Question

True of false:

NH3 has a lower vapor pressure at -50 degrees c then NO.

As the polarity of a covalent compound increases, the solubility of the compound in CCl4 increases.

Li F will have a higher vapor pressure at 25 degrees c than H2S.

Answer 1

• boiling point of NO = -152 ° C , boiling point of NH3 = -33.34 °C

The one with lower boiling point will higher vapor pressure. Here, NO have lower boiling point , so will have higher vapor pressure.

NH3 has a lower vapor pressure at -50 degrees C then NO. - TRUE

• CCl4 is non-polar . According to "like dissolve dissolve" only non-polar covalent bond should dissolve in CCl4 (not polar).

As the polarity of a covalent compound increases, the solubility of the compound in CCl4 increases. - FALSE

• Here, LiF is solid and H2S is gas. It means LiF have higher boiling point and H2S have lower boiling point. It means H2S will have higher vapor pressure.

Li F will have a higher vapor pressure at 25 degrees c than H2S.- FALSE