Which equation is balanced?

Mg+O2→2MgO

2Na+F2→2NaF

2Al+3O2→Al2O3

2Al+F2→2AlF3

2Na + F2 → 2NaF

Explanation:

A balanced equation is an equation in which the number of the individual atoms on the left side is the same with that on the right side of the equation. This is true as explained by the law of conservation of matter.

From the options above only the equation given below is balanced :

2Na + F2 → 2NaF

There are 2 atoms of Na both on the left and on the right. There are also 2 atoms of F both on the left and right side

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