What is meant by homologous series of organic compounds Class 10?
What is meant by homologous series of organic compounds Class 10?
> A homologous series is a series of hydrocarbons which have similar chemical properties and they share the same general formula. They are organic compounds having similar structure and functional groups. The constituents of the homologous series shoe a gradation in physical properties.
What is homologous series Short answer?
A homologous series is a series of compounds with the same general formula, usually varying by a single parameter such as the length of a carbon chain. Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties.
What is meant by homologous series in chemistry?
Homologous series, any of numerous groups of chemical compounds in each of which the difference between successive members is a simple structural unit.
What are the types of homologous series?
Examples
| Homologous series | General formula | Repeating unit |
|---|---|---|
| Straight-chain alkanes | CnH2n + 2 (n ≥ 1) | −CH2− |
| Straight-chain perfluoroalkanes | CnF2n + 2 (n ≥ 1) | −CF2− |
| Straight-chain alkyl | CnH2n + 1 (n ≥ 1) | −CH2− |
| Straight-chain 1-alkenes | CnH2n (n ≥ 2) | −CH2− |
Which one is not a member of homologous series?
All are alkenes except 2-butyne. So, 2-butyne does not form the member of homologous series.
Are alkanes a homologous family?
The alkanes are a homologous series of hydrocarbons . This means that they have similar chemical properties to each other and they have trends in physical properties.
What is homologous series and its properties?
In organic chemistry, a homologous series is a series of compounds with the same functional group and similar chemical properties in which the members of the series differ by the number of repeating units they contain. They share common characteristics: They all contain the same functional group.
What are characteristics of homologous series?
Characteristics are :
- The members of the homologous series have same functional group.
- Members have the same general formula.
- Members have the almost same chemical properties due to same functional group.
- Members have common general method of preparation.
What are the four characteristics of homologous series?
Four characteristics of a homologous series are: (i) The general formula of all compounds in the series is the same. (ii) They have the same functional group. (iii) Their physical properties such as melting point, boiling point, density, generally show a gradual change with increase of molecular formula in the series.
What is the importance of homologous series?
1. Homologous series is the characteristic feature of carbon compounds in which carbon and hydrogen atoms in hydrocarbons varying by single parameter. 2. Homologous series helps in determination of structure of the successive member of the series and the property of that members can also be predicted by their series.
What is homologous series explain with example?
A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group. For example, methane, ethane, propane, butane, etc. are all part of the alkane homologous series. The general formula of this series is CnH2n+2.
What is the difference between homologous series and functional group?
The key difference between functional group and homologous series is that functional group is a moiety of a chemical compound that is responsible for the reactivity of that chemical compound whereas homologous series is a sequence of chemical compounds having the similar functional group and similar chemical reactivity …
What is homologous series Class 10 example?
A series of carbon compounds in which same functional group substitutes the hydrogen atom is called a homologous series. For example, the series of alkanes i.e. Methane, ethane, propane, butane and so on is a homologous series.
What is homologous series Class 11?
A homologous series is defined as a family or group of structurally similar organic compounds all the members of which contain the same functional group, Show a gradation in physical and similarity in chemical properties and any two adjacent members of which differ by a -CH2 group.
What are the two types of isomerism?
There are two general types of isomers. Constitutional isomers are molecules of different connectivity—analogous to simple bracelets in which the order of red and green beads is different. The second type is stereoisomers. In stereoisomers the connectivity is the same, but the parts are oriented differently in space.
Which belongs to alkyne series?
C9H16 is Nonyne, is an alkyne as it follows the general formula of Alkynes CnH2n−2.
What are the homologous series of alcohol?
The alcohols are a homologous series of organic compounds . They all contain the functional group –OH, which is responsible for the properties of alcohols. The names of alcohols end with ‘ol’, eg ethanol. The first three alcohols in the homologous series are methanol, ethanol and propanol.
What are the first four homologous series of alcohol?
Thus, the first member of the alcohol homologous series is methyl alcohol, the second is ethyl alcohol, the third member is propyl alcohol and the fourth member is butyl alcohol.
Is ethanol poisonous?
While ethanol is consumed when drinking alcoholic beverages, consuming ethanol alone can cause coma and death. Ethanol may also be a carcinogenic; studies are still being done to determine this. However, ethanol is a toxic chemical and should be treated and handled as such, whether at work or in the home.
Is ethanol toxic to skin?
Topically applied ethanol (e.g. in the form of cosmetics or hand disinfectants) on un-lacerated human skin will not cause acute or systemic toxic effects, which can only occur if applied on damaged skin especially in children.
Is ethanol toxic in hand sanitizer?
Methanol and 1-Propanol Are Toxic There are many types of alcohol. Only ethyl alcohol and isopropyl alcohol (also known as 2-propanol) are acceptable alcohols in hand sanitizer. Other types of alcohol, including methanol and 1-propanol, are not acceptable in hand sanitizer because they can be toxic to humans.
What is the harmful ingredient in hand sanitizer?
The agency is aware of adults and children ingesting hand sanitizer products contaminated with methanol that has led to recent adverse events including blindness, hospitalizations and death. Methanol is not an acceptable ingredient for hand sanitizers and must not be used due to its toxic effects.
What are the 9 hand sanitizer was recalled?
The Good Gel Antibacterial Gel Hand Sanitizer. CleanCare NoGerm Advanced Hand Sanitizer 75% Alcohol. CleanCare NoGerm Advanced Hand Sanitizer 80% Alcohol (lot number 74589-005-03) CleanCare NoGerm Advanced Hand Sanitizer 80% Alcohol (lot number 74589-003-01)