The carbon-fluorine bond is one of the strongest covalent bonds, making PTFE resistant to attack by chemicals and heat. The fluorine atoms also shield the carbon backbone.
Explanation:
Faraday's first law of electrolysis: Mass of substance deposited or liberated is proportional to the charge passed (m = ZQ). Z is electrochemical equivalent. Second law relates masses of different substances to equivalent weights for same charge. Ohm's law is V=IR, Graham's law for diffusion. Faraday's laws are quantitative.
Explanation:
Petroleum originates from microscopic marine organisms (plankton) that sank to the seabed and were transformed by heat/pressure over millions of years. Coal is from land plants.
Explanation:
Bakelite is a thermosetting plastic, heat resistant and electrical insulator. Polythene and PVC are thermoplastics; they soften on heating. Teflon is non-stick.
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