In the following reaction the catalyst used is: → C 6 H 6 + 3 H 2

Zn dust 4. Cr 2 O 3 and A l 2 O 3

R - CH 2 - CCl 2 - R → Reagent R - C ≡ C - R . The reagent is

KOH in C 2 H 5 OH 4. Zn in alcohol

→ NBS Products formed are

3. (B) and (C) only 4. (A), (B), (C) and ()

1. (A) and (B) only 2. (A) and () only

Chemistry - Hydrocarbons - Quiz-3

In the following reaction the catalyst used is:

$\to$ $C_{6} H_{6}$ + 3 $H_{2}$

0%

${Cr}_{2} O_{3}$ 2. $A l_{2} O_{3}$
0%
2
0%

Zn dust 4. ${Cr}_{2} O_{3}$ and $A l_{2} O_{3}$
0%
4

Silver acetylide when heated with HCl gives:

0%

$C_{2} H_{2}$
0%

$H_{2}$
0%

$C_{2} H_{4}$
0%

$C_{6} H_{6}$

$R - {CH}_{2} - {CCl}_{2} - R \overset{Reagent}{\to}$ $R - C \equiv C - R$ . The reagent is

0%

Na 2. HCl in $H_{2} O$
0%
2
0%

KOH in $C_{2} H_{5} OH$ 4. Zn in alcohol
0%
4

Which of these will not react with acetylene?

0%

NaOH 2. Amm. ${AgNO}_{3}$
0%
2
0%

Na 4. HCl
0%
4

The reaction,

$\overset{H_{2} {SO}_{4}}{\to}$ is the example of:

0%

sulphonation
0%

dehydration
0%

alkylation
0%

decomposition

2-bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is

0%

2-ethoxypentane
0%
pent-1-ene
0%
trans-pent-2-ene
0%
cis-pent-2-ene

RCOCl and ${AlCl}_{3}$ are used in the Friedel-Crafts reaction. The electrophile is:

0%

${Cl}^{+}$
0%

RCOCl
0%

$R \overset{+}{C}$ O
0%

$R^{+}$

Ozonolysis of 2,3-dimethylbut-1-ene followed by reduction with zinc and water gives

0%

methanoic acid and 3-methyl-2-butanone
0%

methanal and 3-methyl-2-butanone
0%

methanal and 2-methyl-3-butanone
0%

methanoic acid and 2-methyl-3-butanone

The product (s) obtained via oxymercuration-dermercuration of butyne would be

0%
0%
0%

+ ${CH}_{2} O$
0%
+ HCOOH

${CH}_{3} - CHCOOK | {CH}_{3} - CHCOOK$ $\overset{Electrolysis}{\to}$ A (Major)

The product "A" is -

The most stable alkene is

$\overset{1 eq . NBS}{\to}$ X $\overset{{PhO}^{-}}{\to}$ Y (major product)

The product Y is -

0%
1
0%
2
0%
3
0%
4

$\to_{Zn / AcOH}^{O_{3}}$ A
A is:

0%

3-keto butanol
0%

Butan-1,4-dial
0%

1-aldo-2-butanone
0%

2-keto butan-1,4-dial

A compound 'A'

1. Decolourises Baeyer's reagent

3. On ozonolysis gave one molecule of acetone and one of formaldehyde 'A' is

0%

Propylene 2. Ethylene
0%

On hydroxylation and futher oxidation with ${KMnO}_{4}$ gave formic acid and acetone
0%

n-butylene
0%
Isobutylene

${CH}_{3} Cl \overset{Na}{\to}$ Gas A

${CH}_{2} COONa - {CH}_{2} COONa$ $\to_{Electrolysis}^{Kolbe' s}$ Gas B

${Mg}_{2} C_{3} \overset{H_{2} O}{\to}$ Gas C

Gas (A+B+C) $\to_{{Cu}_{2} {Cl}_{2}}^{Ammoniacal}$

gas mixture $\to_{Alk . {KMnO}_{4}}^{Cold dil}$ Gas X

Gas X is-

0%

Gas A + Gas B
0%
Only Gas B
0%

Gas B + Gas C
0%
Only Gas A

The product obtained on heating n-heptane with ${Cr}_{2} O_{3} - {Al}_{2} O_{3}$ at $600 ° C$ is

