Which of the following alcohol is used as beverage ?
Propanol
2 - butanol
Methanol
Ethanol
D.
Ethanol
Ethanol is the common beverage .
Phenol and benzoic acid are distinguished by
NaOH
NaHCO3
Na2CO3
H2SO4
B.
NaHCO3
Phenol and benzoic acid can be distinguished by NaHCO3 because only stronger acid reacts with sodium bi-carbonate.
Propan-1-ol can be prepared from propene by
H2O/H2SO4
Hg(OAc)2/H2O followed by NaBH4
B2H6 followed by H2O2
CH3CO2H/H2SO4
C.
B2H6 followed by H2O2
Hydroboration yields 1° alcohol from alkenes.
3CH3CH=CH2 (CH3CH2CH2)3B
Assertion : Molar entropy of vaporisation of water is different from ethanol.
Reason : Water is more polar than ethanol.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
B.
If both assertion and reason are true but reason is not the correct explanation of assertion
Molar entropy of vaporization of water is more than ethanol, as water has greater forces of attraction than ethanol.
The compound which reacts faster with Lucas reagent is
butan-1-ol
butan-2-ol
2-methyl-propan-1-ol
2-methyl propan-2-ol
D.
2-methyl propan-2-ol
Tertiary alcohols react faster with Lucas reagent. They give turbidity with Lucas reagent (conc. HCl + anhyd. ZnCl2) at once. Hence, 2-methyl-propan-2-ol will react with Lucas reagent faster.
Phenol reacts with aqueous bromine to give :
+
D.
OH group in phenol ,activates the benzene ring ,hence it easily reacts with bromine water to give tribromo phenol .
Among the following the most reactive towards alcoholic KOH is
CH2=CHBr
CH3COCH2CH2Br
CH3CH2Br
CH3CH2CH2Br
D.
CH3CH2CH2Br
In alkyl halides, polarity of C - Br bond increases with increase in chain length.
The product obtained ,heating ethanol with conc. H2SO4 at 165° - 170°C is :
(C2H5)2SO4
CH2=CH2
CH2F-CH2F
CF2=CFCl
B.
CH2=CH2
Ethyl alcohol , on heating at 165° - 170°C with conc. H2SO4 , gives ethylene .
C2H5OH + H2O
The structural formula of picric acid is :
C.
Picric acid is 2 , 4 , 6 - trinitrophenol .It is a strong acid due to the presence of three nitro groups which stabilise trinitrophenoxide ion by resonace .
Which of the following will not react with NaOH ?
C2H5OH
CH3CONH2
CH(CN)3
B.
C2H5OH
C2H5OH (ethanol) is a very weak acid , hence it does not react with NaOH .However it reacts with - metallic sodium.