ALCOHOLS MCQ LEVEL 3.pdf

ALCOHOLS MCQ ANKUR SIR
1) Absolute alcohol
2) Proof spirit
3) Power alcohol
4) None of these
1. Industrial alcohol mixed with petrol and benzene is called

1) CH3OH 2) CH3 – CH2OH
3) C3H7OH 4) C4H9OH
2. When 3g of an alcohol is treated with excess of CH3MgI, then 1.12 lit.
of CH4 is obtained at S.T.P. Then the alcohol is
Solution:
𝑪𝑯𝟑𝑴𝒈𝑰 + 𝑹𝑶𝑯 → 𝑪𝑯𝟒 + 𝑴𝒈 𝑶𝑹 𝑿
3 gms of alcohol → 1.12lit of 𝑪𝑯𝟒
X ← 22.4 lit of 𝑪𝑯𝟒
X=
𝟐𝟐.𝟒×𝟑
𝟏.𝟏𝟐
= 60 grams

1) CH3CH2OH
2) CH3CHO
3) CH3COOH
4) CH2OH-CH2OH
3. CH𝟑OH + PCl𝟑 → A
𝐊𝐂𝐍
B
𝐡𝐲𝐝𝐫𝐨𝐥𝐲𝐬𝐢𝐬
CThen "C" is
Solution:
𝑪𝑯𝟑𝑶𝑯 + 𝑷𝑪𝒍𝟑 → 𝑪𝑯𝟑𝑪𝒍 𝑪𝑯𝟑𝑪𝑵 𝑪𝑯𝟑𝑪𝑶𝑶𝑯
KCN Hydrolysis

1) CH3CH2OH
2) CH3CHOHCH3
3) CH3CH2CH2OH
4) CH3CH2 CH2CH2OH
4. A compound reacts with sodium and liberates hydrogen and on
oxidation gives ketone. The formula of the compound could be.
Solution:
𝑪𝑯𝟑 − 𝑪𝑯 − 𝑪𝑯𝟑 𝑪𝑯𝟑 − 𝑪 − 𝑪𝑯𝟑
(𝑶)
𝑶
𝑶H

1) CH𝟑OH
2) C𝟐H𝟓OH
3) CH𝟑CHO
4) CH𝟑COCH𝟑
5. Iodoform cannot be prepared form
Solution:
𝑪𝑯𝟑𝑶𝑯 can not give +ve iodoform test

1) Propane
2) Ethanol
3) Ethyne
4) Ethylene
6. H−C≡CH + H𝟐
𝐏𝐝−𝐁𝐚𝐒𝐎𝟒/𝐐𝐮𝐢𝐧𝐨𝐥𝐢𝐧𝐞
A
𝐇𝐂𝐥
B
𝐊𝐎𝐇𝐚𝐪
C. Here the ‘C’ is
Solution:
H – C ≡ CH + 𝑯𝟐 𝑪𝟐𝑯𝟒
𝑪𝟐𝑯𝟓𝑪𝒍 𝑪𝟐𝑯𝟓𝑶𝑯
Pd-Ba𝑺𝑶𝟒 / Quinoline
HCl 𝑲𝑶𝑯(𝒂𝒒)

1) CH3OH, CH3ONa, CH3COCl 2) CH3OH, CH4, CH3Cl
3) CH3OH, CH3ONa, CH3Cl 4) CH3Cl, CH4, CH3OH
Solution:
𝑪𝑯𝟑𝑶𝑯 + 𝑵𝒂 → 𝑪𝑯𝟑𝑶−𝑵𝒂+ +
𝟏
𝟐
𝑯𝟐
7. Compound A reacts with Na metal to give B. A also reacts with PCl5
to give C. B and C reacts with each other to give dimethyl ether. Then
A, B and C respectively are
𝑪𝑯𝟑𝑶𝑯 + 𝑷𝑪𝒍𝟓 → 𝑪𝑯𝟑 − 𝑪𝒍 + 𝑷𝑶𝑪𝒍𝟑 + 𝑯𝑪𝒍
𝑪𝑯𝟑𝑶𝑵𝒂 + 𝑪𝑯𝟑𝑪𝒍 → 𝑪𝑯𝟑 − 𝑶 − 𝑪𝑯𝟑 + 𝑵𝒂𝑪𝒍

1) Aldehyde
2) Alcohol
3) Ether
4) Both 2 and 3
8. A compound (X) of molecular formula C3H8O can be oxidized to a
compound of molecular C3H6O2 (C), (X) is most likely to be.
Solution:
Alcohol gives acid on complete oxidation
The general formula of alcohol is 𝑪𝒏 𝑯𝟐𝒏+𝟐𝑶.

