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Which of the following statement are the...

Which of the following statement are the correct explanation regarding s block elements
I.They are soft metals with high melting and boiling points
II.They have have ionisation enthalpy
IIIThey have low ionisation enthalpy and weak oxidising agents
IV.They are good conductor of electricity and heat

A

I and II

B

II and III

C

III and IV

D

all of the above

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements regarding s-block elements are correct, let's analyze each statement one by one: ### Step 1: Analyze Statement I **Statement I**: "They are soft metals with high melting and boiling points." - **Analysis**: S-block elements, which include alkali metals (Group 1) and alkaline earth metals (Group 2), are generally soft metals. However, they do not have high melting and boiling points; in fact, they have relatively low melting and boiling points compared to other metals. - **Conclusion**: This statement is **false**. ### Step 2: Analyze Statement II **Statement II**: "They have high ionisation enthalpy." - **Analysis**: S-block elements have low ionization enthalpy because they tend to lose their outermost electrons easily. High ionization enthalpy would imply that it is difficult to remove electrons, which is not the case for these metals. - **Conclusion**: This statement is **false**. ### Step 3: Analyze Statement III **Statement III**: "They have low ionisation enthalpy and weak oxidising agents." - **Analysis**: This statement is true. S-block elements have low ionization enthalpy, making them good reducing agents rather than oxidizing agents. They readily lose electrons, which is characteristic of weak oxidizing agents. - **Conclusion**: This statement is **true**. ### Step 4: Analyze Statement IV **Statement IV**: "They are good conductors of electricity and heat." - **Analysis**: S-block elements are indeed good conductors of electricity and heat due to the presence of free-moving electrons in their metallic structure. - **Conclusion**: This statement is **true**. ### Final Conclusion The correct statements regarding s-block elements are: - Statement III: True - Statement IV: True Thus, the correct explanations regarding s-block elements are statements III and IV. ---
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