$A$ man is admitted to a hospital. He is suffering from an abnormally low body temperature,loss of appetite,and extreme thirst. His brain scan would probably show a tumour in

If the charge on the capacitor is increased by $2 \ C$,the energy stored in it increases by $21 \%$. The total original charge on the capacitor is: (in $C$)

The ratio between kinetic energy and the total energy of the electrons of a hydrogen atom according to Bohr's model is

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is

$A$ series combination of resistor $(R)$ and capacitor $(C)$ is connected to an $A$.$C$. source of angular frequency $\omega$. Keeping the voltage same,if the frequency is changed to $\omega / 3$,the current becomes half of the original current. Then the ratio of the capacitive reactance and resistance at the former frequency is

In which plant group is the gametophytic phase reduced,haploid,short-lived,and subterranean?