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1.
Which of the following oxides is not expected to react with sodium hydroxide?
2.
In which molecule, the central atom does not use 
-hybrid orbitals in its bonding?
-hybrid orbitals in its bonding?
3.
Which element has the lowest electronegativity?
4.
Amongst the following elements the configuration having the highest ionization energy is:
5.
Which species does not exist?
6.
Which one of the following has not triangular pyramidal shape?
7.
Among 
and 
the non-linear molecules are:
and the non-linear molecules are:
8.
When the hybridization state of carbon atom changes from to 
and finally to 
the angle between the hybridized orbitals:
to and finally to the angle between the hybridized orbitals:
9.
Which is distilled first?
10.
The equilateral triangle shape has: