at least one lone pair of electrons, and the acceptor must have a vacant orbital. Coordinate covalent compounds are non-electrolytes and do not conduct electricity because they do not ionize in water.

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

Protons play an important role in which type of bonding?

(a) electrovalent
(b) hydrogen
(c) covalent
(d) coordinate

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

Which of the following bonds has the most polar character?

(a) C-O
(b) C-Br
(c) C-S
(d) C-F

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

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

The weakest bond is

(a) hydrogen
(b) van der Waals
(c) covalent
(d) coordinate

A molecule with multiple covalent bonds is

(a) C₂H₄
(b) H₂
(c) F₂
(d) N₂

Which of the following compounds has electrovalent linkage?

(a) CH₃Cl
(b) NaCl
(c) CH₄
(d) Cl₂

The type of bond formed during the hydration of a cation is

(a) ionic
(b) covalent
(c) electrostatic
(d) dative bond