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Aparna Sahu
Subject: Chemistry
, asked on 5/4/18
T
h
e
d
e
n
s
i
t
y
o
f
a
g
a
s
a
t
N
T
P
i
s
2
.
5
g
d
m
-
3
.
I
t
s
m
o
l
e
c
u
l
a
r
m
a
s
s
i
s
(
a
)
22
.
4
(
b
)
1
(
c
)
5
.
6
(
d
)
56
Answer
2
Shreya Choudhary
Subject: Chemistry
, asked on 3/4/18
Solve this:
Q.18. When an ideal gas is compressed adiabatically and reversibly, the final temperature is:
(a) higher than the initial temperature
(b) lower than the initial temperature
(c) the same as initial temperature
(d) dependent upon the rate of compression
Answer
2
Shreya Choudhary
Subject: Chemistry
, asked on 3/4/18
Solve this:
Q.7. For an ideal gas, the value of
d
U
d
V
T
is :
(a) positive
(b) zero
(c) negative
(d) interchangeable
Answer
1
Kurian J
Subject: Chemistry
, asked on 1/4/18
During the electrolysis of AgNO
3
solution, the volume of O
2
formed at STP due to passage of 2A current 965 second is :
(1) 0.112 L (2) 0.224 L (3) 11.2 L (4) 22.4 L
Answer
1
Chaitanya
Subject: Chemistry
, asked on 30/3/18
Can FeCl3 and SnCl2 will react ???
Answer
1
Chaitanya
Subject: Chemistry
, asked on 30/3/18
Can Fe3+ be oxidized by HCl ??
Answer
1
Kevan Mehta
Subject: Chemistry
, asked on 29/3/18
Solution pl.
Q.54. 5 L solution of 0.4 M,
N
i
(
N
O
3
)
2
is electrolysed using Pt electrodes with 2.4125 ampere current for 10 hour, then molarity of
N
i
(
N
O
3
)
2
is -
1. 0.31 M
2. 0.22 M
3. 0.26 M
4. 0.40 M
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 16/3/18
No links please
(ii) Calculate the limiting molar conductivity of NH
4
OH if the following molar conductivities of NaCl, NaOH and NH
4
Cl are 126.45, 247.8 and 149.7 ohm
-1
cm
2
mol
-1
respectively.
Answer
2
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 15/3/18
No links please
21. (i) Write notes on (Example only)
(a) Bouveault Blanc reduction (b) Hoffmann hypobromide degradation
(ii) An organic compound 'A' om treatment with ethyl alcohol gives a carboxylic acid (B) and compound (C). Hydrolysis of 'C' under acidic conditions give 'B' and 'D'. Oxidation of 'B ' with KMnO
4
also gives 'B' Compound 'B' on heating with Ca(OH)
2
gives 'E'. Compound 'E' doesn't give Tollen's test and doesn't reduce Fehling's solution but forms yellow ppt. with Brady's reagent. Identify ' A' to 'E.
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 15/3/18
Q
-
Carbon
reduction
process
is
not
suitable
for
the
extraction
of
Al
from
Al
2
O
3
.
Why
?
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 15/3/18
12
.
Calculate
the
equilibrium
constant
for
the
redox
reaction
at
25
°
C
.
Fe
2
+
+
Ce
4
+
→
Fe
3
+
+
Ce
3
+
given
E
°
Ce
4
+
/
Ce
3
+
=
1
.
42
V
and
E
°
Fe
3
+
/
Fe
2
+
=
0
.
77
V
.
Answer
2
Piyush Kumar Maurya
Subject: Chemistry
, asked on 14/3/18
Q. Write the cell reaction and calculate the e.m.f. of the following cell at 298 K :
Sn(s) |
S
n
2
+
(0.004 M)||
H
2
(0.020 M) |
H
2
(g) (1 bar) | Pt(s)
(Given :
E
S
n
2
+
/
S
n
0
=
-
0
.
14
V
)
Answer
2
Rayyan Mansuri
Subject: Chemistry
, asked on 14/3/18
please answer this
Answer
1
Prerna Varshney
Subject: Chemistry
, asked on 12/3/18
Ques. The products of electrolysis of aqueous NaCl at the respective electrodes are :
Cathode :
H
2
Anode :
C
l
2
a
n
d
n
o
t
O
2
. Explain.
Answer
2
Megha Prasadan
Subject: Chemistry
, asked on 11/3/18
Write cell reaction in Lead Storage battery during discharge. No link pls
Answer
1
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What are you looking for?
Q.18. When an ideal gas is compressed adiabatically and reversibly, the final temperature is:
(a) higher than the initial temperature
(b) lower than the initial temperature
(c) the same as initial temperature
(d) dependent upon the rate of compression
(a) positive
(b) zero
(c) negative
(d) interchangeable
(1) 0.112 L (2) 0.224 L (3) 11.2 L (4) 22.4 L
Q.54. 5 L solution of 0.4 M, is electrolysed using Pt electrodes with 2.4125 ampere current for 10 hour, then molarity of is -
1. 0.31 M
2. 0.22 M
3. 0.26 M
4. 0.40 M
(ii) Calculate the limiting molar conductivity of NH4OH if the following molar conductivities of NaCl, NaOH and NH4Cl are 126.45, 247.8 and 149.7 ohm-1 cm2 mol-1 respectively.
21. (i) Write notes on (Example only)
(a) Bouveault Blanc reduction (b) Hoffmann hypobromide degradation
(ii) An organic compound 'A' om treatment with ethyl alcohol gives a carboxylic acid (B) and compound (C). Hydrolysis of 'C' under acidic conditions give 'B' and 'D'. Oxidation of 'B ' with KMnO4 also gives 'B' Compound 'B' on heating with Ca(OH)2 gives 'E'. Compound 'E' doesn't give Tollen's test and doesn't reduce Fehling's solution but forms yellow ppt. with Brady's reagent. Identify ' A' to 'E.
Q. Write the cell reaction and calculate the e.m.f. of the following cell at 298 K :
Sn(s) | (0.004 M)|| (0.020 M) | (g) (1 bar) | Pt(s)
(Given : )
Cathode :
Anode : . Explain.