Optical Isomerism in Octahedral Coordination of Bidentate Ligands

Q. Which of the following has an optical isomer?

1. $\left[Co\right(H_{2}O{)}_4\left(en\right){]}^{3+}$
2. $\left[Co\right(en{)}_2(N{H}_3{)}_2{]}^{3+}$
3. $\left[Co\right(CN{)}_4{]}^{2-}$
4. $\left[Co\right(en\left)\right(N{H}_3{)}_2{]}^{2+}$

Q. Which of the following does not show optical isomerism?
(en = ethylenediamine)

1. $\left[Co\right(en{)}_3{]}^{3+}$
   
2. $\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$
   
3. $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$
   
4. $\left[Co\right(en\left)C{l}_2\right(N{H}_3{)}_2{]}^{+}$
   

Q. For the given complex $\left[CoC{l}_2\right(en\left)\right(N{H}_3{)}_2{]}^{+}$, the number of geometrical isomers and the number of optical isomers respectively are:

1. $2,2$
2. $2,0$
3. $2,4$
4. $0,2$

Q. The phenomenon of optical activity will be shown by:

1. 
2. 
3. 
4. All of the above

Q. Find the shortest distance between the tetrahedral voids in face centred cubic unit cell. [Given : The edge length of unit cell is ‘a’]

फलक केन्द्रित घनीय एकक कोष्ठिका में चतुष्फलकीय रिक्तियों के मध्य न्यूनतम दूरी ज्ञात कीजिए। [दिया गया है : एकक कोंष्ठका की कोर लम्बाई ‘a’ है]

1. $\frac{\sqrt{3}a}{2}$
2. $\frac{\sqrt{3}a}{4}$
3. $\frac{a}{2}$
4. $\frac{a}{4}$

Q.

The following complexex are given:
(1) $trans-\left[Co\right(N{H}_3{)}_{4}C{l}_2{]}^{+}$
(2) $cis-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$
(3) $trans-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$
(4) $[NiC{l}_4{]}^{2-}$
(5) $[Ti{F}_6{]}^{2-}$
(6) $[Co{F}_6{]}^{3-}$
Choose the correct code:

1. 1, 2 are optically active; 3 optically inactive

2. 2 is optically active; 1, 3 are optically inactive

3. 4, 5 are colored; 6 is colorless

4. 4 is colored; 5, 6 are colorless

Q. Which one of the following has an optical isomer?

1. $\left[Zn\right(en{)}_2{]}^{2+}$
2. $\left[Zn\right(en\left)\right(N{H}_3{)}_2{]}^{2+}$
3. $\left[Co\right(en{)}_3{]}^{3+}$
4. $\left[Co\right(H_{2}O{)}_4\left(en\right){]}^{3+}$

Q. Which one of the following is likely to show optical activity?

1. $Trans-\left[Co\right(N{H}_3{)}_{4}C{l}_2{]}^{+}$
   
   
2. $\left[Co\right(H_{2}O{)}_{5}Cl{]}^{2+}$
3. $Cis-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$
4. $Trans-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$

Q.

The following complexex are given:
(1) $trans-\left[Co\right(N{H}_3{)}_{4}C{l}_2{]}^{+}$
(2) $cis-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$
(3) $trans-\left[Co\right(N{H}_3{)}_2(en{)}_2{]}^{3+}$
(4) $[NiC{l}_4{]}^{2-}$
(5) $[Ti{F}_6{]}^{2-}$
(6) $[Co{F}_6{]}^{3-}$
Choose the correct code:

1. 1, 2 are optically active; 3 optically inactive

2. 2 is optically active; 1, 3 are optically inactive

3. 4, 5 are colored; 6 is colorless

4. 4 is colored; 5, 6 are colorless