An acid solution was prepared by dissolving 0.767dm3 of hydrogen chloride gas in water at STP to make 0.25dm3 of solution.18cm3 of this solution were enough to neutralize 25cm3 containing 9.864g of the compound YHCO3 per liter of solution. Determine (i)Concentration of the base in g/dm3
(ii)Atomic mass of Y.
(iii)Write the correct formula of the base.

i don,t know so just answer mine

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.