A student added sulfur dioxide (SO2) and oxygen gas to a reaction chamber and waited for chemical equilibrium to be established The equation at equilibrium is shown below
250_) 020) - 250 () energy
Which of the following actions would result in additional SO, being formed?
A removing SO2 from the reaction chamber
OBCooling the reaction chamber
ОС
removing from the reaction chamber
OD
decreasing the pressure within the reaction chamber

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

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.