NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Royel Ghost
Subject: Chemistry
, asked on 16/5/18
pls solve QUESTION number 6 . ....explain me the QUESTION as well as the answer with detailed steps...
Question No. 6
A student was performing a titration experiment with 15 mL of hydrazine sulphate solution and ferric chloride solution. During the reaction, ferric ions were reduced to ferrous ions and were estimated with the help of 0.02 M
K
M
n
O
4
. The volume of
K
M
n
O
4
solution used by ferrous ions was 30 mL. Find the amount of hydrazine sulphate present in 1 L of solution.
A. 5.3 g
B. 6.5 g
C. 7.0 g
D. 8.2 g
Answer
2
Nirav
Subject: Chemistry
, asked on 12/5/18
Why is it not required to add 273 in the temperature given in degree celsius to convert it into kelvin in case of equations of elevation in boiling point and depression in freezing point?
Answer
2
Avinash R
Subject: Chemistry
, asked on 11/5/18
p=/Kh x
higher the value of Kh at a given pressure,the lower is the solubility of the gas in the liquid. why?
Answer
1
Bhavya Jain
Subject: Chemistry
, asked on 8/5/18
Please help me with thi
s titration question of oxalic acid and NaOH:
47. 3.15 g oxalic acid [(COOH)
2
xH
2
O]
was dissolved to make 500 mL solution. On titration, 33.36 mL of this solution were neutralised by 50 mL N /15 NaOH. The value of X will be
a. 3 b. 2
c. 1 d. 4
Answer
1
Bhavya Jain
Subject: Chemistry
, asked on 8/5/18
Please help me wit
h this titration question of oxalic acid and NaOH:
47. 3.15 g oxalic acid [(COOH)
2
x H
2
O] was dissolved to make 500 mL solution. On titration, 33.36 mL of this solution were neutralised by 50 mL N /15 NaOH. The value of X will be
a. 3 b. 2
c. 1 d. 4
Answer
1
Aishwarya
Subject: Chemistry
, asked on 8/5/18
From a measurement of the freezing-point depression of benzene, the molecular weight of acetic acid in a benzene solution was determined to be 100. The percentage association of acetic acid is:
Answer
1
Aparna Sahu
Subject: Chemistry
, asked on 8/5/18
Q.7. The weight of silver nitrate required to prepare 60 ml of 0.03 g per ml of
A
g
N
O
3
will be
A. 1.8 g
B. 0.18 g
C. 2.5 g
D. 9 g
Answer
1
Aparna Sahu
Subject: Chemistry
, asked on 8/5/18
Q.25. The molal freezing point constant for water is
1
.
86
°
C
m
o
l
a
l
-
1
. So the solution containing 1 g of cane sugar in 1 kg of water will freeze at
A.
273
-
1
.
86
343
K
B. 271.14 K
C. + 171.5 K
D. 273 K
Answer
1
Aparna Sahu
Subject: Chemistry
, asked on 8/5/18
Solve this.:
23. The vapour pressure of pure benzene at 298 K is 97.0 mm Hg. The vapour pressure of solution containing 10.0 g of naphthalene (mol. wt. 128) in 100 g of benzene at 398 K will be.
A. 79.5 mm Hg. B. 91.43 mm Hg
C. 81.45 mm Hg. D. 66.5 mm Hg.
Answer
1
Haripriya
Subject: Chemistry
, asked on 7/5/18
How does a burette work?
Answer
2
Sangeeta Jha
Subject: Chemistry
, asked on 7/5/18
W
h
i
c
h
o
f
t
h
e
f
o
l
l
o
i
w
n
g
s
a
l
t
s
h
a
s
t
h
e
g
r
e
a
t
e
s
t
m
o
l
a
r
s
o
l
u
b
i
l
i
t
y
i
n
p
u
r
e
w
a
t
e
r
?
a
)
C
a
C
O
3
K
s
p
=
8
.
7
×
10
-
9
b
)
C
u
S
K
s
p
=
8
.
5
×
10
-
45
c
)
A
g
2
C
O
3
K
s
p
=
6
.
2
×
10
-
12
d
)
P
b
9
I
O
3
K
s
p
=
2
.
6
×
10
-
13
Answer
1
Haripriya
Subject: Chemistry
, asked on 6/5/18
how to calculate the number of gram atoms?
Answer
2
Ipsita Dash
Subject: Chemistry
, asked on 5/5/18
Calculate the freezing point of the solution, when 31g of ethylene glycol is dissolved in 500g of water. ( Given Kf= 1.86 K kg/mol)
Answer
1
Ipsita Dash
Subject: Chemistry
, asked on 5/5/18
1.01% of aqueous solution of KNO3 is 90% dissociated at 300K. Calculate its osmotic pressure.
Answer
1
Aaradhya Kondawar
Subject: Chemistry
, asked on 4/5/18
What volume of water should be added to 100ml of HNO3, having density 1.4 g/cc and 63% by mass to have one molar solution?
Answer
1
Prev
1
2
3
4
5
Next
What are you looking for?
Question No. 6
A student was performing a titration experiment with 15 mL of hydrazine sulphate solution and ferric chloride solution. During the reaction, ferric ions were reduced to ferrous ions and were estimated with the help of 0.02 M . The volume of solution used by ferrous ions was 30 mL. Find the amount of hydrazine sulphate present in 1 L of solution.
A. 5.3 g
B. 6.5 g
C. 7.0 g
D. 8.2 g
higher the value of Kh at a given pressure,the lower is the solubility of the gas in the liquid. why?
47. 3.15 g oxalic acid [(COOH)2xH2O] was dissolved to make 500 mL solution. On titration, 33.36 mL of this solution were neutralised by 50 mL N /15 NaOH. The value of X will be
a. 3 b. 2
c. 1 d. 4
47. 3.15 g oxalic acid [(COOH)2 x H2O] was dissolved to make 500 mL solution. On titration, 33.36 mL of this solution were neutralised by 50 mL N /15 NaOH. The value of X will be
a. 3 b. 2
c. 1 d. 4
A. 1.8 g
B. 0.18 g
C. 2.5 g
D. 9 g
A.
B. 271.14 K
C. + 171.5 K
D. 273 K
23. The vapour pressure of pure benzene at 298 K is 97.0 mm Hg. The vapour pressure of solution containing 10.0 g of naphthalene (mol. wt. 128) in 100 g of benzene at 398 K will be.
A. 79.5 mm Hg. B. 91.43 mm Hg
C. 81.45 mm Hg. D. 66.5 mm Hg.