A) \[CS\]
B) \[CO\]
C) \[CF\]
D) \[CBr\]
Correct Answer: A
Solution :
Key Idea: Smaller the difference between the electro negativities of two covalently bonded atoms, greater will be covalent bond's nature. \[\because \]Among given choices the electronegativity difference is least between C and S \[\therefore \]\[CS\]bond is most covalent bond. (The idea about electronegativity of element is obtained from its relative position in periodic table).
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