273042
The bond energy of an $\mathrm{O}-\mathrm{H}$ bond is 109 $\mathrm{kcal} / \mathrm{mol}$. When a mole of water is formed, then
1 109 kcals is released
2 218 kcals is absorbed
3 109 kcals is absorbed
4 $218 \mathrm{kcals}$ is released
Explanation:
Bond energy of a $\mathrm{O}-\mathrm{H}$ bond $=109 \mathrm{kcal} / \mathrm{mol}$ When one mole of $\mathrm{H}_2 \mathrm{O}$ is formed, energy will be released. Therefore, heat released $=-109 \times 2$ $=-218 \mathrm{kcal} / \mathrm{mol}$ $\therefore$ Energy released in the formation of 1 mole of water $=218 \mathrm{kcal} / \mathrm{mol}$
J and K CET-(2003)
Thermodynamics
273047
The bond energy is the energy required to
1 dissociate one mole of the substance
2 dissociate bond in $1 \mathrm{~kg}$ of the substance
3 break one mole of similar bonds
4 break bonds in one mole of substance
Explanation:
Bond Energy is the measures of Bond strength in a chemical Bond it is the energy or Heat required to break one mole of molecule into their individual atom.
MHT CET-2007
Thermodynamics
273051
C-H bond energy is about $101 \mathrm{Kcal} / \mathrm{mol}$ for methane, ethane and other alkanes but is only $77 \mathrm{kcal} / \mathrm{mol}$ for $\mathrm{C}-\mathrm{H}$ bond of $\mathrm{CH}_3$ in toluene. this is because:
1 of inductive effect due to $-\mathrm{CH}_3$ in toluene of
2 of the presence of benzene ring in toluene
3 of resonance among the structures of benzyl radical in toluene
4 aromaticity of toluene
Explanation:
$\mathrm{C}-\mathrm{H}$ bond in toluene has partial double bond character due to resonance. $\therefore \mathrm{C}-\mathrm{H}$ bond in toluene has less energy as compared to others.
UPTU/UPSEE-2005
Thermodynamics
273028
The bond energies of $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$ are 155 , 244,193 and $151 \mathrm{~kJ} / \mathrm{mol}$. The weakest bond will be in
1 $\mathrm{Cl}_2$
2 $\mathrm{I}_2$
3 $\mathrm{Br}_2$
4 $\mathrm{F}_2$
Explanation:
$\mathrm{I}_2$ has weakest bond among the halogens because due to big size of iodine, the bond length is $266 \mathrm{pm}$. As well as bond length decreases, the bond dissociation energy increases- Hence, the correct option is (b).
AMU 2002
Thermodynamics
273034
The $\mathrm{C}-\mathrm{C}$ bond dissociation energy in $\mathrm{kcal} / \mathrm{mol}$ is-
1 8.1
2 0.81
3 81
4 810
Explanation:
$\mathrm{C}-\mathrm{C}$ Bond the amount of bond dissociation Energy is $81 \mathrm{kcal} / \mathrm{mol}$ (or $347 \mathrm{~kJ} / \mathrm{mol}$ ).
273042
The bond energy of an $\mathrm{O}-\mathrm{H}$ bond is 109 $\mathrm{kcal} / \mathrm{mol}$. When a mole of water is formed, then
1 109 kcals is released
2 218 kcals is absorbed
3 109 kcals is absorbed
4 $218 \mathrm{kcals}$ is released
Explanation:
Bond energy of a $\mathrm{O}-\mathrm{H}$ bond $=109 \mathrm{kcal} / \mathrm{mol}$ When one mole of $\mathrm{H}_2 \mathrm{O}$ is formed, energy will be released. Therefore, heat released $=-109 \times 2$ $=-218 \mathrm{kcal} / \mathrm{mol}$ $\therefore$ Energy released in the formation of 1 mole of water $=218 \mathrm{kcal} / \mathrm{mol}$
J and K CET-(2003)
Thermodynamics
273047
The bond energy is the energy required to
1 dissociate one mole of the substance
2 dissociate bond in $1 \mathrm{~kg}$ of the substance
3 break one mole of similar bonds
4 break bonds in one mole of substance
Explanation:
Bond Energy is the measures of Bond strength in a chemical Bond it is the energy or Heat required to break one mole of molecule into their individual atom.
