Organic Reactions given in NCERT textbook Class 11 | Chemistry | Chapter 13 | Hydrocarbons : MCQs Snap

 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

3-Hexyne can be converted to trans-3-Hexene by the action of:

1. $H_2$ - Pd/ ${\mathrm{BaSO}}_4$                       

2. Li-Liq. ${\mathrm{NH}}_3$

3. $H_2$ - Pt $O_2$                               

4. ${\mathrm{NaBH}}_4$

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 Answer ▽ ✅Verified 

2. Li-Liq. ${\mathrm{NH}}_3$

Reference: From Alkyne to Alkene – Organic Reactions given in NCERT textbook Class 11 | Chemistry | Chapter 13 | Hydrocarbons : NCERT Snap (organisenotes.tk)

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 Question:  From NCERT  | NEET 2014   || [Difficult level:Easy] ||| 

.Which of the following organic compounds has same hybridisation as its combustion product -(CO2)?

1. Ethane

2. Ethyne

3. Ethene

4. Ethanol

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 Answer ▽ ✅Verified 

2. Ethyne

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 Question:  From NCERT  | NEET 2008   || [Difficult level:Easy] ||| 

.

$H_{3}C-\underset{|}{C}H-\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\to A{\mathrm{CH}}_3$

A (Predominantly) is

(1) ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{C}H-{\mathrm{CH}}_2-{\mathrm{CH}}_2\mathrm{Br}$

(2) ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{\overset{\underset{|}{\mathrm{Br}}}{C}}-{\mathrm{CH}}_2{\mathrm{CH}}_3$

(3) ${\mathrm{CH}}_3-\underset{\underset{\mathrm{Br}}{|}}{C}H-\underset{\underset{{\mathrm{CH}}_3}{|}}{C}H-{\mathrm{CH}}_3$

(4) ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{C}H-\underset{\underset{\mathrm{Br}}{|}}{C}H-{\mathrm{CH}}_3$

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 Answer ▽ ✅Verified 

(2) ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{\overset{\underset{|}{\mathrm{Br}}}{C}}-{\mathrm{CH}}_2{\mathrm{CH}}_3$

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 Question:  From NCERT  | NEET 2007   || [Difficult level:Easy] ||| 

.The order of decreasing reactivity towards an electrophilic reagent, for the following:-

(i) Benzene
(ii) Toluene
(iii) Chlorobenzene
(iv) Phenol

would be:-
(1) (i) > (ii) > (iii) > (iv)

(2) (ii) > (iv) > (i) > (iii)

(3) (iv) > (iii) > (ii) > (i)

(4) (iv) > (ii) > (i) > (iii)

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 Answer ▽ ✅Verified 

(4) (iv) > (ii) > (i) > (iii)

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.

.The number of isomeric sodium salt of acid that will be required to obtain neopentane is-

1. 3                                   

2. 1

3. 4                                                  

4. 6

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 Answer ▽ ✅Verified 

2. 1

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 Question:  From NCERT  | NEET 2016   || [Difficult level:Easy] ||| 

.Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?

1.  

2. 

3. 

4. 

.

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 Answer ▽ ✅Verified 

3.

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.

 

The major product in the above mentioned reaction is -

1. 

2. 

3. 

4. 

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 Answer ▽ ✅Verified 

4. 

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.1,2-dibromopropane on treatment with X moles of 

${\mathrm{NaNH}}_2$ followed by treatment with ethyl bromine gave a pent-2-yne, the value of X is -

1.  1

2.  2

3.  3

4.  4

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 Answer ▽ ✅Verified 

3.  3

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.

The main product A and B in the above mentioned reaction are respectively- 

 

1. 

2. 

3. 

4. 

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 Answer ▽ ✅Verified 

3. 

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.Elimination reaction of 2-Bromopentane to form pent-2-ene is-

(a) $\beta$-Elimination reaction

(b) Follows Zaitsev rule

(c) Dehydrohalogenation reaction

(d) Dehydration reaction

1. (a), (c), (d)

2. (b), (c), (d)

3. (a), (b), (d)

4. (a), (b), (c)

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 Answer ▽ ✅Verified 

4. (a), (b), (c)

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.When ethyl bromide and n-propyl bromide is allowed

to react with sodium, in ether, they form

(1) mixture of four alkanes

(2) mixture of three alkanes

(3) mixture of two alkanes

(4) single alkane

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 Answer ▽ ✅Verified 

(2) mixture of three alkanes

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.The major product of the following chemical reaction is:

1. 

2. 

3. 

4. 

.

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 Answer ▽ ✅Verified 

3. 

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 Question:  From NCERT  | NEET   || [Difficult level:Easy] ||| 

.

.Reactant A in the following reaction is-

A  + NaOH $\underset{\Delta }{\overset{CaO}{\to }}$ CH3CH2CH3 + Na2CO3

1. Sodium ethanoate

2. Sodium propanoate

3. Sodium butanoate

4. Sodium methanoate

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 Answer ▽ ✅Verified 

3. Sodium butanoate