Widal test is used for the diagnosis of

Which hormone is responsible for apical dominance?

Let $z = a - \frac{i}{2}$,where $a \in R$. Then $|i + z|^2 - |i - z|^2$ is equal to

Which of the following ions forms the most stable complex compound?

In the compound $M-O-H$,the $M-O$ bond will be broken if

If $R$ is the set of all real numbers and $f: R-\{2\} \rightarrow R$ is defined by $f(x)=\frac{2+x}{2-x}$ for $x \in R-\{2\}$,find the range of $f(x)$.