If the boiling point of $H_{2}O$ is $373\,K$,the boiling point of $H_{2}S$ will be:

Deuterium resembles hydrogen in properties but:

$B_2H_6 + 2NaH \to$ compound $P$. Identify the hybridisation of Boron in compound $P$.

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Isotopes of hydrogen have almost same chemical properties,but difference in their rates of reaction.
Reason $R:$ Isotopes of hydrogen have different enthalpy of bond dissociation.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following statements concerning protium,deuterium and tritium is not true?

How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes? Explain.