Tricky questions
4 min read

Hydrogen

- Some questions are often misinterpreted by the students, let's explore them.
1
How well do you remember about the exhausted permutit which means the impurity in water (Ca) that is replaced by Na? Let's solve this question to clarify it's regeneration process.
The substance used for regenerating the exhausted permutit is :
A
B
dil.
C
solution
D
Solution
2
Let us check how well you know the different reactions of sulphur trioxide, attempt this question:
Sulphur trioxide is dissolved in heavy water to form a compound . The state of hybridisation of sulphur in is:
A
B
C
D
3
When it comes to the starting material, reagents or catalysts in preparation reactions, it's easy to make mistakes. Try solving this question:
In the preparation of by auto-oxidation method, the starting substance is:
A
2-ethylanthraquinone.
B
2-ethylanthraquinol.
C
p-benzoquinone.
D
N-methylaniline.
4
Here's a question related to the chemical properties of hydrogen. See if you can find the number of moles based on valency factor.
The number of moles of needed to reduce mole of in acidic medium are:
A
moles
B
moles
C
moles
D
moles