Q69 of 312 Page 224

Which of the following compounds can have a double bond?

C4H10; C5H8; C5H10;

The compound having a double bond is called an alkene. The general formula of alkene is CnH2n.

In alkene, the number of hydrogen bond is exactly equal to double the number of carbon atoms. Thus, the compound C5H10 have a double bond.




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67 What is the molecular formula and structural formula of a cyclic hydrocarbon whose one molecule contains 8 hydrogen atoms? 68 Write the molecular formula of: (i) an alkane (ii) an alkene, and (iii) an alkyne, each having 20 carbon atoms? 70 Which of the following hydrocarbons is unsaturated?

C3H4; C2H6;

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