Which one of the following orders is correct for the bond dissociation energies of halogen molecules?

$A$ minimum value of $\int_0^x t e^{t^2} d t$ is

$A$ steel meter scale is to be ruled so that millimeter intervals are accurate within about $5 \times 10^{-5} \ mm$ at a certain temperature. The maximum temperature variation allowable during the ruling is .......... $^oC$ (Coefficient of linear expansion of steel $\alpha = 10 \times 10^{-6} \ K^{-1}$)

From which plant did $D.J. Ivanowsky$ discover viruses?

If the charge on a body is increased by $2 \ C$,the energy stored in it increases by $21 \%$. The original charge on the body in coulomb is

$A$ green light is incident from the water to the air-water interface at the critical angle $(\theta_c)$. Select the correct statement.