Optical Activity

Q.

Which of the following biphenyls is optically active?

1. 

2. 

3. 

4. 

Q.

Write structures of different isomers corresponding to the molecular formula,

C₃H₉N. Write IUPAC names of the isomers which will liberate nitrogen gas on

treatment with nitrous acid.

Q.

The following compounds are given to you:
2- Bromopentane, 2- Bromo - 2 methyl butane, 1- Bromopentane.
(a) Write the compound which is most reactive towards SN2 reaction.
(b) Write the compound which is optically active.
(c) Write the compound which is most reactive towards β- elimination reaction.

Q.

Partial hydrolysis of XeF₆ yields:

1. Xenon tetrafluoride

2. Xenon oxyfluoride

3. Xenon trioxide

4. Xenon dioxydifluoride

Q. Most effective ion for the coagulation of $A{s}_2{S}_3$ sol is

1. $A{l}^{3+}$
2. $M{g}^{2+}$
3. $C{l}^{-}$
4. $S{O}_4^{2-}$

Q.

How many constitutional isomers are there for ${\mathrm{C}}_6{\mathrm{H}}_{12}$?

Q. Which of the following compounds has the highest boiling point ?

1. $C_2{H}_{5}OH$
2. $C{H}_{3}COOH$
3. $C{H}_{3}COC{H}_3$
4. $HCOOC{H}_3$

Q.

Which form of sulphur shows paramagnetic behaviour?

Q. Identify the trans isomer of $\left[Pt\right(N{H}_3{)}_{2}C{l}_2]$ from the following

1. 
2. 
3. 
4. 

Q. The hybridization and magnetic nature of ${\left[Mn{\left(CN\right)}_6\right]}^{4-}$ and ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ , respectively are

1. $s{p}^3{d}^2$ and diamagnetic
2. $d^{2}s{p}^3$ and paramagnetic
3. $d^{2}s{p}^3$ and diamagnetic
4. $s{p}^3{d}^2$ and paramagnetic

Q.

Draw the structures of optical isomers of:

(i) [Cr(C₂O₄)₃]³⁻

(ii) [PtCl₂(en)₂]²⁺

(iii) [Cr(NH₃)₂Cl₂(en)]⁺

Q.

Identify the optically active compounds from the following
(a) $\left[Co\right(en{)}_3{]}^{3+}$
(b) $trans-\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$
(c) $cis-\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$
(d) $\left[Cr\right(N{H}_3{)}_{5}Cl]$

Q. Assertion: Aromatic $1^{\circ }$ amines can be prepared by Gabriel Phthalimide Synthesis.

Reason: Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.

1. Assertion is correct statement but reason is wrong statement.
2. Assertion is wrong statement but reason is correct statement.
3. Both assertion and reason are wrong.
4. Both assertion and reason are correct statements but reason is not the correct explanation of assertion.
5. Both assertion and reason are correct statements and reason is correct explanation of assertion.

Q.

Drugs which helps to reduce anxiety and brings about calmness are known as:

1. Antibiotics

2. Antihistamines

3. Analgesics

4. Tranquilisers

Q. Which of the following compound(s) is/are antacid?

1. Phenelzine
2. Ranitidine
3. Sodium hydrogencarbonate
4. Cimetidine

Q.

Number of optically active isomer of tartaric acid $CH\left(OH\right)COOH|CH\left(OH\right)COOH$

is

1. 2

2. 3

3. 4

4. 5

Q. Choose the correct option(s):
Here
a, b are monodentate ligands
AB is an unsymmetrical bidentate ligand

1. $Co(gly{)}_3$ does not have any geometrical isomers.
2. $Co(gly{)}_3$ has 4 geometrical isomers.
3. $\left[M\right(AB{)}_2{a}_2{b}_2{]}^{n\pm }$ has 4 geometrical isomers.
4. None of the above

Q. Which of the following drug has analgesics as well as antipyretic properties?

1. Aspirin
2. Tetracycline
3. Equanil
4. Dimetane

Q. 42 Give reason- 1. Only optically active haloalkanes undergo SN1 reaction. 2. Methyl chloride forms methyl cyanide with KCN but form methyl isocyanide with AgCN

Q. The property by virtue of which a compound can rotate the plane polarised light is known as

1. Polarization
2. Photolysis
3. Phosphorescence
4. Optical activity

Q.
Which among the above compund/s does/do not form Silver mirror when treated with Tollen's reagent ?

1. Only (II)
2. (I), (III) and (IV) only
3. (III) and (IV) only
4. Only (IV)

Q. For an $S_{N}2$ reaction of

the most effective nucleophile will be:

1. $Me{O}^{-}$
2. $M{e}_{3}C{O}^{-}$
3. $M{e}_{2}CH{O}^{-}$
4. $MeC{H}_2{O}^{-}$
   

Q. Hydrogen bonding is responsible for:

1. Higher boiling point of water in comparison to $H_{2}S$
2. Double stranded structure of DNA
3. Lower density of solid ice at $0{}^{\circ }\text{C}$ in comparison to water
4. All of the above

Q. Why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it, is diamagnetic?

Q.

Is 2-Chlorobutane optically active?

Q. Which of the following drugs is not classified in the criteria based on the pharmacological effect?

1. Antihistamines
2. Antiseptics
3. Analgesics
4. Antipyretics

Q. Which of the following complex is optically inactive?

1. $\left[Pd\right(en{)}_2\left(C{l}_2\right]$
2. $\left[RhCl\right(CO\left)\right(PP{h}_3\left)\right(N{H}_3\left)\right]$
   
3. $\left[Fe\right(en{)}_{2}C{l}_2]$
4. $\left[Fe\right(C_2{O}_4{)}_3{]}^{3-}$

Q. Which hononuclear diatomic molecule has the highest bond dissociation enthalpy?

Q. Which of the following is optically inactive?

1. 
2. 
3. 
4. 

Q. Find out number of dimerised products obtained by the following reaction.