Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : Boron is unable to form BF63-
Reason (R) : Size of B is very small
In the light of the above statements, choose the correct answer from the options given below:
Assertion (A) : Boron is unable to form BF63-
Reason (R) : Size of B is very small
In the light of the above statements, choose the correct answer from the options given below:
- Both (A) and (R) are true and (R)is the correct explanation of(A)
- Both (A) and (R) are true but (R) is not the correct explanation of (A)
- (A) is true but (R) is false
- (A) is false but (R) is true
The Correct Option is B
Solution and Explanation
The correct answer is (B): Both (A) and (R) are true but (R) is not the correct explanation of (A).
The outer most shell of Boron is 2 and its maximum covalency is 4.
Therefore, boron cannot form BF63-.
Hence Assertion is correct.
Boron is the first element of group-13 of modern periodic table. It is very small in size.
But it does not provide correct explanation of Assertion.
Top Questions on p -Block Elements
Given below are two statements.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
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Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. $(\mathrm{B}<\mathrm{Al}),(\mathrm{Al}<\mathrm{Ga}),(\mathrm{Ga}<\mathrm{In})$ and $(\mathrm{In}<\mathrm{Tl})$ Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius $\left(\mathrm{M}^{3+}\right)$ than the other one. The atomic number of the element (X) is
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Statement II: Nitrogen does not form halides with +5 oxidation state due to the absence of d-orbital in it.
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Consider the following reaction:
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Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family