NEET Chemistry Questions: Basic Principles of Orgainc Chemistry
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As number of C atom in homologus series increases Then which of the following will increases?
No explanation available.
Which of the following exist in gas and liquid State?
No explanation available.
Among the following, which is not an example of a homologous series ?
A homologous series is a group of organic compounds that have a similar general formula, similar chemical properties, and successive members differ by a CH2 unit. Option o4 includes $CH_3COOH$ (acetic acid), $CH_3COOCH_3$ (methyl acetate), and $CH_3COOCH_2CH_3$ (ethyl acetate), which do not fit the criteria of a homologous series because they belong to different functional groups (carboxylic acid and esters).
In homologous series :
In a homologous series, the compounds share a general formula. For example, alkanes have the general formula $C_nH_{2n+2}$, alkenes have $C_nH_{2n}$, and alcohols have $C_nH_{2n+1}OH$. This general formula helps in predicting the molecular formula of the compounds in the series.
Which of the following is the first member of ester homologous series ?
What is not true about homologous series ?
In a homologous series, the physical properties of the compounds, such as boiling and melting points, gradually change with an increase in molecular mass. Thus, they do not have identical physical properties. The similar chemical properties and the ability to be represented by a general formula are true characteristics of a homologous series.
The total possible number of chain isomers for the molecular formula $C_5H_{12}$ would be –
The molecular formula $C_5H_{12}$ corresponds to pentane, which has three chain isomers: n-pentane, isopentane (methylbutane), and neopentane (dimethylpropane).
2-chlorobutane & 3-chlorobutane are
2-chlorobutane and 3-chlorobutane are positional isomers because they differ in the position of the chlorine atom on the carbon chain. In 2-chlorobutane, the chlorine is attached to the second carbon, while in 3-chlorobutane, it is attached to the third carbon.
Which one of the following pairs are called position isomers –
No explanation available.
Which of the following are isomers -
No explanation available.
How many aliphatic carbonyl compounds are possible having the molecular formula $C_5H_{10}O$ –
No explanation available.
The formula $C_4H_8O_2$ represents
No explanation available.
The number of ether metamers represented by the formula $C_4H_{10}O $ is -
The formula $C_4H_{10}O$ can give rise to three ether metamers: 1. Diethyl ether (CH$_3$CH$_2$OCH$_2$CH$_3$), 2. Methyl propyl ether (CH$_3$OCH$_2$CH$_2$CH$_3$), and 3. Ethyl methyl ether (CH$_3$CH$_2$OCH$_3$). These are the three possible structures, hence the correct option is 3.
The phenomenon involving the migration of a proton to give two structural isomers in equilibrium with each other is known is –
Tautomerism is a phenomenon where a proton migrates between two structural isomers that are in equilibrium with each other. A common example is the keto-enol tautomerism, where a proton shifts between the oxygen and carbon atoms.
In keto-enol tautomerism of dicarbonyl compounds, the enol form is preferred in contrast to the keto-form, this is due to
No explanation available.