Hydrogen accepts an electron to achieve the inert gas configuration. In this process,it behaves like which of the following?

The hydride ion $H^{-}$ is isoelectronic with which of the following?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Heavy water is used for the study of reaction mechanism.
Reason $(R):$ The rate of reaction for the cleavage of $O-H$ bond is slower than that of $O-D$ bond.
Choose the most appropriate answer from the options given below:

Which of the following statements is correct?

What is Carbogen?

The charring of sugar takes place when treated with concentrated $H_2SO_4$. What is the type of reaction involved in it?