Download App

Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques5 Marks
Question
Note: Consider structures I to VII and answer the questions:
  1. $\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{CH}_2-\text{OH}$
  2. $\text{CH}_3-\text{CH}_2-\text{CH}-\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{OH}$
  3. $\ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ |\\\text{CH}_3-\text{C}-\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \text{OH}$
  4. $\text{CH}_3-\text{CH}-\text{CH}_2-\text{OH}\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
  5. $\text{CH}_3-\text{CH}_2-\text{O}-\text{CH}_2-\text{CH}_3$
  6. $\text{CH}_3-\text{O}-\text{CH}_2-\text{CH}_2-\text{CH}_3$
  7. $\text{CH}_3-\text{O}-\text{CH}-\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
Which of the above compounds form pairs of metamers?
✓

Answer

When two or more compounds have same molecular formula but different alkyl groups on either side of the functional group, the compounds are called metameres. In the given structures V and VI or VI and VII form a pair of metameres because alkyl groups are different on either side of the functional group -0.,
  1. $\text{CH}_3-\text{CH}_2-\text{O}-\text{CH}_2-\text{CH}_3${Metameres}
  2. $\text{CH}_3-\text{O}-\text{CH}_2-\text{CH}_2-\text{CH}_3${Metameres}
and
  1. $\text{CH}_3-\text{O}-\text{CH}_2-\text{CH}_2-\text{CH}_3${Metameres}
  2. $\text{CH}_3-\text{O}-\text{CH}-\text{CH}_3\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$(Metameres}

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Organic Chemistry: Some Basic Principles and Techniques→Organic Chemistry: Some Basic Principles and Techniques — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Briefly describe the valence bond theory of covalent bond formation by taking an example of hydrogen. How can you interpret energy changes taking place in the formation of dihydrogen?
→
Which of the following reactions involve homogeneous equilibria and which involve heterogeneous equilibria?
  1. $2\text{N}_2\text{O(g)}\rightleftharpoons2\text{N}_2(\text{g})+\text{O}_2\text{(g)}$
  2. $2\text{NH}_3\text{(g)}\rightleftharpoons\text{N}_2(\text{g})+3\text{H}_2\text{(g)}$
  3. $2\text{Cu}(\text{NO}_3)_2(\text{s})\rightleftharpoons2\text{CuO(s)}+4\text{NO}_2(\text{g})+\text{O}_2(\text{g})$
  4. $\text{CH}_3\text{COOC}_2\text{H}_5(\text{aq})+\text{H}_2\text{O}\text{l}\\\rightleftharpoons\text{CH}_3\text{COOH(aq)}+\text{C}_2\text{H}_5\text{OH(aq)}$
  5. $\text{Fe}^{3+}(\text{aq})+\text{3OH}^-\text{(aq)}\rightleftharpoons\text{Fe(OH)}_3(\text{s})$
→
Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium:$2\text{BrCl (g)}\rightleftharpoons\text{Br}_2\text{ (g) + Cl}_2\text{ (g)}$for which $K_c= 32$ at $500K$. If initially pure BrCl is present at a concentration of
$3.3 \times 10^{–3} mol L^{–1}$, what is its molar concentration in the mixture at equilibrium?
→
Arrange in properties:
  1. $HF, HCI, HBr, HI$ [Thermal stability]
  2. $LiF, LiCI, LiBr, Lil$ [Ionic character]
  3. $PH_3, PCI_3, PF_3,$ [Covalent character]
  4. $H_2O, NH_3, H_2S, HF$ [Polarity]
  5. $BeCl_2, BCI_3, CCI_4, PCI_3,$ [Bond angle]
→
Match the terms mentioned in Column I with the terms in Column II.
 
Column I
 
Column II
(i)
Carbocation
(a)
Cyclohexane and 1- hexene.
(ii)
Nucleophile
(b)
Conjugation of electrons of C–H σ bond with empty p-orbital present at adjacent positively charged carbon.
(iii)
Hyperconjugation
(c)
$\text{sp}^2$ hybridised carbon with empty p-orbital.
(iv)
Isomers
(d)
Ethyne
(v)
sp hybridisation
(e)
Species that can receive a pair of electrons.
(vi)
Electrophile
(f)
Species that can supply a pair of electrons.
→
Pay load is defined as the difference between the mass of displaced air and the mass of the balloon. Calculate the pay load when a balloon of radius $10 \ m$ , mass $100 \ kg$ is filled with helium at 1.66 bar at $27^{\circ} C$. (Density of air $=1.2 kg$ $m ^{-3}$ and $R =0.083 bar dm ^3 K^{-1} mol^{-1}$ ).
→
1. What is the general molecular formula of saturated monohydric alcohols?
2. Write structural formulae for compounds named as-
a. 1-Bromoheptane
b. 5-Bromoheptanoic acid
→
Predict the products of electrolysis in the following:
An aqueous solution of $CuCl_2$ with platinum electrodes.
→
  1. Predict the sign of the entropy change for each of the following changes:
  1. Hg(l) → Hg(g)
  2. Steam → Water
  1.  
  1. Define Gibb's Energy. Give its mathematical expression. What is Gibb's energy criteria for spontaneity.
  2. Give a brief note on the following thermodynamic terms:
  • Standard enthalpy of combustion.
  • Standard enthalpy of formation.
→
Explain the Liebig's combustion process for analysis of carbon and hydrogen.
→