NEET Test Series from KOTA - 10 Papers In MS WORD
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Hydrocarbons
230339
A reagent used to test for unsaturation in alkenes is
1 Ammonical $\mathrm{AgNO}_3$
2 conc. $\mathrm{H}_2 \mathrm{SO}_4$
3 Solution of $\mathrm{Br}_2$ in $\mathrm{CCl}_4$
4 Ammoniacal $\mathrm{Cu}_2 \mathrm{Cl}_2$.
Explanation:
: The solution of bromine $\left(\mathrm{Br}_2\right)$ in carbon tetrachloride $\left(\mathrm{CCl}_4\right)$ as solvent is used to test for unsaturation in alkene, because alkene will turn brown bromine water colourless as the bromine reacts with the carbon-carbon double bond.
COMEDK 2018
Hydrocarbons
230341
Which one of the following reactions yield 2Ebutene as the major product?
: At low temperature, when alkynes are reacted with $\mathrm{Li}$ or $\mathrm{Na}$ metal in $\mathrm{NH}_3$ then anti addition of hydrogen atoms take place and E product is obtained.
AP-EAMCET (Medical)
Hydrocarbons
230345
The reaction \(\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow[300^{\circ} \mathrm{C}]{\mathrm{Ni}} \mathrm{CH}_3-\mathrm{CH}_3\)
1 Wurtz reaction
2 Kolbe reaction
3 Sabatier - Sender's reaction
4 Dow's reaction
Explanation:
: $\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \underset{\mathrm{Ni}^{\circ} \mathrm{C}}{\mathrm{N}} \mathrm{CH}_3-\mathrm{CH}_3$ Sabatier-Sender's reaction is the reaction in which preparation of ethane is done by the catalytic hydrogenation of ethene. This reduction is carried out in the presence of catalyst like nickel.
Shift-I]**
Hydrocarbons
230347
The major product of the following reaction is: $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \underset{\text { Rhacatalyst }}{\stackrel{\text { H, } / \mathrm{CO}}{\longrightarrow}}$
: Reaction of alkene with $\mathrm{H}_2 / \mathrm{CO}$ in the presence of Rhodium as catalyst is given below:- \(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { Rh catalyst }]{\mathrm{H}_2 / \mathrm{CO}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CHO}\)
230339
A reagent used to test for unsaturation in alkenes is
1 Ammonical $\mathrm{AgNO}_3$
2 conc. $\mathrm{H}_2 \mathrm{SO}_4$
3 Solution of $\mathrm{Br}_2$ in $\mathrm{CCl}_4$
4 Ammoniacal $\mathrm{Cu}_2 \mathrm{Cl}_2$.
Explanation:
: The solution of bromine $\left(\mathrm{Br}_2\right)$ in carbon tetrachloride $\left(\mathrm{CCl}_4\right)$ as solvent is used to test for unsaturation in alkene, because alkene will turn brown bromine water colourless as the bromine reacts with the carbon-carbon double bond.
COMEDK 2018
Hydrocarbons
230341
Which one of the following reactions yield 2Ebutene as the major product?
: At low temperature, when alkynes are reacted with $\mathrm{Li}$ or $\mathrm{Na}$ metal in $\mathrm{NH}_3$ then anti addition of hydrogen atoms take place and E product is obtained.
AP-EAMCET (Medical)
Hydrocarbons
230345
The reaction \(\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow[300^{\circ} \mathrm{C}]{\mathrm{Ni}} \mathrm{CH}_3-\mathrm{CH}_3\)
1 Wurtz reaction
2 Kolbe reaction
3 Sabatier - Sender's reaction
4 Dow's reaction
Explanation:
: $\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \underset{\mathrm{Ni}^{\circ} \mathrm{C}}{\mathrm{N}} \mathrm{CH}_3-\mathrm{CH}_3$ Sabatier-Sender's reaction is the reaction in which preparation of ethane is done by the catalytic hydrogenation of ethene. This reduction is carried out in the presence of catalyst like nickel.
