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Hydroxy Compounds and Ethers Model Question Paper 1

12th Standard EM

Reg.No. :
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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. In the reaction sequence, Ethane $\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow }$ ethan -1, 2 - diol . A and X respectively are

(a)

Chloroethane and NaOH

(b)

ethanol and H2SO4

(c)

2 – chloroethan -1-ol and NaHCO3

(d)

ethanol and H2O

2. Carbolic acid is

(a)

Phenol

(b)

Picri cacid

(c)

benzoic acid

(d)

phenylacetic acid

3. (CH3)3-C-CH(OH) CH3 $\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow }$X (major product)

(a)

(CH3)3 CCH = CH2

(b)

(CH3)2C = C (CH3)2

(c)

CH2= C(CH3)CH2-CH2- CH3

(d)

CH2= C (CH3) - CH2- CH2- CH3

4. Which among the following statement are correct with regard to alkyl halides?

(a)

Alkyl halides on heating with aq NaOH gives alcohols

(b)

10 alkyl halides proceed by SN2 mechanism

(c)

20 and 30 alkyl halides undergo substitution by SN1 mechanism

(d)

all the above

5. Which one of the following would not react with cone. HCI and anhy. ZnCl2 at room temperature?

(a)

(CH3)3COH

(b)

(CH3)2CHOH

(c)

${ CH }_{ 3 }-{ CH }_{ 2 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -OH$

(d)

CH3CH2CH2OH

6. 5 x 2 = 10
7. Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI

8. What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

9. Can we use nucelophiles such as NH3,CH3- for the Nucleophilic substitution of alcohols

10. Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

11. Explain why phenol does not undergo substitution of the -OH group like alcohol.

12. 5 x 3 = 15
13. Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.

14. What is meta merism? Give the structure and IUPAC name of metamers of 2-methyoxy propane

15. Give chemical tests to distinguish between propan-2-ol and 2-methyl-propan-2-ol.

16. How does glycerol react with KHSO4?

17. Account for the following: (i) Phenol has a smaller dipole moment than methanol, (ii) Phenols do not give protonation reaction readily.

18. 4 x 5 = 20
19. What will be the product for the following reaction acetylchloride $\\ \\ \overset { (i)CH_{ 3 }MgBr }{ \underset { (ii){ H }_{ 2 }{ O }^{ + } }{ \longrightarrow } } \times \overset { acid{ k }_{ 2 }{ cr }_{ 2 }{ o }_{ 7 } }{ \longrightarrow } A$ Identify X and A

20. How will you convert acetylene into n-butyl alcohol.

21. An aromatic hydrocarbon A reacts with propene in the presence of anhydrous AlCl3 to give a compound B with a molecular formula C9H12 Further compound B undergoes oxidation in the, presence of air to give hydrogenperoxide C. Compound C decomposes in HCI acid solution to give compound D and acetone. Identify A, B, C and D. Explain the reactions,

22. What is major product formed when 3,3-dimethyl-2-butanol is heated in the presence of H2SO4.