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3142
Which of the following hydrocarbon compounds contains a carbon-carbon double bond?
Ethene (C2H4) is the simplest alkene, characterized by a carbon-carbon double bond. Acetylene contains a triple bond, while ethane and methane are saturated alkanes containing only single bonds between carbon atoms.
3143
How many atoms is each carbon atom bonded to in an ethane molecule?
In ethane (C2H6), each carbon atom is sp3 hybridized. It forms one sigma bond with the other carbon atom and three sigma bonds with three hydrogen atoms, totaling four bonds to four distinct atoms.
3144
In which of the following hydrocarbon molecules is the bond length between two adjacent carbon atoms the longest?
Bond length is inversely proportional to bond order. Ethane contains a single carbon-carbon bond (sp3-sp3 hybridization), which is the longest. Ethene has a double bond (sp2-sp2), and ethyne has a triple bond (sp-sp), both of which are shorter due to increased s-character and electron density between the nuclei. Benzene exhibits intermediate bond lengths due to resonance.
3145
What is the total number of single covalent bonds present in a single molecule of methane (CH4)?
Methane (CH4) consists of one central carbon atom bonded to four hydrogen atoms. Each carbon-hydrogen bond is a single covalent bond formed by the overlap of the carbon's sp3 hybridized orbital with the 1s orbital of a hydrogen atom. Therefore, there are exactly four single bonds in the molecule.
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3147
What characteristic do isomorphic substances exhibit in terms of their physical and chemical properties?
Isomorphic substances are those that have the same chemical composition but differ in their physical properties, such as crystal shape or color, and also exhibit different chemical properties.
Buckyballs, also known as buckminsterfullerene, is a type of carbon molecule that is composed of 60 carbon atoms arranged in a spherical shape. It is an allotrope of carbon, which means it has a different arrangement of atoms than other forms of carbon, such as graphite or diamond.
3149
What is treated with Grignard reagent to form a hydrocarbon?
The Lucas reagent reacts fastest with tertiary alcohols. Among the options, (CH3)3COH is a tertiary alcohol, which reacts rapidly with the Lucas reagent to form a chloroalkane.
