Elijah wanted to learn more about the growth pattern of bacteria, so he performed the following experiment.

Elijah placed four bacterial colonies in a petri dish filled with nutrient broth. Then, he incubated the dish at 37°C. He planned to make systematic observations by measuring the number of colonies every twenty minutes. The diagram below shows how the dish looked at each twenty minute interval.
Which of the following tables correctly records Elijah's observations?
A.
Total Elapsed Time
(minutes) Number of
Bacterial Colonies
0 4
20 4
40 8
60 16
B.
Total Elapsed Time
(minutes) Number of
Bacterial Colonies
0 4
20 4
20 8
20 16
C.
Total Elapsed Time
(minutes) Number of
Bacterial Colonies
0 4
20 8
20 16
20 32
D.
Total Elapsed Time
(minutes) Number of
Bacterial Colonies
0 4
20 8
40 16
60 32

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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.

12 is it do you think so