Er is always Cold weather does not mean climate
change is not happening,
s, and
Which sentence from the article provides the BEST
support for the above statement?
x conditions
mt as they
hat can whip
A
In January 2019, a polar vortex plunged parts
of North America into Arctic conditions.
B
These winds, along with water vapor in the air,
influence the formation and movement of
clouds, rain or snow, and storms.
as in the
С
The cold winter is a relatively small
atmospheric change within a much larger,
long-term trend of warming.
years or
-ugh, on
small
D
More importantly, a change in climate can
lead changes in weather patterns.

the answer is c. nacl

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.