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Fill in the following blanks with suitable words:
(a) The form of carbon which is known as black lead is ____.
(b) The form of carbon which is used as a lubricant at high temperature is ____.
(c) Compounds of carbon with hydrogen alone are called ____.
(d) CnH2n is the general formula of ______ hydrocarbons.
(e) Hydrocarbons having the general formula CnH2n-2 are called _____.
(f) Ethene and ethyne are examples of _____ hydrocarbons.
(g) Ethyne has _____ carbon-hydrogen single bonds.
(h) Carbon compounds have usually _____ melting points and boiling points because they are ____ in nature.
(i) The property of carbon atoms to form long chains in compounds is called ______.
(j) The general formula CnH2n for cycloalkanes is the same as that of ____.
(k) The IUPAC name of ethylene is ____.
(l) The IUPAC name of acetylene is ____.