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Question Bank No: 7

1. The bond that determines the secondary structure of a protein is

a)		Co-ordinate
b)		Covalent
c)		Hydrogen
d)		Ionic

2. Which of the following is not present in RNA?

a)		uracil
b)		thymine
c)		ribose
d)		phosphate

3. Which of the following is an example of zwitter ion?

a)		urea
b)		glycine hydrochloride
c)		ammonium acetate
d)		$α$ - alanine

4. Oxytocin is

a)		an antibody
b)		a hormone
c)		an enzyme
d)		none of these

5. Which Amino acid has no assymmetric carbon atom?

a)		Histidine
b)		Glycine
c)		$α$ - Alanine
d)		Threonin

6. Molish's test is answered by

a)		all carbohydrates
b)		sucrose
c)		fructose
d)		glucose

7. Lipids are

a)		Nucleic acids occuring in plants
b)		Proteins occuring in animals
c)		Carbohydrates occuring in plants
d)		Fats of natural origin

8. Which of the following gives maximum energy in metabolic process?

a)		Protein
b)		Vitamins
c)		Lipids
d)		Carbohydrates

9. Which of the following is not a sex hormone?

a)		Testosterone
b)		Estrone
c)		Estradiol
d)		Cortisone

10. Indigo belongs to

a)		Vat dyes
b)		Mordant dyes
c)		Direct dyes
d)		Ingrain dyes

11. Which of the following is Aspirin?

a)		Methyl Salicylate
b)		Acetyl Salicylic acid
c)		Phenyl Salicylate
d)		Salicylic acid

12. A broad spectrum antibiotic is

a)		paracetamol
b)		penicillin
c)		Aspirin
d)		Chloramphenicol

13. An ester used as medicine is

a)		ethyl acetate
b)		methyl acetate
c)		methyl salicylate
d)		ethyl benzoate

14. BOD is connected with

a)		organic matter
b)		microbes
c)		organic matter and microbes
d)		none of the above

15. Mottling of teeth is due to presence of an element in drinking water. The element is

a)		Mercury
b)		Fluorine
c)		Boron
d)		Chlorine

16. Which of the following IUPAC names is correct?

a)		2-methyl-3-ethylpentane
b)		3-ethyl-2-methylpentane
c)		2-ethyl-3-methylpentane
d)		3-methyl-2-ethylpentane

17. Which of the following is an optically active compound?

a)		1-butanol
b)		1-propanol
c)		2-chlorobutane
d)		4-hydroxyheptane

18. How many structural isomers are could be obtained from $C_{6} H_{14}$ ?

a)		4
b)		5
c)		6
d)		7

19. The most stable conformation of n-butane is

a)		skew boat
b)		Eclipsed
c)		Gauche
d)		staggered-anti

20. The number of optical isomers of the compound ${CH}_{3} CHBrCHBrCOOH$ is

a)		0
b)		1
c)		3
d)		4

21. Optically active isomers but not mirror images are called

a)		Enantiomers
b)		Mesomers
c)		Tautomers
d)		Diastereoisomers

22. What is the order of stability for I. 1-butene; II. cis- 2-butene; III. trans-2-butene

a)		I < II < III
b)		I > II > III
c)		III > I > II
d)		I > II < III

23. R and S pairs of enantiomers differ from one another in

a)		optical rotation of polarised light
b)		solubility in racemic mixture
c)		reaction with racemic mixture
d)		none of these

24. ${CH}_{3} {CH}_{2} {CH}_{2} OH$ and ${CH}_{3} {CH}_{2} {OCH}_{3}$ are

a)		position isomers
b)		chain isomers
c)		geometrical isomers
d)		functional isomers

25. How many carbon atoms in the molecule $HOOC - (CHOH)_{2} - COOH$ are asymmetric?

a)		1
b)		2
c)		3
d)		none of these

26. Which of the following does not show geometrical isomerism?

a)		1,2-dichloro-1 pentene
b)		1,3-dichloro-1 pentene
c)		1,1-dichloro-1 pentene
d)		1,4-dichloro-2 pentene

27. Electrophilic reagents are

a)		electron pair donors
b)		Lewis acids
c)		odd electron molecules
d)		none of the above

28. Which of the following contains 3 pairs of electrons in the valence shell?

a)		carbocations
b)		carbanions
c)		free radicals
d)		none

29. The most stable cabonium ion is

a)		methyl carbonium ion
b)		primary carbonium ion
c)		secondary carbonium ion
d)		tertiary carbonium ion

30. The homolytic fission of a hydrocarbon results in the formation of

a)		carbonium ion
b)		free radicals
c)		carbanions
d)		carbenes

31. The most stable free radical among the following is

a)		$C_{6} H_{5} {CH}_{2} {\dot{C} H}_{2}$
b)		$C_{6} H_{5} \dot{C} {HCH}_{3}$
c)		${CH}_{3} \dot{C} H_{2}$
d)		${CH}_{3} \dot{C} {HCH}_{3}$

32. Electrophile in the case of chlorination of Benzene in the presence of ${FeCl}_{3}$ is

a)		${Cl}^{+}$
b)		${Cl}^{-}$
c)		Cl
d)		${FeCl}_{3}$

33. Which of the following is correct regarding the $- I$ effect of the substituents?

a)		$- {NR}_{2} < - OR < - F$
b)		$- {NR}_{2} > - OR < - F$
c)		$- {NR}_{2} < - OR > - F$
d)		$- {NR}_{2} > - OR > - F$

34. Which of the following behave both as a nucleophile and as an electrophile?

a)		${CH}_{3} - C \equiv N$
b)		${C H}_{3} OH$
c)		${CH}_{2} = CH - {CH}_{3}$
d)		${CH}_{3} - {NH}_{2}$

35. The addition of HCN to a carbonyl compound is an example of

a)		nucleophilic substitution
b)		electrophilic addition
c)		nucleophilic addition
d)		electrophilic substitution

36. Acetaldehyde is the rearrangement product of

a)		methyl alcohol
b)		allyl alcohol
c)		vinyl alcohol
d)		all are correct

37. The reaction $({CH}_{3})_{3} CBr \overset{H_{2} O}{} ({CH}_{3})_{3} C - OH$ is

a)		elimination reaction
b)		substitution reaction
c)		free radical reaction
d)		displacement reaction