Question

How does dihydrogen react with (i) halogens (ii) nitrogen (iii) sulphur (iv) carbon (v) sodium

Answer 1

Hello Dear.

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(i) When Di Hydrogen reacts with the Halogens, it forms Acids. Reactions of the formation of the Acids by the action of Hydrogen on  Halogens are given below →

For Example ⇒

H₂ + Cl₂ ----→ 2HCl. (Hydrogen Chloride)
H₂ + Br₂ ------→2HBr. (Hydrogen Bromide)
H₂ + F₂ ------→ 2HF   (Hydrogen Fluoride)
H₂ + I₂ ------→  2HI    (Hydrogen Iodide)

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(ii). Reaction of the Di - Hydrogen with the Nitrogen.

Generally, Hydrogen Does not combines with the Nitrogen under common conditions.
Under the Presence of the Catalyst ''Finely Divided Iron'' and promoter ''Aluminum Hydroxide'' at the temperature of 450 - 500 °C and the Pressure of 200 - 900 ATM, Reaction usually occurs.

       N₂ + 3H₂ -------→ NH₃.


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(iii). Reaction of the Hydrogen with the Sulphur.
When Hydrogen Reacts with the Sulphur, it forms the Hydrogen Sulphides.

    H₂ + S ------→ H₂S  (Hydrogen Sulphide)

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(iv). Reaction of the Hydrogen with Carbon.

At common Temperatures and common conditions, Hydrogen does not reacts with the Carbon. However as the temperature varies the reaction also varies.
At the temperature of 800 K., the reaction is →
       C +  2H₂  ------→ CH₄↑

When the temperature roses to the 2500 K.
   2C + 2H₂  ----------C₂H₄.


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(v) Generally Di Hydrogen Does not reacts with the Sodium or any metals. However, if the reaction is occurring under certain conditions, then the Hydrides of the Metals are Formed which are unstable.

Reaction is → 
2Na + H₂  -------→ 2NaH


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Hope it helps.