MHT CET-2007
Thermodynamics
273051
C-H bond energy is about $101 \mathrm{Kcal} / \mathrm{mol}$ for methane, ethane and other alkanes but is only $77 \mathrm{kcal} / \mathrm{mol}$ for $\mathrm{C}-\mathrm{H}$ bond of $\mathrm{CH}_3$ in toluene. this is because:
1 of inductive effect due to $-\mathrm{CH}_3$ in toluene of
2 of the presence of benzene ring in toluene
3 of resonance among the structures of benzyl radical in toluene
4 aromaticity of toluene
Explanation:
$\mathrm{C}-\mathrm{H}$ bond in toluene has partial double bond character due to resonance. $\therefore \mathrm{C}-\mathrm{H}$ bond in toluene has less energy as compared to others.
UPTU/UPSEE-2005
Thermodynamics
273028
The bond energies of $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$ are 155 , 244,193 and $151 \mathrm{~kJ} / \mathrm{mol}$. The weakest bond will be in
1 $\mathrm{Cl}_2$
2 $\mathrm{I}_2$
3 $\mathrm{Br}_2$
4 $\mathrm{F}_2$
Explanation:
$\mathrm{I}_2$ has weakest bond among the halogens because due to big size of iodine, the bond length is $266 \mathrm{pm}$. As well as bond length decreases, the bond dissociation energy increases- Hence, the correct option is (b).
AMU 2002
Thermodynamics
273034
The $\mathrm{C}-\mathrm{C}$ bond dissociation energy in $\mathrm{kcal} / \mathrm{mol}$ is-
1 8.1
2 0.81
3 81
4 810
Explanation:
$\mathrm{C}-\mathrm{C}$ Bond the amount of bond dissociation Energy is $81 \mathrm{kcal} / \mathrm{mol}$ (or $347 \mathrm{~kJ} / \mathrm{mol}$ ).
273042
The bond energy of an $\mathrm{O}-\mathrm{H}$ bond is 109 $\mathrm{kcal} / \mathrm{mol}$. When a mole of water is formed, then
1 109 kcals is released
2 218 kcals is absorbed
3 109 kcals is absorbed
4 $218 \mathrm{kcals}$ is released
Explanation:
Bond energy of a $\mathrm{O}-\mathrm{H}$ bond $=109 \mathrm{kcal} / \mathrm{mol}$ When one mole of $\mathrm{H}_2 \mathrm{O}$ is formed, energy will be released. Therefore, heat released $=-109 \times 2$ $=-218 \mathrm{kcal} / \mathrm{mol}$ $\therefore$ Energy released in the formation of 1 mole of water $=218 \mathrm{kcal} / \mathrm{mol}$
J and K CET-(2003)
Thermodynamics
273047
The bond energy is the energy required to
1 dissociate one mole of the substance
2 dissociate bond in $1 \mathrm{~kg}$ of the substance
3 break one mole of similar bonds
4 break bonds in one mole of substance
Explanation:
Bond Energy is the measures of Bond strength in a chemical Bond it is the energy or Heat required to break one mole of molecule into their individual atom.
MHT CET-2007
Thermodynamics
273051
C-H bond energy is about $101 \mathrm{Kcal} / \mathrm{mol}$ for methane, ethane and other alkanes but is only $77 \mathrm{kcal} / \mathrm{mol}$ for $\mathrm{C}-\mathrm{H}$ bond of $\mathrm{CH}_3$ in toluene. this is because:
1 of inductive effect due to $-\mathrm{CH}_3$ in toluene of
2 of the presence of benzene ring in toluene
3 of resonance among the structures of benzyl radical in toluene
4 aromaticity of toluene
Explanation:
$\mathrm{C}-\mathrm{H}$ bond in toluene has partial double bond character due to resonance. $\therefore \mathrm{C}-\mathrm{H}$ bond in toluene has less energy as compared to others.
