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1
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which statement from following about nano-material is NOT correct?

A
As the particle size decreases the total surface area of particles increases.
B
Nano-material based catalysts exhibit increased catalytic activities.
C
Nano-sized Cu and Pd clusters have very less hardness than bulk metal.
D
Carbon nano-tube can act as electrical conductor.
2
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Find the radius of metal atom in bcc unit cell having edge length $$450 \mathrm{~pm}$$.

A
$$225.04 \mathrm{~pm}$$
B
$$194.85 \mathrm{~pm}$$
C
$$159.08 \mathrm{~pm}$$
D
$$90.05 \mathrm{~pm}$$
3
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the volume of unit cell if an element having molar mass $$180 \mathrm{~g} \mathrm{~mol}^{-1}$$ forms fcc unit cell. $$\left[\rho \cdot N_A=120 \times 10^{21} \mathrm{~g} \mathrm{~cm}^{-3} \mathrm{~mol}^{-1}\right]$$

A
$$6.00 \times 10^{-21} \mathrm{~cm}^3$$
B
$$5.00 \times 10^{-21} \mathrm{~cm}^3$$
C
$$4.00 \times 10^{-21} \mathrm{~cm}^3$$
D
$$7.00 \times 10^{-21} \mathrm{~cm}^3$$
4
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which from following metal has hcp crystal structure?

A
Cu
B
Zn
C
Ag
D
Po
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