1.
An isomer is a molecule with the same?
Correct Answer
A. Molecular formula
Explanation
Isomers are molecules that have the same molecular formula but different structural arrangements. This means that they have the same number and types of atoms but are arranged differently in space. Isomers can have different physical and chemical properties due to their different structures, which can affect their reactivity, boiling points, melting points, and other properties. Therefore, the correct answer is "Molecular formula".
2.
Isomers contain the same number of atoms of?
Correct Answer
A. Each element
Explanation
Isomers are molecules that have the same molecular formula but different structural arrangements. This means that they contain the same number of atoms of each element. Therefore, the correct answer is "Each element".
3.
There are two main forms of isomerism, which are?
Correct Answer
A. Structural isomerism and stereoisomerism
Explanation
The correct answer is Structural isomerism and stereoisomerism. Isomerism refers to the phenomenon where compounds have the same molecular formula but different structural arrangements or spatial orientations. Structural isomerism occurs when compounds have the same molecular formula but different connectivity of atoms. Stereoisomerism, on the other hand, occurs when compounds have the same molecular formula and connectivity of atoms, but differ in their spatial arrangement. Therefore, the two main forms of isomerism are structural isomerism and stereoisomerism.
4.
What is another name for structural isomers?
Correct Answer
A. Constitutional isomers
Explanation
Structural isomers are compounds that have the same molecular formula but differ in the arrangement of atoms within the molecule. They have different connectivity of atoms and thus different chemical properties. The term "constitutional isomers" is commonly used to describe structural isomers. Therefore, the correct answer is "Constitutional isomers".
5.
Structural isomers have different IUPAC names and may or may not belong to the same?
Correct Answer
B. Functional group
Explanation
Structural isomers have the same molecular formula but different structural arrangements. They can have different functional groups, which are specific groups of atoms that determine the chemical behavior of a compound. Therefore, the statement that "Structural isomers have different IUPAC names and may or may not belong to the same functional group" is correct.
6.
In chain isomerism, hydrocarbon chains have variable amounts of?
Correct Answer
D. Branching
Explanation
In chain isomerism, hydrocarbon chains can have different amounts of branching. This means that the carbon atoms in the chain can be arranged in a straight line or they can have branches or side chains attached to them. The presence or absence of branching affects the physical and chemical properties of the hydrocarbon, making it an important factor to consider in organic chemistry.
7.
Position isomerism deals with the position of a functional group on a?
Correct Answer
D. Chain
Explanation
Position isomerism refers to the arrangement of functional groups on a carbon chain. In this type of isomerism, the functional group is located at different positions along the carbon chain, resulting in different chemical properties. Therefore, the correct answer is "Chain."
8.
In functional group isomerism, one functional group is split up into different?
Correct Answer
C. Ones
Explanation
In functional group isomerism, one functional group is split up into different "ones". This means that the original functional group is divided or rearranged to form multiple different functional groups. This phenomenon occurs when the atoms within the functional group are rearranged or connected in a different way, resulting in different chemical properties and reactivity. Therefore, the correct answer is "Ones".
9.
A two position isomer would be 2-fluoropropane and?
Correct Answer
A. 1-fluoropropane
Explanation
An isomer is a compound with the same molecular formula but different structural arrangements. For fluoropropane, the fluorine atom can be attached to different positions on the propane chain. The two position isomers for fluoropropane are 2-fluoropropane and 1-fluoropropane. There is no 3-fluoropropane, 4-fluoropropane, or 0-fluoropropane because in a three-carbon chain like propane, fluorine can only be attached to the first or second carbon to create different isomers.
10.
In skeletal isomers, the main carbon chain is different between the two?
Correct Answer
D. Isomers
Explanation
Skeletal isomers are a type of isomer where the main carbon chain differs between the two molecules. This means that the arrangement of carbon atoms in the backbone of the molecules is different, resulting in different chemical properties and structural characteristics. Isomers, in general, are compounds that have the same molecular formula but different structural arrangements, and skeleton isomers specifically refer to isomers with differing main carbon chains.