Which amongst the following contains a covalent bond?

M g C l_{2}

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C a F_{2}

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A l_{2} O_{3}

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H C l

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Solution

The correct option is B $H C l$
Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom H and a chlorine atom Cl connected by a covalent single bond. Since the chlorine atom is much more electronegative than the hydrogen atom, the covalent bond between the two atoms is quite polar.

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Which of the following contains a coordinate covalent bond ?

Which of the following contains a coordinate covalent bond? This bond is also called a dative bond.

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