Difficult Questions
5 min read

Some P-Block Elements

- Are you well prepared? Practice hard questions to get more confident about the chapter.
1
In this chapter you will find many questions related to structure of boron halides. Here's one question try solving this.
Which one of the following statements is incorrect about the structural properties of ?
A
The unsual shortness of bonds is due to interaction between and atoms
B
All the three bond lengths are equal
C
Double bond is delocalized giving three resonance structures.
D
Due to back bonding, and are not isostructural molecules
2
Let's try to solve questions based on oxidation state.
The stability of +1 oxidation state increases in the sequence:
A
B
C
D
3
I am sure that you are well aware of Lewis acid and base concept. Let's try to solve the below question.
Apomictic embryos in citrus arise from :
A
Synergids
B
Maternal sporophytic tissue in ovule
C
Antipodal cells
D
Diploid egg
4
Let's see how thoroughly you have studied the anomalous properties of Boron.
The only element of group 13 which does not form a passive layer on the surface while dissolving in con. , but dissolve to form complex is:
A
boron
B
aluminium
C
both
D
none
5
Finding missing reactants, products can be tricky. Let's try to find out in this question.
Consider the following reactions:


In the above reaction sequence, and are:
A
B
C
D