Diastereomers

Q. Is there any specific formula to find the number of chain isomers of an organic compound?

Q. Among the following, the optically inactive compound is :

1. 
2. 
3. 
4. 

Q.

The optically active tartaric acid is named as $D-(+)$ tartaric acid because it has a positive

1. Optical rotation and derived from D-glucose

2. Opitcal rotation and is derived from D-(+) glyceraldehyde

3. PH is organic solvent

4. Optical rotation only when substituted by deuterium

Q.

Which Of The Following Complexes Will Show Optical Isomerism?

1. $\left[\mathrm{Cr}{\left(\mathrm{en}\right)}_3\right]{\mathrm{Cl}}_3$

2. $[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6{]}^{2+}$

3. $[\mathrm{Ni}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{2+}$

4. $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_3\mathrm{Br}\right]{\mathrm{NO}}_3$

Q.

Which one of the following is dibasic acid?

1. ${\mathrm{H}}_3{\mathrm{PO}}_4$

2. ${\mathrm{H}}_3{\mathrm{BO}}_3$

3. ${\mathrm{H}}_3{\mathrm{PO}}_3$

4. ${\mathrm{H}}_3{\mathrm{AsO}}_4$

Q. How many monochlorinated products (including stereoisomers) are possible of isohexane?

Q. Is there any formula to know how many isomers does any molecular formula has ?

Q.

How to identify diastereomers and enantiomers?

Q. Which of the following are diastereomers?

1. 
2. 
3. 
4. 

Q.

Which one of the following ethers on hydrolysis gives two different products that are successive members of homologous series?

Q. Diastereomers may or may not be chiral – True or False?

1. True
2. False

Q.

(i) Draw the structures of all isomeric alcohols of molecular formula C₅H₁₂O and give their IUPAC names.

(ii) Classify the isomers of alcohols in question 11.3 (i) as primary, secondary and tertiary alcohols.

Q. Compounds which are not enantiomers are diastereomers – True or False?

1. True
2. False

Q. Which of the following is/are diastereomer pair(s)?

1. 
2. 
3. 
4. 

Q.

When two isomers are mirror images of each other and rotates the plane of polarized light in opposite directions, it is a type of:

1. Ionisation isomerism

2. Structural isomerism

3. Optical isomerism

4. Linkage isomerism

Q. The total number of cyclic isomers possible for a hydrocarbon with the molecular formula $C_4{H}_6$ is

1. 2
2. 3
3. 4
4. 5

Q. Which of the following is correct relation with respect to isomerism?

1. are diastereomers
2. are metamers
3. are enantiomers
4. are pair of diastereomers

Q. 43.The Total number of monochloride obtained by chlorination of neohexane is (1) if excluding stereoisomer (2) including stereoisomer

Q. The number of stereoisomers possible for $H_{3}C-CH\left(OH\right)-CH\left(OH\right)-C{H}_3$ is :

1. 2
2. 6
3. 4
4. 1

Q.

The complex with spin-only magnetic moment of 4.9 B.M. is

1. $\left[Fe\right(CN{)}_6{]}^{3+}$
2. $\left[Fe\right(H_{2}O{)}_6{]}^{3+}$
3. $\left[Fe\right(CN{)}_6{]}^{4-}$
4. $\left[Fe\right(H_{2}O{)}_6{]}^{2+}$

Q. Meso compounds are optically ___.

Q.

Which of the following are diasteromers?

1. (I) and (III)

2. (II) and (IV)

3. (I) and (II)

4. None

Q. ( + ) lactic acid and (-) lactic acid represent:

1. Diastereomer
2. Enantiomer
3. Position isomer
4. Functional isomer

Q. Which structure(s) represent(s) diastereomer(s) of $I$?

1. $II,IV$
2. $II$
3. $III,V$
4. $II,III$

Q. How many structural and geometrical isomers are possible for dimethyl cyclohexane?

1. $3,6$
2. $4,6$
3. $6,4$
4. $3,3$

Q. What is the product when one equivalent of HBr is treated with but-1-en-3-yne? Give the mechanism too.

Q. Methylethylpropyl amine is optically inactive because
(i) It is not tetrahedral
(ii) Its molecule is superimposable on its mirror image
(iii) The enantiomers are rapidly interconverted
(iv) The nitrogen is ${sp}^2$ hybridized
Which of the above statement(s) is(are) true?

1. Only (i)
2. (i) and (iii)
3. Only (iii)
4. All the four

Q. A compound can be divided into two equal halves and contains even $n$ asymmetric carbon atoms. The number of stereo isomers is:

1. $2^n$
2. $2(n+1)$
3. $2^{n-1}+2^{(n/2-1)}$
4. $2^{(n/2-1)}$

Q. Why square planar complexes do not show optical activity?

Q. Diastereomers may or may not be chiral – True or False?

1. True
2. False