$AlCl_3$ is:

The famous botanical garden '$Kew$' is located in

The maximum value of $\left(\frac{1}{x}\right)^{x}$ is

What is $X$ in the following reaction?
$MgCl_2 + 2H_2O \to X + 2HCl + H_2$

Which of the following relations is true?

Three moles of an ideal monoatomic gas undergo a cyclic process as shown in the figure. The temperatures of the gas in different states marked as $1, 2, 3$ and $4$ are $400 \ K, 700 \ K, 2500 \ K$ and $1100 \ K$ respectively. The work done by the gas during the process $1-2-3-4-1$ is (universal gas constant is $R$): (in $R$)