Answer
Verified
37.2k+ views
Hint: All the halogens exist as diatomic molecules in the elemental state. The size of the halogens goes on increasing down a group. With this increase in size, the van der Waals forces of attraction also increase down a group.
Complete step by step answer:
Bromine lies below chlorine in the halogen group. So, bromine has more number of shells than chlorine. As a result, bromine is larger in size and has a larger atomic radius than that of chlorine. Thus, bromine has higher molar mass than chlorine. This difference in size and molar mass relates to the boiling point of the molecule.
With the increase in size of a molecule, the strength of the forces between the molecules or in other words, the intermolecular forces called van der Waals forces increases. Since bromine has larger size than chlorine, it will have stronger intermolecular forces and so more heat energy is required to break the strong bonds. Thus, bromine has a higher boiling point than chlorine. So, the statement 1 is correct.
Dispersion forces or London dispersion forces are temporary forces that result when the electrons in two nearby atoms occupy positions that make the atoms temporary dipoles. These are present between any molecules, whether polar or non-polar when they are almost touching.
Dispersion forces are displayed more strongly by larger and heavier atoms than smaller and light atoms. This is because in a larger atom or molecule, the outermost shell electrons lie more far away from the nucleus than in a smaller atom or molecule. So, they are loosly held and hence can easily form dipoles. Thus, since bromine is larger and heavier than chlorine, bromine will display higher dispersion forces than chlorine. Hence, statement 2 is also correct.
Thus, larger the atom or molecule, stronger will be the dispersion force or van der Waals forces of attraction, which in turn will result in a higher boiling point.
Hence, the correct option is A.
Note: Some other differences between bromine and chlorine are also available. Bromine is less reactive than chlorine. Bromine occurs in nature in the form of two stable isotopes but chlorine only occurs in the form of chemical compounds or remains dissociated in the form of ions. Bromine can exhibit an oxidation state of -1 and any odd positive state of +1, +3, +5 and +7. On the other hand, chlorine exhibits all oxidation states from -1 to +7, except +2.
Complete step by step answer:
Bromine lies below chlorine in the halogen group. So, bromine has more number of shells than chlorine. As a result, bromine is larger in size and has a larger atomic radius than that of chlorine. Thus, bromine has higher molar mass than chlorine. This difference in size and molar mass relates to the boiling point of the molecule.
With the increase in size of a molecule, the strength of the forces between the molecules or in other words, the intermolecular forces called van der Waals forces increases. Since bromine has larger size than chlorine, it will have stronger intermolecular forces and so more heat energy is required to break the strong bonds. Thus, bromine has a higher boiling point than chlorine. So, the statement 1 is correct.
Dispersion forces or London dispersion forces are temporary forces that result when the electrons in two nearby atoms occupy positions that make the atoms temporary dipoles. These are present between any molecules, whether polar or non-polar when they are almost touching.
Dispersion forces are displayed more strongly by larger and heavier atoms than smaller and light atoms. This is because in a larger atom or molecule, the outermost shell electrons lie more far away from the nucleus than in a smaller atom or molecule. So, they are loosly held and hence can easily form dipoles. Thus, since bromine is larger and heavier than chlorine, bromine will display higher dispersion forces than chlorine. Hence, statement 2 is also correct.
Thus, larger the atom or molecule, stronger will be the dispersion force or van der Waals forces of attraction, which in turn will result in a higher boiling point.
Hence, the correct option is A.
Note: Some other differences between bromine and chlorine are also available. Bromine is less reactive than chlorine. Bromine occurs in nature in the form of two stable isotopes but chlorine only occurs in the form of chemical compounds or remains dissociated in the form of ions. Bromine can exhibit an oxidation state of -1 and any odd positive state of +1, +3, +5 and +7. On the other hand, chlorine exhibits all oxidation states from -1 to +7, except +2.
Recently Updated Pages
To get a maximum current in an external resistance class 1 physics JEE_Main
If a wire of resistance R is stretched to double of class 12 physics JEE_Main
Let f be a twice differentiable such that fleft x rightfleft class 11 maths JEE_Main
Find the points of intersection of the tangents at class 11 maths JEE_Main
For the two circles x2+y216 and x2+y22y0 there isare class 11 maths JEE_Main
The path difference between two waves for constructive class 11 physics JEE_MAIN
Other Pages
Differentiate between homogeneous and heterogeneous class 12 chemistry JEE_Main
The mole fraction of the solute in a 1 molal aqueous class 11 chemistry JEE_Main
In the given circuit the current through the 5mH inductor class 12 physics JEE_Main
Explain the construction and working of a GeigerMuller class 12 physics JEE_Main
In a family each daughter has the same number of brothers class 10 maths JEE_Main
Identify which of the above shown graphs represent class 12 physics JEE_Main