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The major product of the following reaction is :
Option: 1

Option: 2

Option: 3
Option: 4

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Posted by

vishal kumar

1-methyl ethylene oxide when treated with an excess of HBr produces:
Option: 1
Option: 2
Option: 3
Option: 4

The given reaction occurs as

Therefore, Option(3) is correct.

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Posted by

Kuldeep Maurya

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In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is _____. $A\xrightarrow[Cu \; tu\; be]{Red\; hot}B\xrightarrow[Anhydrous\; AlCl_{3}]{CH_{3}Cl(I.eq.)}C$ (A is a lowest molecular weight alkyne )

Number of atoms in one plane = 13.

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Posted by

Kuldeep Maurya

Dihydrogen of high purity (> 99.95%) is obtained through :
Option: 1 the reaction of Zn with dilute HCl
Option: 2 the electrolysis of acidified water using Pt electrodes.
Option: 3 the electrolysis of brine solution.
Option: 4 the electrolysis of warm Ba(OH)₂ solution using Ni electrodes.

High purity (>99.95%) dihydrogen is obtained by electrolysing warm aqueous barium hydroxide solution between nickel electrodes.

Therefore, the correct option is (4).

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Posted by

Kuldeep Maurya

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Which of the following compounds produces an optically inactive compound on hydrogenation -
Option: 1
Option: 2
Option: 3
Option: 4

The reaction occurs as follows:

Thus, after hydrogenation, there will be no chiral centre.

Therefore, Option(4) is correct.

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Posted by

Kuldeep Maurya

Considering the above chemical reaction, identify the product "X":
Option: 1
Option: 2
Option: 3
Option: 4

The reaction will be -

Therefore, the Correct option is (3).

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Posted by

Kuldeep Maurya

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Among the following, the aromatic compounds are : Choose the correct answer from the following options:

Option: 1 (A), (B) and (C) only
Option: 2 (B), (C) and (D) only
Option: 3 (A) and (B) only
Option: 4 (B) and (C) only

(A) Non-Aromatic

(B) Aromatic - $6 \pi \text { electron }$

(C) Aromatic - $6 \pi \text { electron }$

(D) Anti-Aromatic - $4 \pi \text { electron }$

The aromatic compounds are (B) and (C) only.

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Posted by

Kuldeep Maurya

The products "A" and "B" formed in above reactions are :
Option: 1
Option: 2
Option: 3
Option: 4

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Posted by

Kuldeep Maurya

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Identify the reagent(s) 'A' and condition(s) for the reaction
Option: 1 A = Cl₂ ; dark , Anhydrous AlCl₃
Option: 2 A = Cl₂ ; UV light
Option: 3 A = HCl, Anhydrous AlCl₃
Option: 4 A= HCl , ZnCl₂

For substitution at the allylic position in the given compound, the reagent used is Cl₂ /UV light. The reaction is free radical halogenation.

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Posted by

Kuldeep Maurya

The number of sigma $(\sigma)$ and pi $(\pi)$ bonds in pent-2-en-4-yne is:
Option 1)
10 $\sigma$ bonds and 3 $\pi$ bonds
Option 2)
8 $\sigma$ bonds and 5 $\pi$ bonds
Option 3)
11 $\sigma$ bonds and 2 $\pi$ bonds
Option 4)
13 $\sigma$ bonds and no $\pi$ bonds

option (1)

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Posted by

Abinaya

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