EVERYDAY SCIENCE

Detailed explanation-1: -Water molecules have intermolecular hydrogen bonding and make it polar solvent. In case of organic solvents, no such bonds are present, thus solubility of alkane in organic solvents is higher. Thus, the alkanes are insoluble in water but soluble in organic solvents because they cannot break the bonds in water.

Detailed explanation-2: -Why alkenes are insoluble in water? Due to their non-polar properties, alkenes are lighter than water and insoluble in water. Alkenes can only be dissolved in nonpolar solvents.

Detailed explanation-3: -Alkynes are nonpolar, unsaturated hydrocarbons with physical properties similar to alkanes and alkenes. Alkynes dissolve in organic solvents, have slight solubility in polar solvents, and are insoluble in water. Compared to alkanes and alkenes, alkynes have slightly higher boiling points.

Detailed explanation-4: -Because alkane molecules are nonpolar, they are insoluble in water, which is a polar solvent, but are soluble in nonpolar and slightly polar solvents. Consequently, alkanes themselves are commonly used as solvents for organic substances of low polarity, such as fats, oils, and waxes.

Detailed explanation-5: -Because of this linear shape, geometric isomerism does not occur in alkynes. Alkynes are nonpolar, since they contain nothing but carbon and hydrogen, and so, like the alkanes and alkenes, they are not soluble in water, and are generally less dense than water.