Which group includes microorganisms that lack a defined nucleus but contain genetic material (nucleoid)?

In a fission reaction ${}_{92}^{236}U \to {}^{117}X + {}^{117}Y + n + n,$ the binding energy per nucleon of $X$ and $Y$ is $8.5\, MeV$ whereas that of ${}^{236}U$ is $7.6\, MeV$. The total energy liberated will be about:

$A$: The $O-O$ bond length in $H_2O_2$ is smaller than that in $O_2F_2$.
$R$: $H_2O_2$ is an ionic compound.

Which of the following belongs to secondary air pollutants?

Neurogenic heart is a characteristic of.......

Which one of the following compounds forms a quaternary salt on reacting with excess methyl iodide?