NEET Questions - Chemistry - Organic compounds containing Oxygen

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Numbers of isomeric alcohols of molecular formula $C_5H_{12}O $ are

5
8
6
9

Which of the following will produce only one product on reduction with $LiAlH_4$ ?

$ CH_3COOCH_2CH_3 $
$ CH_3CH_2OCOCH_2CH_3 $
$ CH_3COOCH_3 $
$CH_3CH_2OCOCH_2CH_2CH_3$

$CH_3 CH_2 CH_2OH $ Can be converted to $CH_3 CH_2 CH_2COOH$ by the following sequence of steps:

$ PBr_3, KCN, H_2/{Ni} $
$ HCN, PBr_3, H_3O^+ $
$ PBr_3, AgCN, H3O^+ $
$ PBr_3, KCN, H3O^+ $

In the following Sequence of reactions,$ CH_3 CH_2 OH \xrightarrow [ ] { {P + I_2 }} A \xrightarrow [ { ether} ] { { Mg }} B \xrightarrow [ ] { {HCHO} } C \xrightarrow [ ] { {H_2 O } }D $ , the compound D is:

propanal
n-butyl alcohol
butanal
n-propyl alcohol

Acid catalysed hydration of alkenes except ethene leads to the formation of

primary alcohal
mixture of primary and secondary alcohols
secondary or tertiary alcohol
mixture of secondary and tertiary alcohols

During dehydration of alcohol to alkenes by heating with Conc $H_2SO_4$ , the initiation step is:

elimination of water
formation of an ester
formaton of carbocation
protonation of alcohol molecule

which of the following compounds will give positive iodoform test ?(I) 3- methyl propan-2-ol (II) I - methyl cyclopentanal (III ) I - phenyl propan-1-ol (Iv) 3- phenyl propan-2-ol.

I and I I
I and IV
I and I I
I and IV

Which of the following alcohal on heating with conc $H_2SO_4 $ gives product, which show geometrical isomerism ?

2,4- dimethyl pentan-3-ol
2- methyl butan -2-ol
butan-2-ol
all of the above

Propan -l-ol and propan-2-ol can be distinguished by

oxidation with alkaline $KMnO_4 $ followed by reaction with Fehing Solution
oxidation with acidic dichromate followed by reaction with Fehling Solution
oxidation by heating with cop er followed by reaction with Fehling Solution
oxidation with conc $H_2SO_4 $ followed by reaction with Fehling Solution

$ CH_3CH_2OH $ cannot be prepare by which of the following reaction ?

Hydrolysis of ethyl acetate
Hydroboration of ethene followed by oxidation in basic medium
Reaction of ethyl chloride with alcoholic potassium hydroxide
Reaction of ethylacetate

The most suitable reagent for the conversion of primary alcohol into aldehyde with the same number of carban is

$ acidified K_2Cr_2O_7 $
$ alkaline KMnO_4 $
$ acidified KMnO_4 $
pyridinium chlorochromate

An organic compound "X" on treatment with PDC in $CH_2Cl_2 $ gives compound "Y". Compound "Y", reacts with $ I_2 $ and alkali to form yellow precipitate. The compound "X" is

acetone
ethanal
ethanol
acetic acid.

How many optically active stereoisomers are pos idle for butan -2,3 -diol ?

1
2
3
4

The correct order of boiling points is for n-Butyl alcohol tert - Butyl alcohol (I) (II) iso - Butyl alcohol Sec- Butyl alcohol (I) (IV)

I >I >IV>I I
I I >IV>I >I
I >I I >I >IV
IV>I I >I >I

The boiling point of glycerol is more than propanol because of

hydrogen bonding
hybridization
arrangement of molecules
size of molecule

NEET Chemistry Questions: Organic compounds containing Oxygen