Electronegativity measures an atom's tendency to attract shared electrons in a chemical bond. Key factors influencing this include:
• Atomic size: Smaller atoms possess higher electronegativity due to the nucleus's closer proximity to bonding electrons.
• Nuclear charge: A greater positive nuclear charge increases the attraction for bonding electrons.
For instance, fluorine is the most electronegative element, attributed to its small size and high nuclear charge.
Consider the following compounds:
(i) CH₃CH₂Br
(ii) CH₃CH₂CH₂Br
(iii) CH₃CH₂CH₂CH₂Br
Arrange the compounds in the increasing order of their boiling points.
Assertion (A): The boiling points of alkyl halides decrease in the order: RI>RBr>RCl>RF.
Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.
Arrange the following compounds in increasing order of their boiling point: \[ \text{(CH}_3\text{)}_2\text{NH, CH}_3\text{CH}_2\text{NH}_2, \text{CH}_3\text{CH}_2\text{OH} \]