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Use your understanding of chemistry to propose an explanation for the anomaly in the trend for the hydrogen compounds of group 6a elements shown in the table below?

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Water has greatest boiling and melting points because strong hydrogen bonds between water molecules (intermolecular force). That is because oxygen has largest electronegativity and smallest atomic radius of all elements in group. Other elements in this group do not form hydrogen bonds and they are gasses in room temperature, water is liquid and their boiling and melting points are lower. Boiling and melting point of hydrides gradually increases from H₂S to H₂Te because of increase of the radius and molecular mass of atoms from sulfur to tellurium, that is why intermolecular force of attraction of molecules increases. 

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In the hydrides of group 6a elements, with an increase in the molecular mass, there is a gradual increase in the melting and boiling point.

Water is an exception to having a high boiling point due to the presence of strong intermolecular forces.

In the given compounds, due to an increase in the atomic radius and the molecular mass moving from [tex]\rm H_2S[/tex] to [tex]\rm H_2Te[/tex]., there has been an increase in the boiling and melting point of the compounds.

The increase in the size also results in the increase in the intermolecular force of the compounds, thereby affecting the increase in the melting and boiling points.

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https://brainly.com/question/2153588

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