Which cycloalkane has the lowest heat of combustion per CH₂ group?

The oxide that gives H₂O₂ on treatment with dilute acid is 

A hydrocarbon 'A' on ozonolysis gives two isomeric form 'B' and 'C'. B on oxidation gives 'D'. Silver salt of D contains 59.6% Ag. Structure of hydrocarbon is

Which of the following has the minimum boiling point?

The electrophile E⁺ attacks the benzene ring to generate the intermediate σ-complex. Of the following, which σ-complex is of lowest energy?

Trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. This alkane could be

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is

Of the five isomeric bexanes, the isomer which can give two monochlorinated compounds is

Which one of the following processes will produce hard water?