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Ruba Balu
Subject: Chemistry
, asked on 20/5/18
To which group gallium belongs to
Answer
1
Shivansh Ahuja
Subject: Chemistry
, asked on 9/5/18
Q.60. The number of possible variations for unit cell having dimensions
a = 0.367 pm, b = 0.560 pm, c = 0.420 pm and
$\alpha =\beta =\gamma =90\xb0$
will be
(1) 2
(2) 3
(3) 4
(4) 1
Answer
1
Ranjitha R
Subject: Chemistry
, asked on 5/5/18
what are crystallites
Answer
1
Aaradhya Kondawar
Subject: Chemistry
, asked on 5/5/18
In a BCC unit cell if half of the atoms per unit cell are removed then the percentage void is:-
In a CCP type structure if half of the face centred atoms are removed, then percentage void in unit cell is
Answer
1
Aaradhya Kondawar
Subject: Chemistry
, asked on 4/5/18
Solve this:
Answer
1
Aaradhya Kondawar
Subject: Chemistry
, asked on 4/5/18
Q31
Answer
1
Aaradhya Kondawar
Subject: Chemistry
, asked on 4/5/18
Where are tetrahedral and octahedral voids located in HCP unit cell?
Answer
2
Amitesh Kumar
Subject: Chemistry
, asked on 3/5/18
Ans is A,B,C explain how,plz fast
Illustration -13.
Which of the following statements is (are) correct for the diamond structure ?
(A) Each atom has 4 nearest neighbours and 12 next- nearest neighbours
(B) It is relatively empty
(C) The maximum proportion of the available volume which may be filled by hard spheres is only 0.34.
(D) The maximum proportion of the available volume which may be filled by hard spheres is only 0.46
Answer
1
Hardik Gupta
Subject: Chemistry
, asked on 3/5/18
A metal crystallises into simple, body centred and face centred cubic structure, whose unit cell lengths are
A
1,
A
2 and
A
3 respectively. The correct order of lengths of the unit cells is:
A)
A
1
< A
2
< A
3
B)
A
2 <
A
3 <
A
1
C)
A
1 <
A
3 <
A
2
D)
A
3 <
A
1 <
A
2
PLEASE EXPLAIN THIS
Answer
1
Ayush
Subject: Chemistry
, asked on 2/5/18
SIR AYUSH , IT IS IMPORTANT TO TAKE NI+2 (2X) WHEN WE ARE TOLD TO CALCULATE NI+3 ONLY
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 30/4/18
Q1. Three atoms A, B & C crystallize in a cube solid lattice where A atoms are present at B.C. B atoms are present at E.C. as well as at corners of the cube & C atoms are present at F.C. of the cube. Now if all the atoms are removed from the two 4 - fold axis and the one
$\alpha $
- fold axis passing through the cube, formula of the compound is
(a) B
_{7}
C
_{2}
(b) AB
_{2}
C7
(c) ABC
_{2}
(d) A
_{5}
C
_{2}
Answer
1
Aparna Sahu
Subject: Chemistry
, asked on 26/4/18
Q.66. CsBr has B.C.C structure with edge length 4.3. The shortest inter ionic distance in betwee
$C{s}^{+}andB{r}^{-}$
is -
(a) 3.72
(b) 1.86
(c) 7.44
(d) 4.3
Answer
2
Shreya Choudhary
Subject: Chemistry
, asked on 25/4/18
three atoms A,b and C crystallize in a cubic solid lattice where A atoms are at the body centre, b is present at the edge centre as well at corners and c are present at face centres. now if all the atoms from the two fold axis and the one 2 fold axis passing through the cube. then the formula of cube is? how to solve
Answer
1
Alok Singh
Subject: Chemistry
, asked on 23/4/18
Solve this:
Answer
1
Alok Singh
Subject: Chemistry
, asked on 23/4/18
Solve this :
Q.
An element crystallises in a fee unit cell having an edge length 400 pm. The maximum diameter of an atom that can be placed in the interstitial site without distorting the structure is
A) 287.4 pm B) 225.3 pm
C) 175.2 pm D) 117.1 pm
Answer
1
1
2
3
4
5
Next
What are you looking for?

a = 0.367 pm, b = 0.560 pm, c = 0.420 pm and $\alpha =\beta =\gamma =90\xb0$ will be

(1) 2

(2) 3

(3) 4

(4) 1

In a CCP type structure if half of the face centred atoms are removed, then percentage void in unit cell is

Illustration -13.Which of the following statements is (are) correct for the diamond structure ?(A) Each atom has 4 nearest neighbours and 12 next- nearest neighbours

(B) It is relatively empty

(C) The maximum proportion of the available volume which may be filled by hard spheres is only 0.34.

(D) The maximum proportion of the available volume which may be filled by hard spheres is only 0.46

A metal crystallises into simple, body centred and face centred cubic structure, whose unit cell lengths are

A1,A2 andA3 respectively. The correct order of lengths of the unit cells is:A)

A1< A2< A3B)

A2 <A3 <A1 C)

A1 <A3 <A2

D)

A3 <A1 <A2PLEASE EXPLAIN THIS

(a) B

_{7}C_{2}(b) AB_{2}C7(c) ABC

_{2}(d) A_{5}C_{2}(a) 3.72

(b) 1.86

(c) 7.44

(d) 4.3

Q.An element crystallises in a fee unit cell having an edge length 400 pm. The maximum diameter of an atom that can be placed in the interstitial site without distorting the structure isA) 287.4 pm B) 225.3 pm

C) 175.2 pm D) 117.1 pm