What is formed when oxalic acid is dehydrated with concentrated $H_2SO_4$?

Where is the National Botanical Research Institute $(NBRI)$ located?

$A$ force acts on a $3\, g$ particle in such a way that the position of the particle as a function of time is given by $x = 3t - 4t^2 + t^3$,where $x$ is in $meters$ and $t$ is in $seconds$. The work done during the first $4\, seconds$ is .............. $mJ$.

What is the respective number of $\alpha$ and $\beta$ particles emitted in the following radioactive decay: ${}_{90}^{200}X \to {}_{80}^{168}Y$?

In the reaction sequence,$C_2H_5Cl + KCN$ $\xrightarrow{C_2H_5OH} X$ $\xrightarrow[\Delta]{H_3O^+} Y$. What is the molecular formula of $Y$?

During the electrolysis of copper sulphate aqueous solution using copper electrodes,the reaction taking place at the cathode is: