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Mitali
Subject: Chemistry
, asked on 14/5/18
Please explain with a proper reason...Aldol condensation product of the reactant is given in the diagram... why is the second product not formed..??:
Answer
1
Ritesh Ranjan Rath
Subject: Chemistry
, asked on 8/5/18
Solve this:
145. Which of the following is correct with respect to - I effect of the substituents ? (R = alkyl)
(1) - NR
2
>-OR>-F
(2) -NH
2
<-OR<-F
(3) -NH
2
>-OR>-F
(4) -NR
2
<-OR<-F
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Q.63.
→
P
C
C
(
A
)
→
H
C
H
O
+
d
i
l
.
K
O
H
(
B
)
. Product 'B' is
Answer
2
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Q56. The compound X in the reaction is X
→
C
H
3
M
g
l
Y
→
h
y
d
r
o
l
y
s
i
s
M
g
O
H
l
+
C
H
3
C
O
O
H
(1) HCHO (2) CH
3
CHO
(3) (CH
3
)
2
CO (4) CO
2
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Q49. Major product of the following reaction is PhCOOH + C
2
H
5
MgBr
→
Major product
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Please ans 57.Option (4)
Q.57. Which of the following does not take place in Cannizzaro reaction?
(1) Nucleophilic addition
(2) Transfer of acidic hydrogen
(3) Hydride shift
(4) Loss of water molecule
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Explain question.56. Ans (1)
Q.56. Which of the following gives positive test with Fehling's solution?
(1) Methanoic acid
(2) Benzene carbaldehyde
(3) Acetophenone
(4) Benzophenone
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 1/5/18
Explain quesno.52. Ans(2)
Q.52. Consider the reaction
Product P is
(1)
(2)
(3)
(4)
Answer
2
Archana
Subject: Chemistry
, asked on 27/4/18
answer this !!!!!
48.
Which of the following orders of relative strength of acids is correct?
A. CH
3
COOH > HCN > H
2
O > C
2
H
5
OH
B. CH
3
COOH < HCN < H
2
O < C
2
H
5
OH
C. CH
3
COOH > HCN < H
2
O < C
2
H
5
OH
D. CH
3
COOH < HCN < H
2
O > C
2
H
5
OH
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 26/4/18
Please answer 13th one:
13. The precipitate formed by mixing silver nitrate and sodium chloride solution disappear on adding ethyl amine it is due to the formation of
(1) C
2
H
5
CI (2) C
2
H
5
NO
2
(3) [Ag(C
2
H
5
NH
2
)
2
]CI (4) CH
3
COCI
Answer
2
Jeneeta Eliza John
Subject: Chemistry
, asked on 25/4/18
How to identify which ketone among option (1) and (4) undergoes Baeyer Villiger oxidation?
Q12. An organic compound does not reacts with Tollen's reagent but undergoes Baeyer Villiger oxidation. The compound is
(1)
(2)
(3)
C
H
3
C
H
O
(4)
Sol. Answer (4)
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 25/4/18
Please explain why the answer is (4):
41. Which of the following has maximum extent of resonance ?
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 25/4/18
Please answer the following question
Q36. A halogen compound A on hydrolysis with dil. alkali followed by acidification gives acetic acid. The compound A is
(1) CH
3
CCl
3
(2) CH
3
CHCl
2
(3) ClCH
2
CH
2
Cl (4) Cl – CH
2
– CHCl
2
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 25/4/18
Please explain the 20th one Ans is (4)
Q.20.
Incorrect statement
(1) Reaction requires weakly acidic medium
(2) Product shows geometrical isomerism
(3) This reaction is nucleophilic addition reaction with elimination
(4) This reaction proceed via formation of carbocation
Answer
1
Jeneeta Eliza John
Subject: Chemistry
, asked on 25/4/18
Please explain why the answer to the 11th one is option 3
Answer
3
1
2
3
4
5
Next
What are you looking for?
145. Which of the following is correct with respect to - I effect of the substituents ? (R = alkyl)
(1) - NR2>-OR>-F
(2) -NH2<-OR<-F
(3) -NH2>-OR>-F
(4) -NR2<-OR<-F
(1) HCHO (2) CH3CHO
(3) (CH3)2CO (4) CO2
Q.57. Which of the following does not take place in Cannizzaro reaction?
(1) Nucleophilic addition
(2) Transfer of acidic hydrogen
(3) Hydride shift
(4) Loss of water molecule
Q.56. Which of the following gives positive test with Fehling's solution?
(1) Methanoic acid
(2) Benzene carbaldehyde
(3) Acetophenone
(4) Benzophenone
Q.52. Consider the reaction
Product P is
(1)
(2)
(3)
(4)
48. Which of the following orders of relative strength of acids is correct?
A. CH3COOH > HCN > H2O > C2H5OH
B. CH3COOH < HCN < H2O < C2H5OH
C. CH3COOH > HCN < H2O < C2H5OH
D. CH3COOH < HCN < H2O > C2H5OH
13. The precipitate formed by mixing silver nitrate and sodium chloride solution disappear on adding ethyl amine it is due to the formation of
(1) C2H5CI (2) C2H5NO2
(3) [Ag(C2H5NH2)2]CI (4) CH3COCI
Q12. An organic compound does not reacts with Tollen's reagent but undergoes Baeyer Villiger oxidation. The compound is
(1)
(2)
(3)
(4)
Sol. Answer (4)
41. Which of the following has maximum extent of resonance ?
Q36. A halogen compound A on hydrolysis with dil. alkali followed by acidification gives acetic acid. The compound A is
(1) CH3CCl3 (2) CH3CHCl2
(3) ClCH2CH2Cl (4) Cl – CH2 – CHCl2
Q.20.
Incorrect statement
(1) Reaction requires weakly acidic medium
(2) Product shows geometrical isomerism
(3) This reaction is nucleophilic addition reaction with elimination
(4) This reaction proceed via formation of carbocation