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प्रश्न
Define Unsaturated hydrocarbon.
उत्तर
Unsaturated hydrocarbon: Hydrocarbons in which carbon atoms are linked to each other by double or triple bonds are known as unsaturated hydrocarbons. Examples: Ethene (CH2=CH2) and propyne (CH3-C=CH2) are unsaturated hydrocarbons.
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संबंधित प्रश्न
Give any two differences between alkanes and alkenes.
Write the number of covalent bonds in the molecule of ethane.
Explain in brief two main reasons for carbon forming a large number of compounds.
Draw the electron dot structures for H2S.
Draw the electron dot structures for F2.
Give a test that can be used to differentiate chemically between butter and cooking oil.
A compound 'X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound 'Y'. 'X' also reacts with sodium metal to evolve a colourless gas 'Z'. Identify 'X', 'Y' and 'Z'. Write the equation of the chemical reaction of formation of 'Y' and also write the role of sulphuric acid in the reaction.
Write a short note on Catenation.
Giving their structures, state the number of single bonds, double bonds and triple bonds (if any) in the following compounds:
ethene
Give the names and structural formulae of one saturated cyclic hydrocarbon and one unsaturated cyclic hydrocarbon.
An unsaturated hydrocarbon having a triple covalent bond has 50 hydrogen atoms in its molecule. The number of carbon atoms in its molecule will be:
(a) 24
(b) 25
(c) 26
(d) 28
Which of the following hydrocarbons is unsaturated?
C3H4; C2H6
Name two catalysts which can be used in the hydrogenation of unsaturated compounds.
A mixture of ethyne (acetylene) and oxygen is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
Name the reaction which is usually used in the conversion of vegetables oils to fats. Explain the reaction involved in detail. Write a chemical equation to illustrate your answer.
Explain the following reaction with balanced chemical equation:
Calcium reacts with water.
Which of the following statements are usually correct for carbon compounds? These
- are good conductors of electricity
- are poor conductors of electricity
- have strong forces of attraction between their molecules
- do not have strong forces of attraction between their molecules
Structural formula of ethyne is
The correct electron dot structure of a water molecule is
Name the functional groups present in the following compounds
- CH3 CO CH2 CH2 CH2 CH3
- CH3 CH2 CH2 COOH
- CH3 CH2 CH2 CH2 CHO
- CH3 CH2 OH
