Download App

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

Rajasthan 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→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

How do you account for the formation of ethane during chlorination of methane?
→
Graphically show the total work done in an expansion when the state of an ideal gas is changed reversibly and isothermally from (pi, Vi ) to (pf, Vf ). With the help of a pV plot compare the work done in the above case with that carried out against a constant external pressure pf.
→
Explain the nomenclature of organic compounds by common name system with examples.
→
  1. When 20.0g of ammonium nitrate (NH4NO3) is dissolved in 125g of water in a coffee cup calorimeter, the temperature falls from 296.5K to 286.4K. Find the value of q for the calorimeter. (Treat heat capacity of water as the heat capacity of the calorimeter and its contents).
  2. A chemist while studying the properties of gaseous CCl2F2, a chlorofluorocarbon refrigerant, cooled a 1.25g sample at constant atmospheric pressure of 1.0atm from 320K to 293K. During cooling, the sample volume decreased from 274 to 248mL. Calculate $\Delta\text{H}$ and $\Delta\text{U}$ for the chlorofluorocarbon for this process. For CCl2F2, CP = 80.7J/ (mol K).
→
Four moles of PCl5 are heated in a closed 4dm3(L) container to reach equilibrium at 400K. At equilibrium 50% of PCl5 is dissociated. What is the value of Kc for the dissociation of PCl5 into PCl3 and Cl2 at 400K.
→
The solubility of silver chloride (AgCl) in water at 25°C is 1.06 × 10-5mol L-1. Calculate the solubility product of AgCl at this temperature.
→
The lattice enthalpy of an ionic compound is the enthalpy when one mole of an ionic compound present in its gaseous state, dissociates into its ions. It is impossible to determine it directly by experiment. Suggest and explain an indirect method to measure lattice enthalpy of NaCl(s).
→
What is common ion effect? Explain with examples.
→
Choose the correct answer.
The enthalpy of combustion of methane, graphite and dihydrogen at 298K are, –890.3kJ mol–1 –393.5kJ mol–1, and –285.8kJ mol–1 respectively. Enthalpy of formation of CH4(g) will be:
  1. –74.8kJ mol–1. 
  2. –52.27kJ mol–1.
  3. +74.8kJ mol–1.
  4. +52.26kJ mol–1.
→
What is resonance effect and it is of how many types? Explain with examples.
→