A sample of oxygen (O2) occupies 452 mL at a pressure of 681 torr and a temperature of 26°C. What pressure will the oxygen exert if: a) the volume is decreased to 419 mL while temperature is held constant?
b) the temperature is decreased to 11°C while the volume is held constant?
c) the temperature is decreased to 11°C and the volume is decreased to 419 mL?

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

answer: they produce more slow than unicellular organisms.

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.