When a mixture of 10.5 g of acetylene (C2H2) and 10.5 g of oxygen (O2) is ignited, the resultant combustion reaction produces CO2 and H2O. How many grams of C2H2 are present after the reaction is complete?

How many grams of O2 are present after the reaction is complete?

How many grams of CO2 are present after the reaction is complete?

How many grams of H2O are present after the reaction is complete?

trigonal pyramidal

tetrahedral

trigonal planar

bent

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.