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The absolute configuration of is :
Option: 1 (2R, 3S)
Option: 2 (2S, 3R)
Option: 3 (2S, 3S)
Option: 4 (2R, 3R)
 

As we learnt ,

 

Chiral Carbon -

Those carbon on which four different groups are present.

- wherein

 

 

For C2 \rightarrow 

\Rightarrow This rotation suggests R but the least prior group is at horizontal position so the configuration is R.

For C3 \rightarrow 

\Rightarrow This rotation suggests S but the least prior group is at horizontal position so the configuration is S.

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Posted by

Ritika Jonwal

In the  following reaction sequence : The compound I is :
Option: 1

Option: 2 

Option: 3 

Option: 4 

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Posted by

vishal kumar

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The major product of the following reaction is
Option: 1

Option: 2 

Option: 3 

Option: 4 
 

As we have learned @4233

Reaction follows the path way

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Posted by

vishal kumar

Which of the following compounds will behave as a reducing sugar in an aqueous KOH solution ?
Option: 1

Option: 2

Option:3
              
Option:4   

Sugar that have an aldehyde, a ketone, a hemiacetal or a hemiketal or a hemiketal group is able to reduce an oxidising agent, These sugar are classified as reducing sugars.

Hemiacetal can be easily reduced by oxidising agent such as Tollen's reagent

Therefore, option(3) is correct.

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Posted by

vishal kumar

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 Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine ?  
Option: 1

Option: 2 
Option: 3

Option: 4 
 

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Posted by

vishal kumar

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


Option: 2

 


Option: 3


Option: 4
 

The given reaction sequence occurs as

Hence, the option number (3) is correct.

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Posted by

Ritika Jonwal

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Iodoform test is given by 
Option: 1 Pentan-2-one
Option: 2 Ethanoic acid
Option: 3 Pentan-3-one
Option: 4 Methoxymethane

Ask questions answer she saw a tiger

 

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Posted by

Diganta Bora

Read the given passage and answer the questions that follow : The substitution reaction of alkyl halide mainly occurs by S_{N}1 or S_{N}2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon halogen bond is responsible for these substitution reactions. The rate of S_{N}1reactions are governed by the stability of carbocation whereas for S_{N}2 reactions steric factor is the deciding factor. If the starting material is a chiral compound, we may end up with an inverted product or racemic mixture depending upon the type of mechanism followed by alkyl halide. Cleavage of ethers with HI is also governed by steric factor and stability of carbocation, which indicates that in organic chemistry, these two major factors help us in deciding the kind of product formed. Write the structures of the products formed when ethoxybenzene is treated with HI.

Products formed when ethoxybenzene is treated with HI are

C2H5I + C6H5OH

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Posted by

Safeer PP

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Iodoform test is not given by 
Option: 1 Hexan-2-one
Option: 2 Hexan-3-one 
Option: 3 Ethanol 
Option: 4 Ethanal

 Iodoform test is not given by Hexan-3-one, since it is not methyl ketone 

Hence option B is correct 

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Posted by

Safeer PP

The substitution reaction of alkyl halide mainly occurs by S_{N}1 or S_{N}2mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon halogen bond is responsible for these substitution reactions. The rate of S_{N}1reactions are governed by the stability of carbocation whereas for S_{N}2 reactions steric factor is the deciding factor. If the starting material is a chiral compound, we may end up with an inverted product or racemic mixture depending upon the type of mechanism followed by alkyl halide. Cleavage of ethers with HI is also governed by steric factor and stability of carbocation, which indicates that in organic chemistry, these two major factors help us in deciding the kind of product formed. Write the structures of the products formed when anisole is treated with HI.

CH3I + C6H5OH are the products formed when anisole is treated with HI.

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Posted by

Safeer PP

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