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Question Bank No: 1

1. HBr reacts faster with

a)		propan-1-ol
b)		propan -2-ol
c)		2-Methyl propan-1-ol
d)		2-Methyl propan-2-ol

2. What amount of bromine will be required to convert 2g of phenol into 2,4,6- tribromophenol?

a)		4.00
b)		6.00
c)		10.22
d)		20.44

3. Grignard reagent on reaction with acetone forms

a)		Teritary alcohol
b)		Secondary alcohol
c)		Acetic acid
d)		Acetaldehyde

4. The interparticle forces in ethers are

a)		H-bonds
b)		dipole-dipole
c)		covalent bonds
d)		ion-dipole

5. RC $H_{2} C H_{2} OH$ can be converted into RC $H_{2} C H_{2} COOH$ by the sequence of reactions:

a)		PB $r_{3}, KCN, H_{3} O^{+}$
b)		PB $r_{3}, KCN, H_{2} / Pt$
c)		KCN, $H_{3} O^{+}$
d)		HCN, PB $r_{3}, H_{3} O^{+}$

6. Which of the following compounds does not react with metallic sodium?

a)		C $H_{3} CH (OH) C H_{3}$
b)		C $H_{3} - O - C H_{3}$
c)		C $H_{3}$ COOH
d)		$C_{2} H_{5} OH$

7. Which of the following reagent(s) cannot be used to distinguish between phenol and benzyl alcohol?

a)		NaOH
b)		NaHC $O_{3}$
c)		B $r_{2} / CC L_{4}$
d)		FeC $L_{3}$

8. Propene C $H_{3} - CH = {CH}_{2}$ can be converted to 1- propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion?

a)		Alkaline KMn $O_{4}$
b)		$B_{2} H_{6}$ and alkaline $H_{2} O_{2}$
c)		$O_{3} / Zn$ dust
d)		Os $O_{4} / C H_{4}, C L_{2}$

9. When glycerol is heated with KHS $O_{4},$ the product formed is

a)		Propane
b)		Propene
c)		Allene
d)		Acrolein

10. How many isomers are possible for an aromatic compound having molecular formula $C_{7} H_{8} O ?$

a)		3
b)		4
c)		5
d)		6

11. On heating ethylene glycol at 775K, the product obtained is

a)		Oxirane
b)		Acetaldehyde
c)		Glyceraldehyde
d)		Dioxane

12. During the fermentation of mollases the enzyme that converts glucose to alcohol is

a)		Maltase
b)		Invertase
c)		Zymase
d)		Oxidase

13. Best reagent for preparing an alkyl chloride from an alcohol is

a)		SOC $L_{2}$
b)		HCL
c)		PC $L_{3}$
d)		PC $L_{5}$

14. An alcohol produced during manufacture of soap is

a)		Ethanol
b)		Ethylene glycol
c)		Glycerol
d)		Methanol

15. Which of the following alcohols is least soluble in water?

a)		C $H_{3} OH$
b)		$C_{2} H_{5} OH$
c)		n- $C_{3} H_{7} OH$
d)		n- $C_{4} H_{9} CL$

16. How many isomeric primary alcohols are possible for C4H9OH?

a)		1
b)		2
c)		3
d)		4

17. Which of the following compounds is oxidised to prepare ethyl methyl ketone

a)		2-propanol
b)		1-butanol
c)		2-butanol
d)		tert-butyl alcohol

18. The compound which reacts fastest with Lucas reagent at room temperature is

a)		Butan-1-ol
b)		Butan-2-ol
c)		2-Methylpropan-1ol
d)		2-Methylpropan-2-ol

19. A compound of molecular formula $C_{3} H_{8} O$ on oxidation gives a compound of formula $C_{3} H_{8} O_{2}$ . The original compound is

a)		Primary alcohol
b)		Secondary alcohol
c)		Aldehyde
d)		Tertiary alcohol

20. Glycerol on heating with potassium bisulphate yields

a)		Acetone
b)		Glyceraldehyde
c)		Acrolein
d)		Propanol

21. When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is :

a)		Oxalic acid
b)		Glyoxal
c)		Formic acid
d)		Ethanol

22. Picric acid is

a)		2,4,6 - Trinitrotoluene
b)		2,4,6 - Tribromoethanol
c)		2,4,6 - Trinitrophenol
d)		Para - Nitrophenol

23. Phenols are more acidic than alcohols because

a)		Phenoxide ion is stablised by resonance
b)		Phenols are more soluble in polar solvents
c)		Phenoxide ions do not exhibit resonance
d)		Alcohols donot lose H atoms at all

24. Which of the following is not true in case of reaction with heated copper at $300^{0} C$ ?

a)		Phenol $\to$ Benzyl alcohol
b)		Primary alcohol $\to$ Aldehyde
c)		Secondary alcohol $\to$ Ketone
d)		Tertiary alcohol $\to$ Olefin

25. Reaction of alcoholphenol-q18 with RMgX followed by hydrolysis will lead to produce

a)		RCHOHR
b)		RCHOHC $H_{3}$
c)		$R_{2} CHC H_{2} OH$
d)		RC $H_{2} C H_{2} OH$

26. An organic compound (a) reacts with sodium metal and forms(b). On heating with conc. $H_{2} {SO}_{4}$ (a) gives diethyl ether.(a) and (b) are respectively

a)		$C_{2} H_{5} OH$ and $C_{2} H_{5} ONa$
b)		$C_{3} H_{7} OH$ and ${CH}_{3} H_{5} ONa$
c)		${CH}_{3} OH$ and ${CH}_{3} ONa$
d)		$C_{4} H_{9} OH$ and $C_{4} H_{9} ONa$