Shift-I]**
Hydrocarbons
230347
The major product of the following reaction is: $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \underset{\text { Rhacatalyst }}{\stackrel{\text { H, } / \mathrm{CO}}{\longrightarrow}}$
: Reaction of alkene with $\mathrm{H}_2 / \mathrm{CO}$ in the presence of Rhodium as catalyst is given below:- \(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { Rh catalyst }]{\mathrm{H}_2 / \mathrm{CO}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CHO}\)
230339
A reagent used to test for unsaturation in alkenes is
1 Ammonical $\mathrm{AgNO}_3$
2 conc. $\mathrm{H}_2 \mathrm{SO}_4$
3 Solution of $\mathrm{Br}_2$ in $\mathrm{CCl}_4$
4 Ammoniacal $\mathrm{Cu}_2 \mathrm{Cl}_2$.
Explanation:
: The solution of bromine $\left(\mathrm{Br}_2\right)$ in carbon tetrachloride $\left(\mathrm{CCl}_4\right)$ as solvent is used to test for unsaturation in alkene, because alkene will turn brown bromine water colourless as the bromine reacts with the carbon-carbon double bond.
COMEDK 2018
Hydrocarbons
230341
Which one of the following reactions yield 2Ebutene as the major product?
: At low temperature, when alkynes are reacted with $\mathrm{Li}$ or $\mathrm{Na}$ metal in $\mathrm{NH}_3$ then anti addition of hydrogen atoms take place and E product is obtained.
AP-EAMCET (Medical)
Hydrocarbons
230345
The reaction \(\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow[300^{\circ} \mathrm{C}]{\mathrm{Ni}} \mathrm{CH}_3-\mathrm{CH}_3\)
1 Wurtz reaction
2 Kolbe reaction
3 Sabatier - Sender's reaction
4 Dow's reaction
Explanation:
: $\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \underset{\mathrm{Ni}^{\circ} \mathrm{C}}{\mathrm{N}} \mathrm{CH}_3-\mathrm{CH}_3$ Sabatier-Sender's reaction is the reaction in which preparation of ethane is done by the catalytic hydrogenation of ethene. This reduction is carried out in the presence of catalyst like nickel.
Shift-I]**
Hydrocarbons
230347
The major product of the following reaction is: $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \underset{\text { Rhacatalyst }}{\stackrel{\text { H, } / \mathrm{CO}}{\longrightarrow}}$
: Reaction of alkene with $\mathrm{H}_2 / \mathrm{CO}$ in the presence of Rhodium as catalyst is given below:- \(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { Rh catalyst }]{\mathrm{H}_2 / \mathrm{CO}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CHO}\)
230339
A reagent used to test for unsaturation in alkenes is
1 Ammonical $\mathrm{AgNO}_3$
2 conc. $\mathrm{H}_2 \mathrm{SO}_4$
3 Solution of $\mathrm{Br}_2$ in $\mathrm{CCl}_4$
4 Ammoniacal $\mathrm{Cu}_2 \mathrm{Cl}_2$.
Explanation:
: The solution of bromine $\left(\mathrm{Br}_2\right)$ in carbon tetrachloride $\left(\mathrm{CCl}_4\right)$ as solvent is used to test for unsaturation in alkene, because alkene will turn brown bromine water colourless as the bromine reacts with the carbon-carbon double bond.
COMEDK 2018
Hydrocarbons
230341
Which one of the following reactions yield 2Ebutene as the major product?
: At low temperature, when alkynes are reacted with $\mathrm{Li}$ or $\mathrm{Na}$ metal in $\mathrm{NH}_3$ then anti addition of hydrogen atoms take place and E product is obtained.
AP-EAMCET (Medical)
Hydrocarbons
230345
The reaction \(\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \xrightarrow[300^{\circ} \mathrm{C}]{\mathrm{Ni}} \mathrm{CH}_3-\mathrm{CH}_3\)
1 Wurtz reaction
2 Kolbe reaction
3 Sabatier - Sender's reaction
4 Dow's reaction
Explanation:
: $\mathrm{CH}_2=\mathrm{CH}_2+\mathrm{H}_2 \underset{\mathrm{Ni}^{\circ} \mathrm{C}}{\mathrm{N}} \mathrm{CH}_3-\mathrm{CH}_3$ Sabatier-Sender's reaction is the reaction in which preparation of ethane is done by the catalytic hydrogenation of ethene. This reduction is carried out in the presence of catalyst like nickel.
Shift-I]**
Hydrocarbons
230347
The major product of the following reaction is: $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{CH}_2 \underset{\text { Rhacatalyst }}{\stackrel{\text { H, } / \mathrm{CO}}{\longrightarrow}}$
: Reaction of alkene with $\mathrm{H}_2 / \mathrm{CO}$ in the presence of Rhodium as catalyst is given below:- \(\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { Rh catalyst }]{\mathrm{H}_2 / \mathrm{CO}} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CHO}\)