$A$ coordination complex contains $Co^{3+}$,$Cl^{-}$,and $NH_3$. When dissolved in water,one mole of this complex gives a total of $3$ moles of ions. The complex is

The calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is

Two coins $A$ and $B$ are kept in an urn. When coin $A$ is flipped,the probability of getting a Head is $1/4$,while for coin $B$ it is $3/4$. One coin is randomly chosen from this bag and tossed twice,and it falls heads on both occasions. The probability that it is coin $A$ is:

If the half-life of a reaction is halved when the initial concentration of the reactant is doubled,what is the order of the reaction?

The lines represented by $ax^2 + 2hxy + by^2 = 0$ are perpendicular to each other,if ........

Which of the following is not a type of cancer?