317822
Assertion : Iodination of alkanes is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\). Reason : Iodination is very slow and reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
During ionisation of alkanes, one of the products (HI) acts as strong reducing agent to reverse the reaction. \(\mathrm{CH}_{4}+\mathrm{I}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{I}+\mathrm{I}_{2}\) Therefore, iodination is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\) which utilises \(\mathrm{HI}\) formed in the reaction and give better yield of iodoalkane. \(\mathrm{HIO}_{3}+5 \mathrm{HI} \rightarrow 3 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\) So, option (1) is correct.
CHXI13:HYDROCARBONS
317823
Assertion : Oxidation of alkanes generates large heat. Reason : Heat generated by burning coal is used to generate electricity.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alkanes burn readily in presence of excess of air or oxygen to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). This process is called combustion and is accompanied by liberation of large amount of heat or light. \(\mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O} ; \Delta \mathrm{H}=-890 \mathrm{~kJ} \mathrm{~mol}^{-1}\) Given reason is a correct statement. but it's not the correct explanation of assertion. So, option (2) is correct.
CHXI13:HYDROCARBONS
317824
Which of the following releases the least amount of energy when burnt?
1 n-heptane
2 Isoheptane
3 Neoheptane
4 2, 2, 3-trimethylbutane
Explanation:
Most branched alkane is most stable and hence releases least energy when burnt.
CHXI13:HYDROCARBONS
317825
Conversion of hexane into benzene involves the reaction of
1 hydration
2 hydrolysis
3 hydrogenation
4 dehydrogenation
Explanation:
Hexane when heated to \(773 \mathrm{~L}\) at \(10-20 \mathrm{~atm}\) pressure in the presence of \(\mathrm{Cr}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}\) or \(\mathrm{Mo}_{2} \mathrm{O}_{3}\) supported over alumina gel undergoes dehydrogenation. (i.e loss of hydrogen) and cyclised to give benzene and its homologous.
MHTCET - 2018
CHXI13:HYDROCARBONS
317826
Assertion : Nitroethane \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\right)\) shows functional isomerism as well as tautomerism. Reason : Nitroethane shows tautomerism due to presence of \(\alpha\)-hydrogens and it also shows functional isomerism with ethyl nitrite.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Nitroethane has hydrogens beside a double bond and can show tautomerism. The \(\mathrm{NO}_{2}\) group can bind to the \(\alpha\) carbon via \(\mathrm{N}\) atom or \(\mathrm{O}\) atom and can show functional isomerism. \({\text{Tautomers}}\) \({\text{Functional isomers}}\) \(\mathrm{CH}_{3}-\underset{\text { Nitroethane }}{\mathrm{CH}_{2}-\mathrm{NO}_{2}}\) and \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}}\limits_{{\text{Ethyl nitrite }}} - {\text{O}} - {\text{N}} = {\text{O }}\) So, option (1) is correct.
317822
Assertion : Iodination of alkanes is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\). Reason : Iodination is very slow and reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
During ionisation of alkanes, one of the products (HI) acts as strong reducing agent to reverse the reaction. \(\mathrm{CH}_{4}+\mathrm{I}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{I}+\mathrm{I}_{2}\) Therefore, iodination is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\) which utilises \(\mathrm{HI}\) formed in the reaction and give better yield of iodoalkane. \(\mathrm{HIO}_{3}+5 \mathrm{HI} \rightarrow 3 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\) So, option (1) is correct.
CHXI13:HYDROCARBONS
317823
Assertion : Oxidation of alkanes generates large heat. Reason : Heat generated by burning coal is used to generate electricity.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alkanes burn readily in presence of excess of air or oxygen to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). This process is called combustion and is accompanied by liberation of large amount of heat or light. \(\mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O} ; \Delta \mathrm{H}=-890 \mathrm{~kJ} \mathrm{~mol}^{-1}\) Given reason is a correct statement. but it's not the correct explanation of assertion. So, option (2) is correct.
CHXI13:HYDROCARBONS
317824
Which of the following releases the least amount of energy when burnt?
1 n-heptane
2 Isoheptane
3 Neoheptane
4 2, 2, 3-trimethylbutane
Explanation:
Most branched alkane is most stable and hence releases least energy when burnt.
CHXI13:HYDROCARBONS
317825
Conversion of hexane into benzene involves the reaction of
1 hydration
2 hydrolysis
3 hydrogenation
4 dehydrogenation
Explanation:
Hexane when heated to \(773 \mathrm{~L}\) at \(10-20 \mathrm{~atm}\) pressure in the presence of \(\mathrm{Cr}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}\) or \(\mathrm{Mo}_{2} \mathrm{O}_{3}\) supported over alumina gel undergoes dehydrogenation. (i.e loss of hydrogen) and cyclised to give benzene and its homologous.
