Q. 214.2( 10 Votes )

Fill in the following blanks with suitable words: (a) The form of carbon which is known as black leas is ……………
(b) The form if 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 example 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 ethyne is ……..
(l) The IUPAC name of acetylene is ……

Answer :

(a) graphite

(b) graphite

(c) hydrocarbons

(d) alkene

(e) alkynes

(f) unsaturated

(g) two

(h) low; covalent

(i) catenation

(j) alkenes

(k) ethane

(l) ethyne

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