Which of the following statements about metalloids is true? metalloids always readily donate electrons in a chemical reaction. the properties of metalloids are constant regardless of the surrounding environment. metalloids always readily accept electrons in a chemical reaction. the properties of metalloids depend on their surrounding environment.

The properties of metalloids depend on their surrounding environment.

Explanation:

Metalloids have properties between metals and non-metals. Metalloids such as silicon and germanium have 4 valance electrons so they can act chemically either like metals by giving up electrons or like non-metals by accepting electrons. How exactly they will behave chemically depends on the surrounding elements in the chemical reaction.

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

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.