In which of the following sets, all the given species are isostructural?
CO2, NO2, ClO2, SiO2
PCl3, Al Cl3, BCl3, SbCl3
BF3, NF3, PF3, Al F3
BF-4 ,CCl4 ,NH+4 , PCl+4
Isostructural species are the molecules that have the same shape and also the same connectivity. In the question, BF4- ,CCl4 ,NH4+ , PCl4+ are isostructural because they have tetrahedral structure. The atoms occupy one of the vertices of the tetrahedron around the central atom.
From the following, how many compounds contain at least one secondary alcohol? 

Given below are two statements:
Statement I: Dimethyl ether is completely soluble in water. However, diethyl ether is soluble in water to a very small extent.
Statement II: Sodium metal can be used to dry diethyl ether and not ethyl alcohol.
In the light of the given statements, choose the correct answer from the options given below:
What is Microalbuminuria ?
The output (Y) of the given logic implementation is similar to the output of an/a …………. gate.