1
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

What type of crystal structure from following has 52.36% packing efficiency?

A
FCC
B
BCC
C
Hexagonal cubic
D
Simple cubic
2
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

An element (molar mass 180 ) has BCC crystal structure with density $$18 \mathrm{~g} \mathrm{~cm}^{-3}$$. What is the edge length of unit cell?

A
$$\sqrt[3]{23.2} \times 10^{-24} \mathrm{~cm}$$
B
$$\sqrt[3]{12.6} \times 10^{-24} \mathrm{~cm}$$
C
$$\sqrt[3]{33.2} \times 10^{-8} \mathrm{~cm}$$
D
$$\sqrt[3]{22.6} \times 10^{-8} \mathrm{~cm}$$
3
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

An element crystallises in fcc type of unit cell. The volume of one unit cell is $24.99 \times 10^{-24} \mathrm{~cm}^3$ and density of the element $7.2 \mathrm{~g} \mathrm{~cm}^{-3}$. Calculate the number of unit cells in 36 g of pure sample of element?

A
$2.0 \times 10^{23}$
B
$1.25 \times 10^{21}$
C
$2.0 \times 10^{21}$
D
$2.0 \times 10^{24}$
4
MHT CET 2020 19th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the percentage of unoccupied space in fcc unit cell?

A
$74 \%$
B
$68 \%$
C
$32 \%$
D
$26 \%$
MHT CET Subjects
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12