Of the following choices, the maximum
a longitude reading with its correct
compass direction is
(1) 90°n
(2)90°e
(3)180°n
(4) 180° e

(4) 180° E

Explanation:

Longitude is an imaginary line drawn on the globe i.e earth running from north to south at right angles to the parallels.

It can be defined as the angular distance measured in degrees east and west of the Greenwich Meridian. All the lines of longitude that runs from north to south are called Lines of Longitude.

The Great Prime or Greenwich Meridian is at longitude of 0°. All other longitudes are called Meridians and are numbered in degrees East and West of longitude 0°.

The maximum longitude reading both east and west of the Greenwich meridian is longitude 180°E and 180°W.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.