Acetic acid is reacted with metallic sodium to form hydrogen and $X$. When $X$ is heated with sodalime,$Y$ and sodium carbonate are formed. $Y$ is

One junction of a certain thermoelectric couple is at a fixed temperature $T_r$ and the other junction is at temperature $T$. The thermo-electromotive force for this is expressed by $E=k(T-T_r)[T_0-\frac{1}{2}(T+T_r)]$. At temperature $T=\frac{1}{2} T_0$,the thermoelectric power is

Which of the following represents the complexity of body organization?

Which part of the tobacco plant is infected by $Meloidogyne$ $incognita$?

Which of the following oxides of nitrogen is a blue solid?

Which one of the following equations represents the Freundlich adsorption isotherm?