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The P-Block Elements

Question

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Why is H₂O a liquid and H₂S a gas?

Solution

H₂O is a liquid at room temperture because it is highly associated via intermolecular hydrogen bonding. H₂S, due to large size of sulphur cannot form hydrogen bonding. Therefore, H₂S is a discrete molecule and the intermolecular forces of attraction are weak Van der Waal's forces. Hence, H₂,S is a gas at room temperature.

structure of water molecule.

Some More Questions From The p-Block Elements Chapter

Why are pentahalides more covalent than trihalides?

Why is BiH₃ the strongest reducing agent amongst all the hydrides of Group 15 elements?

Why is N₂ less reactive at room temperature?

Mention the conditions required to maximise the yield of ammonia.

What is the covalency of nitrogen in N₂O₅?

Bond angle in PH₄⁺ is higher than that in PH₃. Why?

Write a balanced equation for the hydrolytic reactions PCl₅ in heavy water.

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