Formaldehyde (ch2o) has a much higher boiling point ( - 19.5o c) than ethane (c2h6) ( - 88oc).
which of the following statements are true, based on this information and the structures of these compounds?
(a) formaldehyde has dipole forces and ethane does not.
(b) formaldehyde has dispersion forces and ethane does not.
(c) both would be liquids at room temperature.
(d) formaldehyde has stronger intermolecular forces than ethane.

D

Explanation:

Formaldehyde is an organic compound having a carbonyl group with two hydrogen groups. In general, any compound having oxygen and hydrogen in same molecule has higher and stronger intermolecular forces than any other who doesn't have. Formaldehyde exhibits this particular property, as oxygen being the electronegative atom attracts hydrogen of the other formaldehyde molecule which results in having a much higher boiling point as compared to Ethane which doesn't has the same functionality.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-