0%

cyclohexane
0%
cyclohexene
0%

benzene
0%
toluene

The intermediate during the addition of HCl to propene in the presence of peroxide is

0%

${CH}_{3} \overset{*}{C} {HCH}_{2} Cl$
0%
${CH}_{3} \overset{+}{C} {HCH}_{3}$
0%
${CH}_{3} {CH}_{2} \overset{*}{{CH}_{2}}$
0%
${CH}_{3} {CH}_{2} \overset{+}{{CH}_{2}}$

Which reagent distinguish propyne and propene?

0%

Alkaline ${KMnO}_{4}$
0%

${Cu}_{2} {Cl}_{2}$ + ${NH}_{4} Cl$
0%

${Br}_{2}$ water
0%

${Cu}_{2} {Cl}_{2}$ + ${NH}_{4} OH$

$CH \equiv CH \overset{O_{3} / NaOH}{\to}$ X $\overset{Zn / {CH}_{3} COOH}{\to}$ Y
Y is:

0%
0%
${CH}_{3} {CH}_{2} OH$
0%

${CH}_{3} COOH$
0%
${CH}_{3} OH$

The alkene among the following that has the smallest heat of hydrogenation is-

0%

${CH}_{3} - CH = CH - {CH}_{3}$
0%

${({CH}_{3})}_{2} C = CH - {CH}_{3}$
0%

${CH}_{2} = CH - {CH}_{2} - {CH}_{3}$
0%

${CH}_{3} - CH = CH - CH {({CH}_{3})}_{2}$

Which of the following alkane will give the maximum number of isomers when monochloro substituted product is obtained

0%
0%
0%

${CH}_{4}$
0%

The correct order of relative rates of hydrogenation of alkenes is:

0%

Ethylene > propene > 2-butene > 2-methyl-2-butene
0%

2-methyl-2-butene > 2-butene > Propene > Ethylene
0%

2-butene > propene > ethylene > 2-methyl-2-butene
0%

Propene > 2-butene > ethylene > 2-methyl-2-butene

$\overset{NBS}{\to}$ Products formed are

0%

() (B)
0%

(C) (D)
0%

1. (A) and (B) only 2. (A) and () only
0%

3. (B) and (C) only 4. (A), (B), (C) and ()

An unsaturated hydrocarbon on complete hydrogenation gives 1-isopropyl-3 methylcyclohexane, after ozonolysis it gives one mole of formaldehyde, one mole of acetone and one mole of 2,4-Dioxohexanedial. The possible structure\s of the hydrocarbon may be

Which one of the following reactions is not possible?

0%

CH₃COONa + HCI → CH₃COOH + NaCI
0%

CH₃–SO₃H + → CH₃SONa +
0%

+ PhONa → PhOH +
0%

+ NaNH₂→ + NH₃

Observe the following sequence of reactions.

The product R is :

(1)
(2)
(3)
(4)

0%
1
0%
2
0%
3
0%
4

No . of products and No. of fractions are respectively

0%

6, 5
0%

6, 4
0%

5, 4
0%

6, 3

Consider the following reaction

1.
2.
3.
4.

0%
1
0%
2
0%
3
0%
4

In the following series of reactions the major products P and S are respectively.

$\overset{{Br}_{2} / hv}{\to} (P) \overset{t B u O^{⊝}}{\to} (Q) \to_{\underset{}{(i i) T h O_{2}, ∆ / (i i i) a l c . K O H}}^{(i) H O B r / H^{+}} (R) \to_{\underset{}{(i i) T h O_{2}, ∆ / (i i i) a l c . K O H, ∆}}^{(i) H O B r / H^{+}} (S)$