MHTCET - 2018
CHXI13:HYDROCARBONS
317826
Assertion : Nitroethane \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\right)\) shows functional isomerism as well as tautomerism. Reason : Nitroethane shows tautomerism due to presence of \(\alpha\)-hydrogens and it also shows functional isomerism with ethyl nitrite.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Nitroethane has hydrogens beside a double bond and can show tautomerism. The \(\mathrm{NO}_{2}\) group can bind to the \(\alpha\) carbon via \(\mathrm{N}\) atom or \(\mathrm{O}\) atom and can show functional isomerism. \({\text{Tautomers}}\) \({\text{Functional isomers}}\) \(\mathrm{CH}_{3}-\underset{\text { Nitroethane }}{\mathrm{CH}_{2}-\mathrm{NO}_{2}}\) and \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}}\limits_{{\text{Ethyl nitrite }}} - {\text{O}} - {\text{N}} = {\text{O }}\) So, option (1) is correct.
317822
Assertion : Iodination of alkanes is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\). Reason : Iodination is very slow and reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
During ionisation of alkanes, one of the products (HI) acts as strong reducing agent to reverse the reaction. \(\mathrm{CH}_{4}+\mathrm{I}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{I}+\mathrm{I}_{2}\) Therefore, iodination is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\) which utilises \(\mathrm{HI}\) formed in the reaction and give better yield of iodoalkane. \(\mathrm{HIO}_{3}+5 \mathrm{HI} \rightarrow 3 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\) So, option (1) is correct.
CHXI13:HYDROCARBONS
317823
Assertion : Oxidation of alkanes generates large heat. Reason : Heat generated by burning coal is used to generate electricity.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alkanes burn readily in presence of excess of air or oxygen to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). This process is called combustion and is accompanied by liberation of large amount of heat or light. \(\mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O} ; \Delta \mathrm{H}=-890 \mathrm{~kJ} \mathrm{~mol}^{-1}\) Given reason is a correct statement. but it's not the correct explanation of assertion. So, option (2) is correct.
CHXI13:HYDROCARBONS
317824
Which of the following releases the least amount of energy when burnt?
1 n-heptane
2 Isoheptane
3 Neoheptane
4 2, 2, 3-trimethylbutane
Explanation:
Most branched alkane is most stable and hence releases least energy when burnt.
CHXI13:HYDROCARBONS
317825
Conversion of hexane into benzene involves the reaction of
1 hydration
2 hydrolysis
3 hydrogenation
4 dehydrogenation
Explanation:
Hexane when heated to \(773 \mathrm{~L}\) at \(10-20 \mathrm{~atm}\) pressure in the presence of \(\mathrm{Cr}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}\) or \(\mathrm{Mo}_{2} \mathrm{O}_{3}\) supported over alumina gel undergoes dehydrogenation. (i.e loss of hydrogen) and cyclised to give benzene and its homologous.
MHTCET - 2018
CHXI13:HYDROCARBONS
317826
Assertion : Nitroethane \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\right)\) shows functional isomerism as well as tautomerism. Reason : Nitroethane shows tautomerism due to presence of \(\alpha\)-hydrogens and it also shows functional isomerism with ethyl nitrite.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Nitroethane has hydrogens beside a double bond and can show tautomerism. The \(\mathrm{NO}_{2}\) group can bind to the \(\alpha\) carbon via \(\mathrm{N}\) atom or \(\mathrm{O}\) atom and can show functional isomerism. \({\text{Tautomers}}\) \({\text{Functional isomers}}\) \(\mathrm{CH}_{3}-\underset{\text { Nitroethane }}{\mathrm{CH}_{2}-\mathrm{NO}_{2}}\) and \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}}\limits_{{\text{Ethyl nitrite }}} - {\text{O}} - {\text{N}} = {\text{O }}\) So, option (1) is correct.
317822
Assertion : Iodination of alkanes is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\). Reason : Iodination is very slow and reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
During ionisation of alkanes, one of the products (HI) acts as strong reducing agent to reverse the reaction. \(\mathrm{CH}_{4}+\mathrm{I}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{I}+\mathrm{I}_{2}\) Therefore, iodination is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\) which utilises \(\mathrm{HI}\) formed in the reaction and give better yield of iodoalkane. \(\mathrm{HIO}_{3}+5 \mathrm{HI} \rightarrow 3 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\) So, option (1) is correct.
CHXI13:HYDROCARBONS
317823
Assertion : Oxidation of alkanes generates large heat. Reason : Heat generated by burning coal is used to generate electricity.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alkanes burn readily in presence of excess of air or oxygen to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). This process is called combustion and is accompanied by liberation of large amount of heat or light. \(\mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O} ; \Delta \mathrm{H}=-890 \mathrm{~kJ} \mathrm{~mol}^{-1}\) Given reason is a correct statement. but it's not the correct explanation of assertion. So, option (2) is correct.
CHXI13:HYDROCARBONS
317824
Which of the following releases the least amount of energy when burnt?
