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प्रश्न
The first member of alkyne homologous series is
पर्याय
ethyne
ethene
propyne
methane
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उत्तर
ethyne
Explanation -
The general formula for an alkyne is CnH2n-2. So, the first member of this series is C2H2 (ethyne).
APPEARS IN
संबंधित प्रश्न
Write the next homologue of the following: C4H6
What is meant by homologous series of carbon compounds?
Write the name and formula of the 2nd member of homologous series having general formula CnH2n.
Give the structural formula for 1, 2-dichloroethane
Fill in the following blank with suitable word:
Ethene and ethyne are examples of ..... hydrocarbons.
An organic compound having the molecular formula C3H6O can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquid which is used as a solvent for nail polish. The isomer B is also a liquid. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory
(a) What is compound A?
(b) Write the electron-dot structure of A.
(c) What is compound B?
(d) Write the electron-dot structure of B.
(e) Name the lower homologue of compound B which is used in preserving biological specimens.
Give the dot diagram of the first member of the alcohol.
Give the abbreviated formula of the third member of the alcohol.
What is the difference in the molecular formula of any two adjacent homologues in terms of molecular mass?
Write names of first four homologous series of alcohols.
Copy and complete the following table, which relates to the three homologous series of hydrocarbons:
| General formula | CnH2n | CnH2n-2 | CnH2n+2 |
| IUPAC name of the homologus series | |||
| Characteristic bond type | Single bonds | ||
| IUPAC name of the first member of the series | |||
| Type of reaction with chlorine | Addition |
Haloalkanes react with alkalies to produce alcohol. Give the equation for the preparation of the second member of the homologous series of alcohol. State under what condition the reaction occurs.
The general molecular formula for the homologous series of alkynes is _______.
Find the odd one out and give its explanation.
There are different general molecular formula for all members of the homologous series.
C3H8 belongs to the homologous series of ______.
A carbon compound ‘A’ having melting point 156K and boiling point 351K, with molecular formula C2H6O is soluble in water in all proportions.
- Identify ‘A’ and draw its electron dot structure.
- Give the molecular formulae of any two homologues of ‘A’.
Write the chemical formula of two consecutive homologous of organic compounds having functional group - OH.
What happens to the (i) boiling point and (ii) solubility of organic compounds of a homologous series as the molecular mass increases?
Consider the following molecular formulae of carbon compounds:
(i) CH3COOH (ii) CH3OH (iii) C2H6 (iv) C3H4 (v) C4H8
- Which one of these compounds belongs to homologous series of alcohols?
- Identify the compound having triple bond between carbon-carbon atoms.
- Write the molecular formula of the first member of the homologous series to which CH3COOH belongs.
- Write the general formula of the series to which the compound C4H8 belongs.
Name and draw the electron dot structure of first homologue of alkynes series.
