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Ruba Balu
Subject: Chemistry
, asked on 7/5/18
How zinc is used for the recovery of silver
Answer
1
Aditi Sharma
Subject: Chemistry
, asked on 5/5/18
Plz answer question 1
Answer
2
Prerna Varshney
Subject: Chemistry
, asked on 26/4/18
Cassiterite is concentrated by levigation or electromagnetic separation ???
8. Cassiterite is concentrated by.
(a) liquefaction.
(b) floatation
(c) electromagnetic separation.
(d) levigation.
Answer
1
Shri Ganesh
Subject: Chemistry
, asked on 21/4/18
hep me solve this
3.13
Consider the following sequence of reactions.
The correct statement(s) is / are
(A)
X
is a mixture of almost equal amounts of two isomers.
(B)
Y
is a basic compound.
(C)
Z
is a racemic mixture.
(D)
Q
is 3,4 - dimethoxybenzoic acid.
Answer
1
Muhammad Arafath R Z
Subject: Chemistry
, asked on 18/4/18
Metallurgy online 2018 mains:
9.3 In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X' .When CO
2
gas is passed through the aqueous solution of 'X' a hydrated compound 'Y' is precipitated. 'X' and "y' respectively are :
Option
1
.
N
a
A
l
O
H
4
a
n
d
A
l
2
C
O
3
3
x
H
2
O
2
.
A
l
O
H
3
a
n
d
A
l
2
O
3
x
H
2
O
3
.
N
a
A
l
O
2
a
n
d
A
l
2
C
O
3
3
x
H
2
O
3
.
N
a
A
l
O
H
4
a
n
d
A
l
2
O
3
x
H
2
O
Answer
1
Gitika
Subject: Chemistry
, asked on 16/4/18
q no 23 ch-general organic
Q.23. Which one of the following conformation of cyclohexane is chiral ?
1) Twist boat
2) Rigid
3) Chair
4) Boat
Answer
1
Gitika
Subject: Chemistry
, asked on 16/4/18
q no 10 ch-general organic chemistry
Q.10.
The IUPAC name of the compound
1) 3, 3 - dimethyl -1- hydroxycyclohexane
2) 1, 1 - dimethyl -3- cyclohexanol
3) 3, 3- dimethyl -1- cyclohexanol
4) 1, 1 - dimethyl -3- hydroxycyclohexane
Answer
1
Sree Harine Govindaraj
Subject: Chemistry
, asked on 9/4/18
Pls view attachment
Pls view attachment
29. By mean of the given analytical results show that law of multiple proportions is true :
Mercurous chloride Mercuric chloride
Mercury = 84.92 % Mercury = 73.80%
Chlorine = 15.08 % Chlorine = 26.20 %
Answer
1
Kevan Mehta
Subject: Chemistry
, asked on 29/3/18
The state of hybridisation for the transition state of hydrolysis mechanism of
B
C
l
3
and
S
F
4
are respectively
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 19/3/18
An organic compound A (C2H6O) reacts with sodium to form a compound 'B' wih evolution of H2 gas and gives a yellow ppt. 'C' when treated with I2 and NaOH. When heated with conc. H2SO4 at 413k. "A" gives a compound D(C4H10O) which on reaction with conc. HI at 373H gives E. D is also obtained when B is heaed with E. Identify A to E.
"PLEASE DO NOT GIVE ANY LINKS."
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 15/3/18
No links please
Q.(ii) The density of a metal (atomic mass = 60.2) with face centred cubic lattice is 6.25 gm/cc. Calculate the edge length of the unit cell.
Answer
1
Shafaq Elahi
Subject: Chemistry
, asked on 12/3/18
What are depresaants
Answer
2
Nithyashrri Saravanan
Subject: Chemistry
, asked on 12/3/18
Dear experts what is the purpose of CO in refining of crude Nickel?
Answer
1
Sandra Saju
Subject: Chemistry
, asked on 11/3/18
Give an example of zone refining of metals.
Answer
1
Sandra Saju
Subject: Chemistry
, asked on 10/3/18
Write the role of the following :
(i) CO in the purification of nickel.
(ii) Graphite rod in the electrometallurgy of aluminium
Answer
1
1
2
3
4
5
Next
What are you looking for?
8. Cassiterite is concentrated by.
(a) liquefaction.
(b) floatation
(c) electromagnetic separation.
(d) levigation.
3.13 Consider the following sequence of reactions.
The correct statement(s) is / are
(A) X is a mixture of almost equal amounts of two isomers.
(B) Y is a basic compound.
(C) Z is a racemic mixture.
(D) Q is 3,4 - dimethoxybenzoic acid.
9.3 In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X' .When CO2 gas is passed through the aqueous solution of 'X' a hydrated compound 'Y' is precipitated. 'X' and "y' respectively are :
Option
Q.23. Which one of the following conformation of cyclohexane is chiral ?
1) Twist boat
2) Rigid
3) Chair
4) Boat
Q.10.
The IUPAC name of the compound
1) 3, 3 - dimethyl -1- hydroxycyclohexane
2) 1, 1 - dimethyl -3- cyclohexanol
3) 3, 3- dimethyl -1- cyclohexanol
4) 1, 1 - dimethyl -3- hydroxycyclohexane
29. By mean of the given analytical results show that law of multiple proportions is true :
Mercurous chloride Mercuric chloride
Mercury = 84.92 % Mercury = 73.80%
Chlorine = 15.08 % Chlorine = 26.20 %
The state of hybridisation for the transition state of hydrolysis mechanism of and are respectively
"PLEASE DO NOT GIVE ANY LINKS."
Q.(ii) The density of a metal (atomic mass = 60.2) with face centred cubic lattice is 6.25 gm/cc. Calculate the edge length of the unit cell.
(i) CO in the purification of nickel.
(ii) Graphite rod in the electrometallurgy of aluminium