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Takshitha
Subject: Chemistry
, asked on 6/4/18
ma'am .. which of the following has very high melting and boiling point?? and why
covalent solids
metallic soilds
Answer
1
Sanjukta Biswas
Subject: Chemistry
, asked on 6/4/18
Why is plastic is not considered as pseudo solids or super cooled liquids?
Answer
2
Sanjukta Biswas
Subject: Chemistry
, asked on 6/4/18
Why plastic cannot be termed as pseudo solids or super cooled solids?
Answer
1
Ranjitha R
Subject: Chemistry
, asked on 4/4/18
what is isotropic and anisotropic
Answer
2
Ranjitha R
Subject: Chemistry
, asked on 4/4/18
what are amorphous solids
Answer
1
Esha Dubey
Subject: Chemistry
, asked on 3/4/18
Why NaCl is hard though it is a crystalline solid but talcum powder is soft and smooth though it is an amorphous solid?
Answer
1
Sudipan
Subject: Chemistry
, asked on 2/4/18
Question 6 answer is given 1:1 please explain why.
Answer
1
Jyoti Mahajan
Subject: Chemistry
, asked on 2/4/18
Why does the window glass of an old building look milky ?
Answer
1
Annabeth Chase
Subject: Chemistry
, asked on 2/4/18
Solve this plzzz...
Q. Experimentally it was found that a metal oxide has formula
M
0
.
98
O
. Metal M, is present as
M
2
+
and
M
3
+
in its oxide. Fraction of the metal which exists as
M
3
+
would be :-
(1) 7.01 %
(2) 4.08 %
(3) 6.05 %
(4) 5.08 %
Answer
1
Annabeth Chase
Subject: Chemistry
, asked on 2/4/18
Solve this plzzz...
Q.62. The radius of
N
a
+
is 95 pm and that of
C
l
-
ion is 181 pm. Hence the co-ordination number of
N
a
+
will be
(1) 4
(2) 6
(3) 8
(4) 12
Answer
3
Annabeth Chase
Subject: Chemistry
, asked on 2/4/18
The coordination number of cation occupying an octahedral void is ? A. 4 B. 6 C.8 D. 12
Answer
2
Annabeth Chase
Subject: Chemistry
, asked on 2/4/18
Solve this please
Answer
1
Annabeth Chase
Subject: Chemistry
, asked on 2/4/18
Solve this plzzz...:
21. An element A crystallises in fcc structure. 200 g of element has 4.12 x 10
24
atoms. The density of A is 7.2 cm
-3
Calculate the edge length of the unit cell.
(1) 26.97 x 10
-24
cm (2) 299.9 pm
(3) 5 x 10
-12
cm (4) 2.99 cm
Answer
1
Vyshnav Shanil
Subject: Chemistry
, asked on 30/3/18
a compound formed by elements X and Y and crystallises in the cubic structure atoms Y are present on the corners as well as face centres wheras atoms X are present in the edge centres as well as body centre. what is the formula of the compound?
Answer
2
Siddhant
Subject: Chemistry
, asked on 30/3/18
A little amount of AlCl3 is introduced. What will be the no. of vacant sites?
SrCl2 is present initially.
Answer
1
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Q. Experimentally it was found that a metal oxide has formula . Metal M, is present as and in its oxide. Fraction of the metal which exists as would be :-
(1) 7.01 %
(2) 4.08 %
(3) 6.05 %
(4) 5.08 %
Q.62. The radius of is 95 pm and that of ion is 181 pm. Hence the co-ordination number of will be
(1) 4
(2) 6
(3) 8
(4) 12
21. An element A crystallises in fcc structure. 200 g of element has 4.12 x 1024 atoms. The density of A is 7.2 cm-3 Calculate the edge length of the unit cell.
(1) 26.97 x 10-24 cm (2) 299.9 pm
(3) 5 x 10-12 cm (4) 2.99 cm
SrCl2 is present initially.