1 n-heptane
2 Isoheptane
3 Neoheptane
4 2, 2, 3-trimethylbutane
Explanation:
Most branched alkane is most stable and hence releases least energy when burnt.
CHXI13:HYDROCARBONS
317825
Conversion of hexane into benzene involves the reaction of
1 hydration
2 hydrolysis
3 hydrogenation
4 dehydrogenation
Explanation:
Hexane when heated to \(773 \mathrm{~L}\) at \(10-20 \mathrm{~atm}\) pressure in the presence of \(\mathrm{Cr}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}\) or \(\mathrm{Mo}_{2} \mathrm{O}_{3}\) supported over alumina gel undergoes dehydrogenation. (i.e loss of hydrogen) and cyclised to give benzene and its homologous.
MHTCET - 2018
CHXI13:HYDROCARBONS
317826
Assertion : Nitroethane \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\right)\) shows functional isomerism as well as tautomerism. Reason : Nitroethane shows tautomerism due to presence of \(\alpha\)-hydrogens and it also shows functional isomerism with ethyl nitrite.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Nitroethane has hydrogens beside a double bond and can show tautomerism. The \(\mathrm{NO}_{2}\) group can bind to the \(\alpha\) carbon via \(\mathrm{N}\) atom or \(\mathrm{O}\) atom and can show functional isomerism. \({\text{Tautomers}}\) \({\text{Functional isomers}}\) \(\mathrm{CH}_{3}-\underset{\text { Nitroethane }}{\mathrm{CH}_{2}-\mathrm{NO}_{2}}\) and \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}}\limits_{{\text{Ethyl nitrite }}} - {\text{O}} - {\text{N}} = {\text{O }}\) So, option (1) is correct.
317822
Assertion : Iodination of alkanes is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\). Reason : Iodination is very slow and reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
During ionisation of alkanes, one of the products (HI) acts as strong reducing agent to reverse the reaction. \(\mathrm{CH}_{4}+\mathrm{I}_{2} \rightarrow \mathrm{CH}_{3} \mathrm{I}+\mathrm{I}_{2}\) Therefore, iodination is made in presence of \(\mathrm{HgO}\) or \(\mathrm{HIO}_{3}\) which utilises \(\mathrm{HI}\) formed in the reaction and give better yield of iodoalkane. \(\mathrm{HIO}_{3}+5 \mathrm{HI} \rightarrow 3 \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}\) So, option (1) is correct.
CHXI13:HYDROCARBONS
317823
Assertion : Oxidation of alkanes generates large heat. Reason : Heat generated by burning coal is used to generate electricity.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Alkanes burn readily in presence of excess of air or oxygen to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). This process is called combustion and is accompanied by liberation of large amount of heat or light. \(\mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{2} \mathrm{O} ; \Delta \mathrm{H}=-890 \mathrm{~kJ} \mathrm{~mol}^{-1}\) Given reason is a correct statement. but it's not the correct explanation of assertion. So, option (2) is correct.
CHXI13:HYDROCARBONS
317824
Which of the following releases the least amount of energy when burnt?
1 n-heptane
2 Isoheptane
3 Neoheptane
4 2, 2, 3-trimethylbutane
Explanation:
Most branched alkane is most stable and hence releases least energy when burnt.
CHXI13:HYDROCARBONS
317825
Conversion of hexane into benzene involves the reaction of
1 hydration
2 hydrolysis
3 hydrogenation
4 dehydrogenation
Explanation:
Hexane when heated to \(773 \mathrm{~L}\) at \(10-20 \mathrm{~atm}\) pressure in the presence of \(\mathrm{Cr}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{5}\) or \(\mathrm{Mo}_{2} \mathrm{O}_{3}\) supported over alumina gel undergoes dehydrogenation. (i.e loss of hydrogen) and cyclised to give benzene and its homologous.
MHTCET - 2018
CHXI13:HYDROCARBONS
317826
Assertion : Nitroethane \(\left(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{NO}_{2}\right)\) shows functional isomerism as well as tautomerism. Reason : Nitroethane shows tautomerism due to presence of \(\alpha\)-hydrogens and it also shows functional isomerism with ethyl nitrite.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Nitroethane has hydrogens beside a double bond and can show tautomerism. The \(\mathrm{NO}_{2}\) group can bind to the \(\alpha\) carbon via \(\mathrm{N}\) atom or \(\mathrm{O}\) atom and can show functional isomerism. \({\text{Tautomers}}\) \({\text{Functional isomers}}\) \(\mathrm{CH}_{3}-\underset{\text { Nitroethane }}{\mathrm{CH}_{2}-\mathrm{NO}_{2}}\) and \(\mathop {{\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}}\limits_{{\text{Ethyl nitrite }}} - {\text{O}} - {\text{N}} = {\text{O }}\) So, option (1) is correct.
