Ncert Solutions Chemistry Class 11th
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13.8. Write chemical equations for the combustion reaction of the following hydrocarbons:
(i) Butane (ii) Pentene
(iii) Hexyne (iv) Toluene
13.8. Write chemical equations for the combustion reaction of the following hydrocarbons:
(i) Butane (ii) Pentene
(iii) Hexyne (iv) Toluene
A combustion reaction is a reaction in which a substance reacts with oxygen gas, there is a formation of carbon dioxide, water with the evolution of light and heat.
(i) 2C4H10 (g) +13 O2 (g)?8CO2 (g)+10H2O (g) + Heat
(ii) 2C5H10 (g) +15 O2 (g)?10CO2 (g)+10H2O (g) + Heat
(iii) 2C6H10 (g) +17 O2 (g)?1
Upvote 
13.7. Propanal and pentan-3-one are the ozonolysis products of an alkene. What is the structural formula of the alkene?
13.7. Propanal and pentan-3-one are the ozonolysis products of an alkene. What is the structural formula of the alkene?
The ozonolysis of 4-Ethylhex-3-ene gives propanal and pentan-3-one.
The structural formula of the alkene (4-Ethylhex-3-ene) is as shown.
Upvote 3.39. Considering the elements B, C, N, F and Si, the correct order of their non-metallic character is:
(a) B>C>Si>N>F
(b) Si>C>B>N>F
(c) F>N>C>B>Si
(d) F>N>C>Si>B
3.39. Considering the elements B, C, N, F and Si, the correct order of their non-metallic character is:
(a) B>C>Si>N>F
(b) Si>C>B>N>F
(c) F>N>C>B>Si
(d) F>N>C>Si>B
3.39. In a period, the non-metallic character increases from left to right. Thus, among B, C, N and F, non-metallic character decreases in the order: F > N > C > B. However, within a group, non-metallic character decreases from top to bottom. Thus, C is more non-metallic than Si. Therefore, the
Upvote 13.6. An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.
13.6. An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.
(i) An aldehyde with molar mass of 44 u is ethanal, CH3CH=0
(ii) Write two moles of ethanal side by side with their oxygen atoms pointing towards each other.
Upvote 3.38. Considering the elements B, Al, Mg and K, the correct order of their metallic character is:
(a) B>Al>Mg>K
(b) Al>Mg>B>K
(c) Mg>Al>K>B
(d) K>Mg>Al>B
3.38. Considering the elements B, Al, Mg and K, the correct order of their metallic character is:
(a) B>Al>Mg>K
(b) Al>Mg>B>K
(c) Mg>Al>K>B
(d) K>Mg>Al>B
3.38. In a period, metallic character decreases as we move from left to right. Therefore, metallic character of K, Mg and Al decreases in the order: K > Mg > Al. However, within a group, the metallic character, increases from top to bottom. Thus, Al is more metallic than B. Therefore, the corre
Upvote 13.5. An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’.
13.5. An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’.
Step 1. Write the structure of the products side by side with their oxygen atoms pointing towards each other.
Upvote 3.37. Which of the following statements is incorrect in relation to ionization enthalpy?
(a) Ionization enthalpy increases for each successive electron.
(b) The greatest increase in ionization enthalpy is experienced on removal of electrons from core noble gas configuration.
(c) End of valence electrons is marked by a big jump in ionization enthalpy.
(d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.
3.37. Which of the following statements is incorrect in relation to ionization enthalpy?
(a) Ionization enthalpy increases for each successive electron.
(b) The greatest increase in ionization enthalpy is experienced on removal of electrons from core noble gas configuration.
(c) End of valence electrons is marked by a big jump in ionization enthalpy.
(d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.
13.3. For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
(a) C4H8 (one double bond) (b) C5H8 (one triple bond)
13.3. For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:
(a) C4H8 (one double bond) (b) C5H8 (one triple bond)
(a) Isomers of C4H8 having one double bond are:
Upvote 13.2. Write IUPAC names of the following compounds:
13.2. Write IUPAC names of the following compounds:
(a) 2-Methykbuut-2-ene
(b) Pent-1-ene-3-yne
(c) But-1,3-diene
(d) 4-Phenylbut-1-ene
(e) 2-Methyl phenol (f) 5- (2-Methylpropyl)decane
(g) 4-Ethyldeca-1,5,8-triene
Upvote