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 ____.

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

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Updated on: 10-Oct-2022

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