Fill in the following blanks with suitable words:
(a) The form of carbon which is know 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) `C_(n)H_(2n)` is the general foumula of .................... hydrocarbons.
(e ) Hydrocarbons haveing the general formula `C_(n)H_(2n-2)` are called ...................
(f) Ethyne and ethyne are examples of ....................hydrocatbons.
(g) Ethyne has .................. carbon hydrogen single bonds.
(h) carbon compounds have usually ................. melting p[oints and boiling points beacuse they are.................. in nature.
(i) The prperty of carbon atoms to form along chains in compounds is called...........
(J) The general formaula `C_(n)H_(2n)` for cycloalkanes is the same as that of ................
(k) The IUPAC name of ethylene is ....................
(l) The IUPAC name of acetyleneis ........................

Answer

(a) graphite ,(b) graphite,(c ) hydrocarbons ,(d) alkene, (e ) alkynes , (f) unsaturated , (g) two , (h) low; covalent (i) catenation,(j) alknese , (k)ethene ,(l) ethyne