UPTU/UPSEE-2005
Thermodynamics
273028
The bond energies of $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$ are 155 , 244,193 and $151 \mathrm{~kJ} / \mathrm{mol}$. The weakest bond will be in
1 $\mathrm{Cl}_2$
2 $\mathrm{I}_2$
3 $\mathrm{Br}_2$
4 $\mathrm{F}_2$
Explanation:
$\mathrm{I}_2$ has weakest bond among the halogens because due to big size of iodine, the bond length is $266 \mathrm{pm}$. As well as bond length decreases, the bond dissociation energy increases- Hence, the correct option is (b).
AMU 2002
Thermodynamics
273034
The $\mathrm{C}-\mathrm{C}$ bond dissociation energy in $\mathrm{kcal} / \mathrm{mol}$ is-
1 8.1
2 0.81
3 81
4 810
Explanation:
$\mathrm{C}-\mathrm{C}$ Bond the amount of bond dissociation Energy is $81 \mathrm{kcal} / \mathrm{mol}$ (or $347 \mathrm{~kJ} / \mathrm{mol}$ ).
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Thermodynamics
273042
The bond energy of an $\mathrm{O}-\mathrm{H}$ bond is 109 $\mathrm{kcal} / \mathrm{mol}$. When a mole of water is formed, then
1 109 kcals is released
2 218 kcals is absorbed
3 109 kcals is absorbed
4 $218 \mathrm{kcals}$ is released
Explanation:
Bond energy of a $\mathrm{O}-\mathrm{H}$ bond $=109 \mathrm{kcal} / \mathrm{mol}$ When one mole of $\mathrm{H}_2 \mathrm{O}$ is formed, energy will be released. Therefore, heat released $=-109 \times 2$ $=-218 \mathrm{kcal} / \mathrm{mol}$ $\therefore$ Energy released in the formation of 1 mole of water $=218 \mathrm{kcal} / \mathrm{mol}$
J and K CET-(2003)
Thermodynamics
273047
The bond energy is the energy required to
1 dissociate one mole of the substance
2 dissociate bond in $1 \mathrm{~kg}$ of the substance
3 break one mole of similar bonds
4 break bonds in one mole of substance
Explanation:
Bond Energy is the measures of Bond strength in a chemical Bond it is the energy or Heat required to break one mole of molecule into their individual atom.
MHT CET-2007
Thermodynamics
273051
C-H bond energy is about $101 \mathrm{Kcal} / \mathrm{mol}$ for methane, ethane and other alkanes but is only $77 \mathrm{kcal} / \mathrm{mol}$ for $\mathrm{C}-\mathrm{H}$ bond of $\mathrm{CH}_3$ in toluene. this is because:
1 of inductive effect due to $-\mathrm{CH}_3$ in toluene of
2 of the presence of benzene ring in toluene
3 of resonance among the structures of benzyl radical in toluene
4 aromaticity of toluene
Explanation:
$\mathrm{C}-\mathrm{H}$ bond in toluene has partial double bond character due to resonance. $\therefore \mathrm{C}-\mathrm{H}$ bond in toluene has less energy as compared to others.
UPTU/UPSEE-2005
Thermodynamics
273028
The bond energies of $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$ are 155 , 244,193 and $151 \mathrm{~kJ} / \mathrm{mol}$. The weakest bond will be in
1 $\mathrm{Cl}_2$
2 $\mathrm{I}_2$
3 $\mathrm{Br}_2$
4 $\mathrm{F}_2$
Explanation:
$\mathrm{I}_2$ has weakest bond among the halogens because due to big size of iodine, the bond length is $266 \mathrm{pm}$. As well as bond length decreases, the bond dissociation energy increases- Hence, the correct option is (b).
