HKDSE-onward Chemistry Question Review

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Question:

P_2O_5 is a powerful dehydrating agent. Draw the structure of the product when it reacts with HNO_3.

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Solution:

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Question:

Draw the structure of a hydrazine, N_2H_2.

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Solution:

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Question:

Give an IUPAC name for the compound below:

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Solution:

Hydroxylamine.

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Question:

What is the common use of the following compound below?

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Solution:

Nitrous oxide is the most commonly used inhalation anesthetic in dentistry and is commonly used in emergency centers and ambulatory surgery centers as well.

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Question:

Is Nitrogen Monoxide a free redical? Explain briefly.

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Solution:

Yes. There is a unpaired single electron on the Nitrogen atom:

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Question:

Is the following molecule naturally occuring?

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Solution:

Yes, when thunder occurs on the Earth:

N_2 (g)+ 2 O_2 (g) \rightarrow 2NO_2 (g)

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Question:

Give the common name for the compound below.

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Solution:

Nitrous acid

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Question:

Below is the dot diagram for HNO_3:

Draw its Lewis structure.

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Solution:

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Question:

(a) Outline the outer electronic configuration of P.
(b) Outline the mode of orbital hybridization of PCl_5.

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Solution:

(a) 3s^2 3p^3
(b) sp^3d

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Question:

Outline Haber Process.

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Solution: