About Author

My photo
Professor & HoD Department of Pharmaceutical Chemistry, JSS College of Pharmacy, (Constituent College, JSS Academy of Higher Education &Research-Deemed to be University, Mysuru) Ooty-643 001, The Nilgiris, Tamilnadu,INDIA The author has about 23 years of teaching and research experience. The Author has more than 110 research publications in reputed National and International journals and has H-index 16 by scopus. He has also published 9 books. He is a recognized research guide for Ph.D in JSS Academy of Health Education and Research and He served as editorial member and reviewer in many reputed National and International journals. He is the winner in Drug Discovery Hackathon-2020 for Covid-19 Drug discovery organized by Govt of India and also received a Research grant of 14.35 lakhs in phase-II research. He is nominated as BOS member in various universities. He has organized many national and International seminar/ workshop/ Conferences etc sponsored by various funding agencies.

Search This Blog

Thursday, March 28, 2019

Pharm.D_POC_Alkanes & Alkenes_MCQ

Pharm.D_POC_Alkanes & Alkenes_MCQ

1.Which one of the following reactions can be used to prepare alkanes?
A) Williamson synthesis                                                                                                       
B) Friedel-crafts reaction 
C) Kolbe’s electrolysis                                                                                                             
D) All of these

2.Alkanes are ____ in water
A) Insoluble     
B) soluble
C) solvent     
D) None

3.Chlorination of alkanes is an example of________ reaction.
A) Radical     
B) Free radical 
C) elimination   
D) addition

4.Chloro ethane reacts with _____ to form diethyl ether.
A) NaOH    
B) H2SO4
C) C2H5ONa  
D) Na2S2O3

5.In methane the carbon is ________ hybridized.                                                           
A) Sp                                                                                                                                                   
b) Sp2                                                                                                                                                    
c) Sp3                                                                                                                                             
d) Sp or Sp2

6.In free radical addition, orientation is governed by ----- rule?
A) Markovnikov   
B) anti- Markovnikov
C) Saytzeff    
D) Elimination

7.What is the order of reactivity of halogenation of alkanes   
a) I>Br>Cl>F
b) F>Cl>Br>I
c) I>Cl>Br>F
d) F>Br>Cl>I

8.Which of the following reaction proceeds via free radicals initiated mechanism
a) Halogenation of alkane
b) Dehydrohalogenation of alkyl halide
c) Dehydration of alcohol 
d) Kobes reaction

9.If propane undergos chlorination what will be the major product
a) 1-Chloro propane
b) 2-Chloro propane
c) 3-Chloro propane 
d)4-Chloro propane 

10. Chlorination of methane reaction demands which of the following conditions 
a) Temperature 100°C
b) Temperature 50°C
c) UV Radiations 
d) IR Radiations 

11.What is the relative order of stability of free radical 
a) 1°>2°>3°
b) 3°>2°>1°
c) 1°>3°>2°
d) 2°>1°>3°

12.The stability of alkene is determined by       
A) Markonikov’s rule                                                                                                                      
B) Hund’s rule 
C) Saytzeff’s rule                                                                                                                               
D) Huckel’s rule

13.Alkenes show geometrical isomerism due to 
A) Asymmetry                                                                                                                                
B) Resonance   
C) Rotation around a single bond                                                                                            
D) Restricted rotation around a double bond.

14.Which of the following reaction type is characteristic of alkenes?
A) Nucleophilic addition                                                                                                              
B) Electrophilic addition 
C) Electrophilic substitution                                                                                                      
D) Nucleophilic substitution

15.What is the expected product formed from the reaction between 2-butene and Cl2?
A) 1-chlorobutane                                                                                                                          
B) 2-chlorobutane
C) 2,3-dichlorobutane                                                                                                                  
D) 2,2-dichlorobutane

16.Ethylene is a ________ molecule.
A) Polar       
B) Non polar  
C) Only A     
D) None

17.The old name of alkenes was
A) Paraffins    
B) Olefins 
C) acetylene    
D) None

18.The general formula for the alkenes is
A) CnH2n-2    
B) CnH2n
C) CnHn    
D) CnH2n+2

19.Markonikov's rule is applied when _______                                                                         
a) symmetrical alkenes react with unsymmetrical reagents                                            
b) unsymmetrical alkenes react with symmetrical reagent                                             
c) symmetrical alkenes react with symmetrical reagents                                                 
d) unymmetrical alkenes react with unsymmetrical reagents 

20.Karasch effect or peroxide effect takes place when the addition proceeds by _____                           a) Ionic mechanism                                                                                                                         
b) free radical mechanism                                                                                                            
c) ionic or free radical mechanism                                                                                             
d) formation of most stable carbonium ion

21.Dehydrogenation reactions involve use of ___________                                      
a) Aqueous KOH                                                                                                                              
b) Alcoholic KOH                                                                                                                             
c) C2H5OH + Na                                                                                                                                
d) Zinc dust

22.The least reactive alkyl halide towards SN1 reaction is
A) Primary       
B) Secondary  
C) Tertiary        
D) Quaternary

23.Which of the following is the substrate for dehydro halogenation 
a) Alcohol 
b) Alkane 
c) Alkyl halide 
d) Alkane nitrile

24. Carbocations are formed by 
a) Homolytic bond dissociation 
b) Heterolytic bond cleavage 
c) Pericyclic bond cleavage
d) Illusive bond cleavage

25.Which of the following undergos elimination reaction
a) Alkyne
b) Nitro alkane
c) Alkane nitrile
d) alkyl halide

26.Which of the following is a addition reaction 
a) Markonikovs reaction 
b) Halogenation of alkane
c) Acetylation 
d) Diazotisation

27.What is the relative order of stability of carbocations 
a) 1°>2°>3°
b) 3°>2°>1°
c) 1°>3°>2°
d) 2°>1°>3°

28.Which of the following  isotope  reduces rate of E2 reaction to the maximum   
a) Hydrogen
b) Duterium
c) Tritium 
d) Crypton 

29.Which halogenous acid participates in peroxide effect 
a) HCl
b) HBr 
c) HI
d) HF

30. Alkyl groups are 
a) Electron withdrawing in nature 
b) Electron donating in nature 
c) Neither electron donating nor withdrawing
d) Both withdrawing and donating 

No comments:

Organic Intermediates- Nitrenes