01. Alkenes
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Hydrocarbons

230476 n-propyl bromide on treating with alcoholic KOH produces

1 propane
2 propene
3 propyne
4 propanol
2008]**
Hydrocarbons

230477 Peroxide effect is observed with the addition of $\mathrm{HBr}$ but not with the addition of HI to unsymmetrical alkene because

1 $\mathrm{H}-\mathrm{I}$ bond is stronger that $\mathrm{H}-\mathrm{Br}$ and is not cleaved by the free radical
2 $\mathrm{H}-\mathrm{I}$ bond is weaker than $\mathrm{H}-\mathrm{Br}$ bond so that Iodine free radicals combine to form iodine molecules
3 Bond strength of $\mathrm{HI}$ and $\mathrm{HBr}$ are same but free radicals are formed in $\mathrm{HBr}$
4 All of these
Kerala-CEE-29.08.2021]
Hydrocarbons

230479 Pick out the correct statements from the following and choose the correct answer from the codes given below
1.Hexa-1, 5-diene is a conjugated diene
2.Prop-1, 2-diene is conjugated diene
3.Hexa-1, 3-diene is a conjugated diene
4.Buta-1, 3 diene is an isolated diene
5.Prop-1, 2 diene is a cumulative diene

1 1,2
2 2,3
3 4,5
4 2,5
5 3,5
Kerala-CEE-2009]
Hydrocarbons

230487 When HBr adds on hex-1-ene in the presence of benzoyl peroxide, the product is

1 2-bromohexane
2 2,3-dibromohexane
3 1,2-dibromohexane
4 2, 4-dibromohexane
5 1-bromohexane
Kerala-CEE-2012
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Hydrocarbons

230476 n-propyl bromide on treating with alcoholic KOH produces

1 propane
2 propene
3 propyne
4 propanol
2008]**
Hydrocarbons

230477 Peroxide effect is observed with the addition of $\mathrm{HBr}$ but not with the addition of HI to unsymmetrical alkene because

1 $\mathrm{H}-\mathrm{I}$ bond is stronger that $\mathrm{H}-\mathrm{Br}$ and is not cleaved by the free radical
2 $\mathrm{H}-\mathrm{I}$ bond is weaker than $\mathrm{H}-\mathrm{Br}$ bond so that Iodine free radicals combine to form iodine molecules
3 Bond strength of $\mathrm{HI}$ and $\mathrm{HBr}$ are same but free radicals are formed in $\mathrm{HBr}$
4 All of these
Kerala-CEE-29.08.2021]
Hydrocarbons

230479 Pick out the correct statements from the following and choose the correct answer from the codes given below
1.Hexa-1, 5-diene is a conjugated diene
2.Prop-1, 2-diene is conjugated diene
3.Hexa-1, 3-diene is a conjugated diene
4.Buta-1, 3 diene is an isolated diene
5.Prop-1, 2 diene is a cumulative diene

1 1,2
2 2,3
3 4,5
4 2,5
5 3,5
Kerala-CEE-2009]
Hydrocarbons

230487 When HBr adds on hex-1-ene in the presence of benzoyl peroxide, the product is

1 2-bromohexane
2 2,3-dibromohexane
3 1,2-dibromohexane
4 2, 4-dibromohexane
5 1-bromohexane
Kerala-CEE-2012
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Hydrocarbons

230476 n-propyl bromide on treating with alcoholic KOH produces

1 propane
2 propene
3 propyne
4 propanol
2008]**
Hydrocarbons

230477 Peroxide effect is observed with the addition of $\mathrm{HBr}$ but not with the addition of HI to unsymmetrical alkene because

1 $\mathrm{H}-\mathrm{I}$ bond is stronger that $\mathrm{H}-\mathrm{Br}$ and is not cleaved by the free radical
2 $\mathrm{H}-\mathrm{I}$ bond is weaker than $\mathrm{H}-\mathrm{Br}$ bond so that Iodine free radicals combine to form iodine molecules
3 Bond strength of $\mathrm{HI}$ and $\mathrm{HBr}$ are same but free radicals are formed in $\mathrm{HBr}$
4 All of these
Kerala-CEE-29.08.2021]
Hydrocarbons

230479 Pick out the correct statements from the following and choose the correct answer from the codes given below
1.Hexa-1, 5-diene is a conjugated diene
2.Prop-1, 2-diene is conjugated diene
3.Hexa-1, 3-diene is a conjugated diene
4.Buta-1, 3 diene is an isolated diene
5.Prop-1, 2 diene is a cumulative diene

1 1,2
2 2,3
3 4,5
4 2,5
5 3,5
Kerala-CEE-2009]
Hydrocarbons

230487 When HBr adds on hex-1-ene in the presence of benzoyl peroxide, the product is

1 2-bromohexane
2 2,3-dibromohexane
3 1,2-dibromohexane
4 2, 4-dibromohexane
5 1-bromohexane
Kerala-CEE-2012
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Hydrocarbons

230476 n-propyl bromide on treating with alcoholic KOH produces

1 propane
2 propene
3 propyne
4 propanol
2008]**
Hydrocarbons

230477 Peroxide effect is observed with the addition of $\mathrm{HBr}$ but not with the addition of HI to unsymmetrical alkene because

1 $\mathrm{H}-\mathrm{I}$ bond is stronger that $\mathrm{H}-\mathrm{Br}$ and is not cleaved by the free radical
2 $\mathrm{H}-\mathrm{I}$ bond is weaker than $\mathrm{H}-\mathrm{Br}$ bond so that Iodine free radicals combine to form iodine molecules
3 Bond strength of $\mathrm{HI}$ and $\mathrm{HBr}$ are same but free radicals are formed in $\mathrm{HBr}$
4 All of these
Kerala-CEE-29.08.2021]
Hydrocarbons

230479 Pick out the correct statements from the following and choose the correct answer from the codes given below
1.Hexa-1, 5-diene is a conjugated diene
2.Prop-1, 2-diene is conjugated diene
3.Hexa-1, 3-diene is a conjugated diene
4.Buta-1, 3 diene is an isolated diene
5.Prop-1, 2 diene is a cumulative diene

1 1,2
2 2,3
3 4,5
4 2,5
5 3,5
Kerala-CEE-2009]
Hydrocarbons

230487 When HBr adds on hex-1-ene in the presence of benzoyl peroxide, the product is

1 2-bromohexane
2 2,3-dibromohexane
3 1,2-dibromohexane
4 2, 4-dibromohexane
5 1-bromohexane
Kerala-CEE-2012
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