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What is the valency of Carbon in C2H2?
Here, carbon has 4 valency......According to the electronic configurationC-> 1s22s22p2, here there are 2 unpaired elctrons, but the excitation w1hile bonding (exchange energy)results in the replacement of e- (with -1/2 spin) from 2s to 2p (+1/2 spin).this leaves the carbon atom with 4 unpaired elcetrons which gets paired during hybridisation; 1s22s12p3Hence it has 4 valency......
@ mudit in c2h2 carbon forms 1 triple bond , it shares 3 electron here . carbon doesnot gain or loose electron , it only shares the electron . so, valency of carbon will be same for every compound as for ethene , ethyle , and ethane . HOPE IT CLEARS ALL THE BEST ..
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