NUMERICALS BASED ON DENSITY IN SOLID STATE
Authored by AMULYA KUMAR SAMAL
Chemistry
12th Grade
25 Questions
Used 6+ times
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Gold crystallizes in a face-centered cubic lattice. If the length of the edge of the unit cell is 407 pm, calculate the density of gold as well as its atomic radius assuming it to be spherical. Atomic mass of gold=197amu.
19.4gm/cm3,143.9pm
21gm/cm3,150.1pm
25gm/cm3,149pm
18gm/cm3,160pm
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The effective radius of an iron atom is 1.42 Å. It has rock salt like structure. Calculate its density (Fe=56 amu).
4.74g/cm3
3.74g/cm3
5.74g/cm3
6.74g/cm3
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The edge length of NaCl unit cell is 564 pm. What is the density of NaCl in g/cm3?(NA=6.02 X 1023, Na=23 u and Cl=35.5u)
4.16g/cm3
2.16g/cm3
5.16g/cm3
6.16g/cm3
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The compound CuCl has Zns structure and the edge length of its unit cell is 500 pm. Calculate its density (Atomic masses: Cu=63.5u, Cl=35.5 Avogardo’s constant=6.02 X 1023 mol-1).
2.16g/cm3
5.24g/cm3
7.24g/cm3
6.16g/cm3
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
KF has NaCl structure. If the distance between K+
and F- is 269 pm, find the density of KF (NA= 6.02X1023 mol-1 , atomic masses K=39,F=19 amu )
32.48g/cm3
9.48g/cm3
12.48g/cm3
2.48g/cm3
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Copper crystal has a face-centred cubic lattice structure. Atomic radius of copper atom is 128 pm. Calculate the density of copper. Atomic mass of copper=63.5u.
8.9g/cm3
22.9g/cm3
32.9g/cm3
42.16g/cm3
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calculate the density of silver which crystallizes in a face-centred cubic structure. Two distance between the nearest silver atom in this structure is 287 pm.(molar mass of Ag=107.87 g mol-1,NA=6.02X1023 mol-1).
4.71g/cm3
2.71g/cm3
12.71g/cm3
10.71g/cm3
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