1) Ethylene bromide
2) Ethylidene bromide
3) Ethyl bromide
4) Vinyl bromide
9. In the sequence of reactions (Z) is
Solution:
C𝟐H𝟓 Br
𝐦𝐨𝐢𝐬𝐭 𝐀𝐠𝟐𝐎
X
𝐂𝐨𝐧𝐜.𝐇𝟐𝐒𝐎𝟒𝐚𝐭 𝟏𝟕𝟎𝟎𝐂
Y
𝐇𝐁𝐫
Z
𝑪𝟐𝑯𝟓𝑩𝒓 𝑪𝟐𝑯𝟓𝑶𝑯 𝑪𝟐𝑯𝟒 𝑪𝟐𝑯𝟓𝑩𝒓
Moist 𝑨𝒈𝟐𝑶 Con𝑯𝟐𝑺𝑶𝟒 𝒂𝒕 𝟏𝟕𝟎𝟎
𝑪 HBr

1) 1 2) 2 3) 4 4) 3
Solution:
2KI + 𝑯𝟐𝑶 + 𝑶𝟑 → 𝑰𝟐 + 𝟐𝑲𝑶𝑯 + 𝑶𝟐
10. I2 produced when ozone reacts with moist KI is used to convert
C2H5OH to CI3CHO. Number of moles of ozone required to convert
1 mole of of C2H5OH into CI3CHO is
𝑪𝑯𝟑𝑪𝑯𝟐𝑶𝑯 + 𝑰𝟐 → 𝑪𝑯𝟑𝑪𝑯𝑶 + 𝟐𝑯𝑰
𝑪𝑯𝟑𝑪𝑯𝑶 + 𝟑𝑰𝟐 → 𝑪𝑰𝟑𝑪𝑯𝑶 + 𝟑𝑯𝑰

1) CH3—CH2—CH2—OH 2) CH3—CH2—OH
3) CH3—CH(OH)—CH3 4) Both 2 and 3
11. Which of the following gives Iodo form test?
Solution:
Containing groups show positive iodoform test
𝑪𝑯𝟑 − 𝑪 𝑯 − 𝑶𝑯
𝑪𝑯𝟑

1) Propane 2) Propanol 3) Propene 4) Propyne
12. The compound B formed in the following sequence of reaction is
Solution:
CH𝟑CH𝟐CH𝟐OH
𝐏𝐂𝐥𝟑
A
𝐀𝐥𝐜.𝐍𝐚𝐎𝐇
B
𝑪𝑯𝟑𝑪𝑯𝟐𝑪𝑯𝟐𝑶𝑯 𝑪𝑯𝟑𝑪𝑯𝟐𝑪𝑯𝟐𝑪𝒍 𝑪𝟑𝑯𝟔
𝑷𝑪𝒍𝟑 𝑨𝒍𝒄 𝑵𝒂𝑶𝑯

1) CH3CH2CH2OH, CH3CH2CHO
2) CH3CHOHCH3 ,CH3COCH3
3) CH3CH2CHO, CH3CH2CH2OH
4) CH3COCH3, CH3CHOHCH3
Solution:
13. A compound "X" of the formula C3H8O gives iodoform test. On
oxidation with acidified K2Cr2O7, X gave Y. Y also gives iodoform
test then X and Y are
𝑪𝑯𝟑 − 𝑪𝑯 − 𝑪𝑯𝟑 𝑪𝑯𝟑 − 𝑪 − 𝑪𝑯𝟑
(𝑶)
𝑶
𝑶𝑯

1) x
2) y
3) z
4) all the three do not give test
14. There are three alcohols x,y,z which have 2,1 and 0 alpha hydrogen
atom(s) respectively. Which does not give Lucas Test immediately
Solution:
Tertiary alcohols readily give turbidity with in 30 seconds

1) IV III II I 2) IV III I II
15. Match the following
List - I
A. Glycerol I. Denatured alcohol
B. Ethylene glycol II. Absolute
ethanol + petrol
C. Methylated spirit III. Coolant
D. Power alcohol IV. Moisturiser
List - II
The correct match is
3) III IV II I 4) II III IV I
A B C D A B C D

1) Acetic acid
2) Acetaldehyde
3) Ethyl alcohol
4) Acetone
16. Which of the following can participate in both esterification and
iodoform reactions?

1) Both A and R are true and R is the correct explanation to A
2) Both A and R are true and R is not the correct explanation to A
3) A is true but R is false
4) A is false but R is true
17. Assertion (A): Dehydration of alcohols can be carried out with
Conc. H2SO4 but not with Conc. HCl.
Reason (R) : H2SO4 is dibasic and HCl is monobasic.

1) CHBr3
2) Br2
3) CH3Br
4) PBr3
18. Which one of the following reagents is useful in converting 1-butanol
to 1-bromobutane?
Solution:
𝑪𝑯𝟑 𝑪𝑯𝟐 𝟐𝑪𝑯𝟐𝑶𝑯 𝑪𝑯𝟑 𝑪𝑯𝟐 𝟐𝑪𝑯𝟐𝑩𝒓
𝑷𝑩𝒓𝟑

1) I > II > III
2) I < II < III
3) II > III > I
4) II > I > III
19. The correct order of boiling point of three isomeric compounds
CH3OCH2CH3 (I) CH3CH2CH2OH ( II) (CH3)2CHOH is (III)

ALCOHOLS MCQ LEVEL 3.pdf

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ALCOHOLS MCQ LEVEL 3.pdf