Which of the following options containing formula, bonding and nature of aqueous solution respectively is correct for the compound formed by two elements A and B having atomic numbers 1 and 17, respectively?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

Identify the correct electron dot structure of nitrogen molecule in the following:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

Bonds present in

{CuSO}_{4} . 5 H_{2} O

are

EASY

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

What is a polar molecule? Give an example.

HARD

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

Why are covalent compounds are generally poor conductors of electricity?

EASY

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

What do you understand by a lone pair of electrons?

EASY

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

Nitrogen shows maximum covalency of

4

where as other heavier elements of the group show higher covalency because.

EASY

Chemistry>Inorganic Chemistry>Chemical Bond>Covalent Bond

The formation of the oxide ion,

O^{2 -} (g)

, from oxygen atom requires first an exothermic and then an endothermic step as shown in below:

O (g) + e^{-} ⟶ O^{-} (g); Δ_{f} H^{⊖} = - 141 k J m o l^{- 1}

O^{-} (g) + e^{-} ⟶ O^{2 -} (g); Δ_{f} H^{⊖} = + 780 k J m o l^{- 1}

Thus process of formation of

O^{2 -}

in gas phase is unfavourable though

O^{2 -}

is isoelectronic with neon. It is due to the fact that,

Compound X is highly volatile and insoluble in water. Bonding in X is

Important Questions on Chemical Bond

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