Chemical Bonding
The low density of ice compared to water is due to:
The ice floats on water because:
in the solid state (ice), intermolecular interactions lead to a highly ordered but loose structure in which each oxygen atom is surrounded by $$4$$ hydrogen atoms; two of these hydrogen atoms are covalently bonded to the oxygen atom, and the two others (at longer distances) are hydrogen bonded to the oxygen atom’s unshared electron pairs.
this open structure of ice causes its density to be less than that of the liquid state, in which the ordered structure is partially broken down and the water molecules are (on average) closer together. When water freezes, a variety of structures are possible depending on the conditions. $$9$$ different forms of ice are known and can be interchanged by varying external pressure and temperature.
The low density of ice compared to water is due to:
Statement 1 : Conc $$\mathrm{H}_{2}\mathrm{S}\mathrm{O}_{4}$$ is a low volatility and viscos nature acid. Statement2: lt is due to Hydrogen bonding.
Identify the correct statement(s) given below. (a) $$O_2$$ is paramagnetic. (b) $$H_2O$$ is liquid while $$H_2S$$ is gas under given conditions. (c) Boiling point of $$H_2O$$ is abnormally high.
The correct order of boiling point is:
The electronegativities of nitrogen and chlorine are almost same. However, $$NH_3$$ exists as liquid whereas $$HCl$$ as gas due to __________ between the molecules of $$NH_3$$.
Hydrogen bonding plays a central role in the following phenomena :
In solid ice, oxygen atom is surrounded
Hydrogen halide with the highest boiling point is:
Which of the following observations can be explained on the basis of hydrogen bonding? (i) $$H-F$$ has higher boiling point than other halogen acids. (ii) $$H_2O$$ has highest boiling point among hydrides of group 16 elements. (iii) $$NH_3$$ has lower boiling point than $$PH_3$$.
Correct order of B.pt. is/ are: