Assessment: Force and Motion CBA 3 of 12
Four students recorded the time it took them to walk to school from their homes as shown in the table
below.
22
Student
1
2
Motion of Four Students
Distance (meters) Time (minutes)
1,100
20
1,026
19
848
16
795
15
3
4
Which student had the greatest average speed?
O Student 1
Student 2
Student 3
Student 4
1
2
3
4
5
6
7 8 9 10
Next

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.

the answer is d.) potassium

you need to have a picture of the atom that way we can answer it