Institution: বঙ্গবন্ধু শেখ মুজিবুর রহমান বিজ্ঞান ও প্রযুক্তি বিশ্ববিদ্যালয় (BSMRSTU) Exam: A ইউনিট || বঙ্গবন্ধু শেখ মুজিবুর রহমান বিজ্ঞান ও প্রযুক্তি বিশ্ববিদ্যালয় || 2011
Topic: Chemistry (রসায়ন), Subject: General Science (সাধারণ বিজ্ঞান)

Best Answer Explained in Below-:

The question pertains to the bond length of the carbon-carbon (C-C) bond in alkenes, which are hydrocarbons characterized by having at least one double bond between carbon atoms. The bond length is a measure of the distance between the nuclei of two bonded atoms.

In alkenes, the C-C bond length is generally influenced by the nature of bonding and the presence of hybridization. Alkenes feature sp² hybridized carbon atoms, which form one double bond (a sigma bond and a pi bond) between them. The double bond leads to a shorter bond length compared to single C-C bonds (such as in alkanes), which feature sp³ hybridized carbon atoms.

For alkenes, the typical C-C bond length is around 1.34 angstroms (Å); however, the values can vary based on the specific alkene structure and surrounding substituents. The bond lengths mentioned in the options likely pertain to different types of carbon bonds (single, double, or possibly resonance structures).

The provided answer, 'D) 1.58 Å', could potentially be confused with values generally associated with carbon chains with more complex bonding, but in reality, the correct carbon-carbon bond length for alkenes usually falls around 1.34 Å. It is important to double-check such values against reliable chemical data sources or textbooks before drawing a conclusion. Therefore, the correct answer should actually be closer to option B (1.34) rather than D (1.58), indicating a possible misstep in the options given.