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(C) by How Many Carbon Atoms and Hydrogen Atoms Do Any Two Adjacent Homologues Differ? - Science

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प्रश्न

By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?

 
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उत्तर

Any two adjacent homologues differ by 1 carbon atom and 2 hydrogen atoms in their molecular formulae.

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अध्याय 4: Carbon And Its Compounds - Exercise 2 [पृष्ठ २४०]

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लखमीर सिंग Chemistry (Science) [English] Class 10
अध्याय 4 Carbon And Its Compounds
Exercise 2 | Q 28.3 | पृष्ठ २४०

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

Write the molecular formula of the 2nd and 3rd member of the homologous series where the first member is ethyne.


Complete the following table which relates to the homologous series of hydrocarbons.

General

Formula

IUPAC name of the homologous series Characteristic bond type IUPAC name of the first member of the series
`C_nH_(2n-2)` (A)________ (B)______ (C)______
C_nH_(2n+1) (B)________ (E)______ (F)______

Fill in the following blank with suitable word:

 Ethene and ethyne are examples of ..... hydrocarbons.


What is the next higher homologue of methanol (CH3OH)?


What is the difference between two consecutive homologues:
(1) in terms of molecular mass?
(2) in terms of number and kind of atoms per molecule?


Give the molecular formula of one homologue of the following:

C3H6

 


Define a homologous series. Give the name and structural formula of one homologue of the following:
CH3OH


The molecular formula of the third member of the homologous series of ketones is:
(a) C4H8O
(b) C3H6O
(c) C5H10O
(d) C6H12O


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?


Why homologous series of carbon compounds are so called? Write chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their (i) physical properties, and (ii) chemical properties.


Study the different conclusions drawn by students of a class on the basis of observations of preserved/available specimens of plants and animals.

I. Potato and sweet potato are analogous organs in plants.

II. Wings of insects and wings of birds are homologous organs in animals.

III. Wings of insects and wings of bats are analogous organs in animals.

IV. Thorns of citrus and tendrils of cucurbita are analogous organs in plants.

The correct conclusions are:

(A) I, and II

(B) II and IV

(C) I and III

(D) III and IV


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  

What is a homologous series?


The general formula of Alkane is _________________


Assertion (A): In a homologous series of alcohols, the formula for the second member is C2H5OH and the third member is C3H7OH.
Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.


Complete the following table for homologous series of Alkenes.

Name Molecular formula Condensed structural formula Number of carbon atom Number of -CH2- units Boiling point °C
Ethene C2H4 CH2 = CH2 2 0 -102
Propene C3H6 CH3–CH = CH2 3 1 -48
1-Butene C4H8 CH3–CH2–CH = CH2 ______ ______ -6.5
1-Pentene C5H10 CH3–CH2–CH2–CH = CH2 ______ ______ 30

A carbon compound ‘A’ having melting point 156K and boiling point 351K, with molecular formula C2H6O is soluble in water in all proportions.

  1. Identify ‘A’ and draw its electron dot structure.
  2. Give the molecular formulae of any two homologues of ‘A’.

Name the third homologue of aldehydes.


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