AMU 2002
Thermodynamics
273034
The $\mathrm{C}-\mathrm{C}$ bond dissociation energy in $\mathrm{kcal} / \mathrm{mol}$ is-
1 8.1
2 0.81
3 81
4 810
Explanation:
$\mathrm{C}-\mathrm{C}$ Bond the amount of bond dissociation Energy is $81 \mathrm{kcal} / \mathrm{mol}$ (or $347 \mathrm{~kJ} / \mathrm{mol}$ ).
273042
The bond energy of an $\mathrm{O}-\mathrm{H}$ bond is 109 $\mathrm{kcal} / \mathrm{mol}$. When a mole of water is formed, then
1 109 kcals is released
2 218 kcals is absorbed
3 109 kcals is absorbed
4 $218 \mathrm{kcals}$ is released
Explanation:
Bond energy of a $\mathrm{O}-\mathrm{H}$ bond $=109 \mathrm{kcal} / \mathrm{mol}$ When one mole of $\mathrm{H}_2 \mathrm{O}$ is formed, energy will be released. Therefore, heat released $=-109 \times 2$ $=-218 \mathrm{kcal} / \mathrm{mol}$ $\therefore$ Energy released in the formation of 1 mole of water $=218 \mathrm{kcal} / \mathrm{mol}$
J and K CET-(2003)
Thermodynamics
273047
The bond energy is the energy required to
1 dissociate one mole of the substance
2 dissociate bond in $1 \mathrm{~kg}$ of the substance
3 break one mole of similar bonds
4 break bonds in one mole of substance
Explanation:
Bond Energy is the measures of Bond strength in a chemical Bond it is the energy or Heat required to break one mole of molecule into their individual atom.
MHT CET-2007
Thermodynamics
273051
C-H bond energy is about $101 \mathrm{Kcal} / \mathrm{mol}$ for methane, ethane and other alkanes but is only $77 \mathrm{kcal} / \mathrm{mol}$ for $\mathrm{C}-\mathrm{H}$ bond of $\mathrm{CH}_3$ in toluene. this is because:
1 of inductive effect due to $-\mathrm{CH}_3$ in toluene of
2 of the presence of benzene ring in toluene
3 of resonance among the structures of benzyl radical in toluene
4 aromaticity of toluene
Explanation:
$\mathrm{C}-\mathrm{H}$ bond in toluene has partial double bond character due to resonance. $\therefore \mathrm{C}-\mathrm{H}$ bond in toluene has less energy as compared to others.
UPTU/UPSEE-2005
Thermodynamics
273028
The bond energies of $\mathrm{F}_2, \mathrm{Cl}_2, \mathrm{Br}_2$ and $\mathrm{I}_2$ are 155 , 244,193 and $151 \mathrm{~kJ} / \mathrm{mol}$. The weakest bond will be in
1 $\mathrm{Cl}_2$
2 $\mathrm{I}_2$
3 $\mathrm{Br}_2$
4 $\mathrm{F}_2$
Explanation:
$\mathrm{I}_2$ has weakest bond among the halogens because due to big size of iodine, the bond length is $266 \mathrm{pm}$. As well as bond length decreases, the bond dissociation energy increases- Hence, the correct option is (b).
AMU 2002
Thermodynamics
273034
The $\mathrm{C}-\mathrm{C}$ bond dissociation energy in $\mathrm{kcal} / \mathrm{mol}$ is-
1 8.1
2 0.81
3 81
4 810
Explanation:
$\mathrm{C}-\mathrm{C}$ Bond the amount of bond dissociation Energy is $81 \mathrm{kcal} / \mathrm{mol}$ (or $347 \mathrm{~kJ} / \mathrm{mol}$ ).
