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CBSE Questions for Class 12 Engineering Chemistry Alcohols,Phenols And Ethers Quiz 11 - MCQExams.com

CH3OHP+I2AHeatingalc KCNBLiAlH4Na/alcoholCHNO2NaNO2 + dil HClD

What is D?
  • CH3CHO
  • CH3COOH
  • CH3CH2OH
  • CH3OCH3
Phenol is an organic compound even though it is soluble in water due to the presence of:
  • ionic bonding
  • covalent bonding
  • hydrogen bonding
  • coordinate bonding
Identify E:
522770_3288490e866a49688f27f9e25bd4f4dd.png
  • ethene
  • ethane
  • ethyne
  • propyne
Product formed in the following reaction is/are :
617487_1ad581e575ab4283aa3b736d82cf6b6d.png
  • both (A) and (B)
  • none is correct
Under suitable condition temperature,pressure and catalyst,methanol can be obtain by:
  • partial oxidation of hydrocarbons
  • reacting H2 with CO
  • reacting H2 with CO2
  • All the above
The major product of the reaction is:
631437_693b5a4e6f6e446ea738a7195f4d9fe9.jpg
  • I
  • II
  • III
  • IV
The major product of the following reaction is:
629601_1ed08841a11b4deda363beeb68067bc2.png
In the following sequence of reactions,

 CH3BrKCNAH3O+BLiAlH4C

The end product C is:
  • Ethyl alcohol
  • Acetaldehyde
  • Acetone
  • Methane
Compound A of molecular formula C4H10O on treatment with Lucas reagent at room temperature gives compound B. When compound B is heated with alcoholic KOH, it gives isobutene. Compound A and B are respectively:
  • 2-methyl-2-propanol and 2-methyl-2-chloropropane
  • 2-methyl-1-propanol and 1-chloro-2-methylpropane
  • 2-methyl-1-propanol and 2-methyl-2-chloropropane
  • butan-2-ol and 2-chlorobutane
  • none of the above

Phenol is more acidic than:
  • C2H2
  • Both (A) and (C)
Isopropylbenzene is oxidized in the presence of air to compound A. When compound A is treated with dilute mineral acid, the aromatic product formed is:
  • phenol
  • benzene
  • benzaldehyde
  • acetophenone
  • toluene
In the preparation of alkene from alcohol using Al2O3 which is effective factor?
  • Porosity of Al2O3
  • Temperature
  • Concentration
  • Surface area of Al2O3
Write the IUPAC name of OH|CH3CH2CCH2CH3|CH3
  • 3-Methylpentan-3-ol
  • 3-Hydroxyhexane
  • 3-Hydroxy-3-methyl pentane
  • All of the above
Which of the following is the correct order regarding ease of dehydration of above compounds?
712212_85e03cc919c24253b179e941b51ec79a.png
  • I > III > II > IV
  • IV > III > II > I
  • IV > II > III > I
  • III > IV > II > I
Choose the correct statement.
671823_dbd604d249c848a3a3f3c336f4f4fcac.png
  • A is more volatile than B
  • B is more volatile than A
  • A is formed more rapidly at a higher temperature
  • A is formed in higher yield at a low temperature

In the given reaction, number of possible structure is:
659473_ca798db9296c47e7bcf6adfae97e0d5f.png
  • 1
  • 2
  • 5
  • 6
Synthesis of cyclohexane-1, 2-diol from cyclohexene may be accomplished in two way:
MnO4 dilute, OH at 273K.
peracid epoxidation followed by NaOH opening of the epoxide ring.
Which of the following statements/are correct :
  • Method 1 and 2 give same product.
  • Method 1 gives resolvable racemic mixture while 2 will give non resolvable achiral product.
  • Method 1 gives non resolvable optivally inactive compound while method 2 gives resolvable racemic mixture.
  • Product obtain in 1 and 2 will have diasteriomeric relationship.
The product of the reaction is:
770047_26de69de4a2d47c88615ab57d8e26591.png
Propan 2olAi2O32500CAH2O2HBrBaq.KOH
What is the final product in the following reaction sequence?
  • Propan-2-ol
  • Propan-1-ol
  • Ethane 1, 2 diol
  • Propane 1, 2-diol
The relationship between the reactant and the final product is:
782158_8f6405213eee4f98abae8b24aa800047.png
  • position isomers
  • identical compounds
  • enantiomers
  • none of the above 
An alcohol (A) on dehydration gives (B), which on Ozonolysis gives acetone and formaldehyde. (B) decolorises alkaline KMnO4 solution but (A) does not. (A) and (B) respectively are:
  • CH3CH2CH2CH2OH and CH3CH2CH=CH2
  • CH3CH2OH|CHCH2 and CH3CH=CHCH3
  • (CH3)3COH and (CH3)2C=CH2
  • CH3CH2OH|CHCH3 and (CH3)2C=CH3
Ether is more volatile than alcohol having same molecular formula because of:
  • dipolar character of ether
  • alcohols having resonance structure
  • intermolecular hydrogen bonding in ethers
  • intermolecular hydrogen bonding in alcohols
Which of the following is not possible ? 
  • Both A and B
  • None of these
The ease of dehydration in the following compounds is:
810703_d6280797e8df46fe85769e06e52c453c.png
  • I>III>IV>II
  • II>I>III>IV
  • IV>I>III>II
  • III>I>II>IV
Acid catalysed dehydration of t-butanol is faster than that of n-butanol because:
  • tertiary carbocation is more stable than primary carbocation
  • primary carbocation is more stable than tertiary carbocation
  • t-butanol has a higher boiling point
    • rearrangement takes place during dehydration of t-butanol.
Rate of dehydration of the following in increasing order is:
937685_587f29b5b2164c64a908acbe79bd55df.png
  • I<II<III<IV
  • II<III<IV<I
  • I<III<IV<II
  • none of these
The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan -1-ol are respectively ?
  • 1-methylcyclohexence and but - 1-ene
  • 2-methylcyclohexence and but - 2-ene
  • 2-methylcyclohexence and butane
  • 1-methylcyclohexence and but -2-ene.
Which of the following is not a characteristic of alcohol ?
  • They are lighter than water.
  • Their boiling points rise fairly uniformly with rising molecular weight.
  • Lower members are insoluble in water and organic solvents but the solubility regularly increases with molecular mass.
  • Lower members have a pleasant smell and burning taste, higher members are colourless and tasteless.
  • Higher members have a pleasant smell and burning taste, lower members are colourless and tasteless.
2.2 g of an alcohol (A) when treated with CH3-MgI liberates 560 mL of CH4 at STP. Alcohol (A) on dehydration followed by ozonolysis gives ketone (B) along with (C). Oxime of ketone (B) contains 19.17% N. (A) on oxidation gives ketone (D) having same number of carbon atom .
Structure of (A) is ?
  • CH3C|CH3HCH2C|OHHCH3
  • CH3C|CH3HCHC|OHHCH3
  • CH3CH2C|OHHCH2CH3
  • CH3CH3|C|CH3CH2OH
Consider the following reaction sequence, 

