Q9 / 90 · JEE Main 2024 (29 Jan Shift 1) · Chemistry
Given below are two statements :
Statement I : The electronegativity of group elements from to gradually decreases.
Statement II : Group contains non-metallic, metallic, as well as metalloid elements.
In the light of the above statements, choose the most appropriate from the options given below :
Given below are two statements :
Statement I : The electronegativity of group elements from to gradually decreases.
Statement II : Group contains non-metallic, metallic, as well as metalloid elements.
In the light of the above statements, choose the most appropriate from the options given below :
- Correct answerAStatement I is false but Statement II is true
- BStatement I is true but Statement II is false
- CBoth Statement I and Statement II are true
- DBoth Statement I and Statement II are false
Solution
The electronegativity values for elements from to are almost same. So Statement I is false.
- Among them, Carbon and silicon are non-metals.
- Germanium is metalloid in nature
- Tin and lead are metal.
Reason for different metallic characteristics
- The metallic character increases down the group from carbon to lead as nonmetal to metal.
- The metallic character increases because the atomic size increases from Carbon to Lead.
- As size increases, the ionization potential decreases down the group.
- A decrease in ionization potential lead to an increase in the electropositive character of the element.
Hence, the metallic character increases down the group in group as the ionization potential decreases to make it easier to lose an electron and increase the metallic character.
Hence, the correct answer is option: 'A'.