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why is a triple bond shorter and stronger than a double and a single bond?

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Please find the solution to the asked query:

A triple bond consists of 1 sigma bond and 2 pi bonds hence is the strongest bond, followed by double bond which has 1 sigma and 1 pi bond,  single bond is the weakest bond as it contains 1 sigma bond.
Sigma bonds are weaker than Pi bonds as their overlap is end to end compared to to lateral overlap of pi bonds.  
Thus a triple bond is very string compared to a single and a double bond.

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Take the example of a long stick. When it is broken into two parts, it becomes much more stronger than the single stick but the size of the stick decreases. The same thing happens to the triple bond. When stick is broken into three parts it becomes stronger and smaller than the single and double bond.
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In a triple bond more electrons are shared , thus due to it the effective charge of nucleus becomes strong as less electron are present in the orbital. This increses the attraction force and makes the bond stronger and shorter.
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