Acids taste (although we must never things in the lab). They can be either or corrosive. Alkalis feel to the touch, they can also be .

An example of an acid is . An example of an alkali is

vinegar baking soda soapy sour corrosive irritant

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.