Scientists working at a hydroelectric plant believe they have discovered a more efficient method of using water to produce electricity. The group that reviews and approves this new method should consist of which group of scientists? 1. Only scientists with backgrounds that are different from the group proposing the new method; they would be more open minded and less influenced by their prior experiences.

2. Only scientists with backgrounds that are similar to the group proposing the new method; they would best understand the process and could promptly approve the new method.

3. Scientists of varied backgrounds; they can question different aspects of the new method, which could lead to greater understanding or the need to re-evaluate the new method.

4. The background of the scientists is not important; science and scientific methods are universally accepted.

po-215 i got it right on the quiz

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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.