Why `He_2` molecule is not stable ?

Use molecular orbital theory to explain why the Be_2 molecule does not exist.

Why is DNA molecule more stable genetic meterial than RNA? OR DNA is more stable than RNA. Justify/Give reason.

Although both CO_2 and H_2O are triatomic molecules, the shape of H_2O molecules is bent while that of CO_2 is linear. Explain this on the basis of dipole moment.

Ne_2 molecule has bond order

Explain why BeH_2 molecule has a zero dipole moment although the Be-H bonds are polar.

At what temperature will the R.M.S. velocity for H_2 molecule-be same as that for O_2 molecule at 127° C?

During DNA replication, why is it that the entire molecule does not open in one go? Explain replication,fork. What are the two functions that the monomers (dNTPs) play?

Show that rms velocity of an oxygen molecule is sqrt2 times that of a sulphur dioxide molecule at S.T.P.

The bond angle in H_(2)O molecule is less than that of NH_(3) molecule because__________.

The shape of SO_2 molecule is