Classification of Alcohols

Q.

Why is the C - O - H bond angle in alcohols slightly less than the tetrahedral angle whereas the C - O - C bond angle in ether is slightly greater?

Q.

What is the chemical name of ${\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$?

Q.

The correct order of acidity of the following elements is $\left(\mathrm{i}\right)$Phenol $\left(\mathrm{ii}\right)$Methyl phenol $\left(\mathrm{iii}\right)$Meta-nitro phenol $\left(\mathrm{iv}\right)$ Para-nitro phenol

1. Phenol$>$Meta-nitrophenol$>$ Methyl phenol$>$Para nitrophenol

2. Para-nitrophenol $>$Meta-nitrophenol $>$Phenol$>$Methyl phenol

3. Methyl phenol$>$Phenol$>$Meta-nitrophenol$>$Para-nitrophenol

4. Phenol$>$Para-nitrophenol$>$Meta-nitrophenol$>$Methyl phenol

Q.

An oxidising agent is a substance that accepts electrons, and causes the other substances to get oxidized by losing electrons.

1. True

2. False

Q.

Which of the following compounds is aromatic alcohol?

(a) A, B, C, D
(b) A, D
(c) B, C
(d) A

Q.

What are alkyl groups? Give an example.

Q.

Give examples of compounds that contains alcoholic group

Q.

An organic compound A produces a gas with brisk effervescence when sodium bicarbonate is added to it. The compound A contains the same number of carbons as in ethane. The compound A reacts with ethanol to form a sweet smelling compound C in presence of conc. H₂SO₄ acid. Then the name of compound A and the gas evolved is:

1. Ethanoic acid ; CO₂

2. Methanoic acid ; CO₂

3. Ethanoic acid ; H₂

4. Methanoic acid ; H₂

Q.

What is primary , secondary and tertiary alcohols ?

Q.

Which of the following are benzylic alcohols?
(a) $C_6{H}_5-C{H}_2-C{H}_{2}OH$
(b) $C_6{H}_5-C{H}_{2}OH$
(c) $C_6{H}_5-\underset{\underset{C{H}_3}{|}}{CH}-OH$
(d) $C_6{H}_5-C{H}_2-\underset{\underset{C{H}_3}{|}}{CH}-OH$

Q.

Butane-2-ol is[CPMT 1977, 89]

1. Tertiary alcohol

2. Primary alcohol

3. Secondary alcohol

4. Aldehyde

Q. Incorrect match among the following is:

1. Cis-platin $–Pt$
2. Wilkinson catalyst $-Rh$
3. Vitamin $B_{12}–Cu$
4. Chorophyll $-Mg$

Q. from each of the following pairs select the compound that will react faster with sodium iodidein acetone 2-chloropropane or 2-bromopropane 1-bromobutane or 2-bromobutane

Q.

Methanol and ethanol are distinguished by

1. Treating with Schiffs reagent

2. Treating Lucas agent

3. Heating with Iodine and alkali

4. Treating with ${\mathrm{CrO}}_3$ in dil.${\mathrm{H}}_2{\mathrm{SO}}_4$

Q.

Glycerine has [MP PMT/PET 1988; MP PMT 1989, 91; AIIMS 1997]

1. One primary and two secondary-OH groups

2. One secondary and two primary-OH groups

3. Three secondary -OH groups

4. Three primary -OH groups

Q.

The general molecular formula, which represents the homologous series of alkanols is:

1. C_nH_2n+2O

2. C_nH_2n+2O

3. C_nH_2nO

4. C_nH_2nO₂

Q. Which of the following gives secondary alcohol on treatment with Grignard reagent? 1. Formaldehyde 2. Acetaldehyde 3. Acetone 4. Butanone

Q. 48.when a compound Z reacts with Pcl5 gives X which further react with alc.koh to give Y which react with conc.H2SO4+h2o+boil to give compound Z again.Then find Z. 1)propanol 2)propan-2-ol 3)1-ethyl propanol 4)propene

Q.

Glycerol is a [DPMT 1984, 2000; MP PET 2001; J & K 2005]

1. Primary alcohol

2. Monohydric alcohol

3. Secondary alcohol

4. Trihydric alcohol

Q. Which of the following will be most readily dehydrated in acidic conditions?

1. 
2. 
3. 
4. 

Q. Which of the following compound is the most basic?

1. 
2. 
3. 
4. All have equal basic strength.

Q. Select the correct statement regarding terminal alkynes.

1. Alkenes are more acidic than terminal alkynes
2. Terminal alkynes are more acidic when compared with alkenes
3. Terminal alkynes are not as acidic as alkanes
4. Terminal alkynes have no replacable acidic hydrogen atom

Q. Which of the following is an allylic alcohol?

1. ${CH}_2={CHCH}_2{OCH}_3$
2. $HOCH={CHCH}_2{CH}_3$
3. ${CH}_2={CHCH}_2{CH}_3$
4. ${CH}_{3}CH={CHCH}_{2}OH$

Q. Glycerol is

1. 1, 3-dihydroxypropane
2. 2, 3-dihydroxypropanone
3. 2, 3-dihydroxypropane
4. 1, 2, 3-propanetriol

Q. Methanol can be distinguished from ethanol by:

1. treating with schiff's reagent
2. treating $Cr{O}_3$ solution in dil. $H_{2}S{O}_4$
3. treating with Lucas reagent
4. heating with $I_2$ and alkali

Q.

General formula of primary alcohol is [CPMT 1975]

1. 

2. 

3. 

4. 

Q. convert ethyl magnesium bromide to ethane

Q. Draw the structural formula of 2-methylpropan-2-ol molecule.

Q. Propane has 2 alkyl radicles of which one is isopropyl but we use prefix iso when 2 c atom has one methyl group but in isopropyl 2 c atom donot have one methyl group so why (1-methyl ethyl) is called isopropyl as it donot have 1 methyl group on 2nd c atom

Q. Benzoylation of phenol in alkaline medium is known as

1. Friedel-Craft's reaction
2. Wurtz-Fittig reaction
3. Schotten-Baumann reaction
4. Sabatier Senderens reduction