27. An organic compound 'X' on treatment with acidified $K_{2} {CrO}_{7}$ gives a compound 'Y' which reacts with $1_{2}$ and sodium carbonate to form Triodomethane. The compound 'X' is

a)		${CH}_{3} OH$
b)		${CH}_{3} CH O$
c)		${CH}_{3} CH (OH) {CH}_{3}$
d)		${CH}_{3} COC H_{3}$

28. R - OH + HX $\to RX + H_{2} O$
In the above reaction , the reactivity of alcohol is

a)		Tertiary $>$ secondary $>$ primary
b)		Tertiary $<$ secondary $<$ primary
c)		Tertiary $>$ primary $>$ secondary
d)		secondary $>$ primary $>$ Tertiary

29. In glycerine

a)		One primary -OH group is present only
b)		One tertiary - OH group is present
c)		Two secondary - OH groups are present
d)		One secondary - OH group is present

30. R- ${CH}_{2} - {CH}_{2} - OH$ can be converted into ${RCH}_{2} {CH}_{2} COOH$ by the following sequence of steps.

a)		${PBr}_{3}, KCN, H_{3} O^{+}$
b)		${PBr}_{3}, KCN, H_{2} / Pt$
c)		$KCN, H_{3} O^{+}$
d)		$HCN, {PBr}_{3}, H_{3} O^{+}$

31. Isopropyl alcohol on oxidation gives

a)		Acetone
b)		Ether
c)		Ethylene
d)		Acetaldehyde

32. Which of the following reagent will convert Propanoic acid to Propan -1-ol?

a)		KMn $O_{4}$
b)		Mn $O_{2}$
c)		${Cr}_{2} O_{3}$
d)		LiAl $H_{4}$

33. Glycol is added to aviation petrol because

a)		It prevents freezing of petrol
b)		It minimises the loss of petrol
c)		It increases the efficiency of fuel
d)		It prevents the engine from heating up

34. Electrophilic substitution in phenol generally occurs at

a)		o - and p- positions
b)		metapositions
c)		only at ortbo positions
d)		only at para position

35. Which of the following reagent will convert glycerol to acrolein?

a)		$P_{2} O_{5}$
b)		Conc $H_{2} S O_{4}$
c)		${KHSO}_{4}$
d)		All the three

36. Alcoholic beverages are made of

a)		Ethanol
b)		Acetic acid
c)		Formic acid
d)		None of these

37. Baeyer's reagent is

a)		Alkaline ${KMnO}_{4}$
b)		Amm. ${AgNO}_{3}$
c)		Ammonical ${CuSO}_{4}$
d)		${CaSO}_{4} / Ca (OH)_{2}$

38. The strongest acid among the following aromatic compound is

a)		Ortho-nitrophenol
b)		Para - chlorophenol
c)		Para - nitrophenol
d)		Meta - nitrophenol

39. Identify Z in the series
$C_{3} H_{7} OH ⟶_{160^{O} - 180^{O}}^{Conc . H_{2} {SO}_{4}} X \overset{{Br}_{2}}{⟶}$ $Y \overset{excess of alc . KOH}{⟶} Z$

a)		${CH}_{3} - \underset{}{\underset{\underset{{NH}_{2}}{1}}{CH} - \underset{\underset{{NH}_{2}}{1}}{{CH}_{2}}}$
b)		${CH}_{3} - \underset{}{\underset{\underset{OH}{1}}{CH} - \underset{\underset{OH}{1}}{{CH}_{2}}}$
c)		${CH}_{3} - \underset{}{\underset{\underset{OH}{1}}{C} - C H_{2}}$
d)		${CH}_{3 -} C \equiv CH$

40. Which of the following is not a characteristic of alcohol?

a)		They are lighter than water
b)		Their boiling point rise fairly uniformly with rising molecular weight
c)		Lower members are insoluble in water and organic solvents but the solubility regularly increases with molecular mass
d)		Lower members have a pleasant smell and burning taste, higher members are colourless and tasteless

41. The enzyme which can catalyse the conversion of glucose to ethanol is

a)		Zymase
b)		Invertase
c)		Maltase
d)		Diastase

42. Glycerol can be obtained from

a)		Fats
b)		Propylene
c)		Both A & B
d)		None

43. A fruity smell is obtained by the reaction of ethanol with

a)		${PCl}_{5}$
b)		${CH}_{3} {COCH}_{3}$
c)		${CH}_{3} COOH$
d)		none of these

44. Which of the following is most acidic

a)		phenol
b)		benzyl alcohol
c)		m- chlorophenol
d)		cyclohexanol

45. Which of the following is the most suitable method for removing the traces of water from ethanol?

a)		Heating with Na metal
b)		Passing dry HCl through it
c)		Distilling it
d)		Reacting with Mg.

46. Which of the following has maximum hydrogen bonding?

a)		ethyl amine
b)		ammonia
c)		ethyl alcohol
d)		diethyl ether

47. Phenol gives ...........colour with neutral ${FeCl}_{3}$ solution

a)		violet
b)		green
c)		red
d)		blue

48. Glycerol, on heating with oxalic acid at $110^{\circ} C$ gives

a)		Ethanol
b)		Methanoic acid
c)		Ether
d)		Acetone

49. In the Libermann's nitroso reaction, sequential changes in the colour of phenol occurs as

a)		Brown or red $\to$ green $\to$ deep blue
b)		Red $\to$ deep blue $\to$ green
c)		Red $\to$ green $\to$ white
d)		White $\to$ red $\to$ green

50. When wine is put in air, it becomes sour due to

a)		Bacteria
b)		Oxidation of $C_{2} H_{5} OH$ into ${CH}_{3} COOH$
c)		virus
d)		Formic acid formation