CH3CH(OH)CH3Conc.H2SO4HeatXdil.H2SO4H2OY

X and Y in the reaction respectively are :
  • CH3CH=CH2,CH3CH(OH)CH3
  • CH3CH=CHCH3,CH3CH2CH2OH
  • CH3CH2CH=CH2,CH3CH2CH2OH
  • CH3CH2CH2CH3,CH3CH(OH)CH2CH3
What happens when tertiary butyl alcohol is passed over heated copper at 3000C ?
  • Secondary butyl alcohol is formed.
  • 2-Methylpropene is formed .
  • 1-Butene is formed .
  • Butanal is formed.
Which of the following reactions will not yield phenol?
Major product obtained in the reaction is :
991948_7da1f14d5b954d1293e44127afd827d4.png
Which of the following is the correct order of boiling point?
  • chloroethane < ethane < ethanol
  • ethane < chloroethane < ethanol
  • ethanol < ethane < chloroethane
  • ethane > chloroethane > ethanol
Compare rate of dehydration of (i), (ii), and (iii) by conc. H2SO4 .
989389_24ff5016a35740e6b02d7a6f9a2fcd1b.png
  • (i) > (iii) > (ii)
  • (i) > (ii) > (iii)
  • (ii) > (i) > (iii)
  • (ii) > (iii) > (i)
Product (A) of the given reaction is?
995845_2db2a4e4a2ca4e088cd68600d28b198c.png
Decreasing order of acidic strength of different (-OH) group is:
988780_8f70ac0cbf6145c28a5bdc7d964a144b.PNG
  • w>x>y>z
  • w>z>x>y
  • z>w>x>y
  • z>x>w>y
A solution of Ph3CCO2H in conc. H2SO4 gives (X) when poured into methanol X is :
  • Ph3CO||COCH3
  • Ph2CHO||CO=CH3
  • Ph3COCH3
  • Ph3CCH3
Based on above isomers answer the following.
Which isomers on dehydration give most stable alkene?

991889_ad5fce8c290d4ea3842a60f168890e11.png
  • a, b, g, 
  • d, e, f, g, h
  • c,d, b, g
  • None of these
Major product which you expect in the above reaction is :
989681_78476cbabdbf493aafc494f41d87ae56.png
Adipic acid P2O2CO2H2OAdilOHB
The compound B can be:
In the reaction CH3CH2ONa+CH3CH2OSO2CH3THFheat   the product formed is
  • CH3CH2OCH3
  • CH3CH2OCH2CH3
  • CH3CH2OSO2OCH2CH3
  • CH3CH2OSO2OCH3
Dehydration of following alcohols will be in order :
1121629_6ba8a2c9817a4194a7d0ab5135e49771.png
  • 1<2<3<4
  • 4>3>1>2
  • 4<2<1<3
  • 1>3>4>2
(CH3)2CHCH2CNHCl,H2OHeatAI.LiAlH4II.H2OBPCCCH2Cl2C. The compound 'C'  is:
  • (CH3)2CHO||CCH3
  • (CH3)2CHCH2O||CH
  • (CH3)2CHCH2O||COH
  • (CH3)2CHO||CCH2OH

What will be product in given reaction?
1055138_3056a32169e745c89e9f204470f51372.png
Consider the following sequence of reactions:
C2H5CCHCH3MgBr(A)H2OHCHO(B)
The product (B) is:
  • CH3CH2OH
  • C2H5C|=CH3CHCH2OH
  • C2H5CCC|HOHCH3
  • C2H5CCCH2OH
Solve the reaction:
1150441_a0d238d457b9448a819b1e84f6055488.png
In the given reaction, the product 'Y' is:
1176280_24f92fa0cb2d4036b3d4285827a7fc67.png
  • a positive isomer of X.
  • identical to X.
  • chain isomer of X.
  • an oxidation product of X.
Which has the smallest size ?
  • Na+
  • Mg2+
  • Al3+
  • P5+
Complete the equation:-
1152363_785920168813400090836f9a990e7c76.PNG
0:0:2


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