Racemic Mixture

Q.

A racemic mixture is formed by mixing two

Q. Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halide due to

1. The formation of less stable carbene
2. Resonance stabilisation
3. Longer carbon halogen bond
4. $s{p}^2$ -hybridised carbon bonded to halogen

Q. Aromatic aldehydes reduce Options: Tollens reagent Fehlings solution Benedicts solution All of these

Q. what is kuchervous reaction

Q.

The process of converting one enantiomers of an optically active compound into racemic mixture is called:

1. Inversion

2. Racemisation

3. Resolution

4. Epimerisation

Q. Increasing rate of $S_{N}1$ reaction for the following compounds is:

1. I < II < III < IV
2. II < I < III < IV
3. I < II < IV < III
4. II < I < IV < III

Q.

Assertion: Racemic mixture is optically inactive.

Reason: Racemic mixture is a mixture of meso compounds.

1. Both Assertion and Reason are false.

2. Assertion is true, but Reason is false.

3. Both Assertion and Reason are true. The reason is the correct explanation of Assertion.

4. Both Assertion and Reason are true. The reason is not the correct explanation of Assertion.

Q. Which of the following reactions results in the production of a racemic mixture of products?

1. 
2. 
3. 
4. All of these

Q. treatment of pent-2-ene with HI gives 2-iodopentane why?

Q. In [M(a)3(b)3] why mer-isomer do not show optical isomerism?

Q. Tertiary butyl halide on boiling with water gives tertiary butyl alcohol . The reaction follows

1. $SE$ mechanism
2. $S_{N}1$ mechanism
3. $S_{N}2$ mechanism
4. $E1$ mechanism

Q. Which of the following compound will not show $S_{N}1$ reaction?

1. 
2. 
3. 
4. 

Q. Write the structure of an isomer of compound $C_4{H}_{9}Br$, which is most reactive towards $S_{N}1$ reaction.

1. 
2. 
3. 
4. 

Q. The ether which is not cleaved by HI even at 525 K Options: C6H5OCH3 C6H5OC3H7 CH3–O–CH3

Q. First order kinetics, derive integral rate equation for optically active substance when optical rotation angles are given (all steps)

Q. A pair of diastereomers that differ only in the configuration about a single carbon atom are called:

1. Epimers
2. Conformers
3. Anomers
4. Enantiomers

Q. An aryl halide gives nucleophilic substitution reaction when:

1. Electron withdrawing group is present at ortho or para from halogen.
2. Electron donating group is present at ortho or para from halogen.
3. No group is attached to it.
4. None of the above.

Q. 19 What is the difference between first order and second order reactions ??

Q. Reaction of styrene with dilute h2so4 gives major product

Q. Identify 'X' in the following sequence of reaction:

1. Benzoic acid
2. Phenyl acetic acid
3. Benzyl alcohol
4. Benzamide

Q. Give reasons:
''The presence of nitro group $(-N{O}_2)$ at ortho/para positions increase the reactivity of haloarenes towards nucleophilic substitution reaction''.

Q. Which of the following will give nucleophilic substitution reaction?

1. $R-Br$
2. $R-N_3$
3. $R-\stackrel{+}{O}{H}_2$
4. All of the above

Q. Define 'Racemization'.

Q. (i) Which alkyl halide from the following pair is chiral and undergoes faster $S_{N}2$ reaction?
(ii) Out of $S_{N}1$ and $S_{N}2$, which reaction occurs with
(a) inversion of configuration?
(b) racemisation?

Q. Aldol condensation??

Q. Racemic mixture are optically inactive. Give reason.

Q. What is a racemic mixture ? Give an example.

Q. What is racemic mixture?

Q. How many more coordination isomers are possiblebof the compound [Cu(NH3)4][PtCl4]

Q. Predict the major product of the given reaction

1. 
2. 
3. 
4.