The decomposition of $H_2O_2$ can be prevented by the addition of which of the following?

Which of the following compounds exhibits linkage isomerism?

Which of the following mineral elements is responsible for the permeability of the cell membrane?

In a mutational event,when adenine is replaced by guanine,it is the case of

Let $p, q, r$ be three statements such that the truth value of $(p \wedge q) \rightarrow (\sim q \vee r)$ is $F$. Then the truth values of $p, q, r$ are respectively

If $3x^2-11xy+10y^2-7x+13y+k=0$ denotes a pair of straight lines,then the point of intersection of the lines is