1
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which from following combinations is an example for construction of n-type semiconductor?

A
Si doped with B
B
Si doped with $$\mathrm{P}$$
C
Si doped with $$\mathrm{Ga}$$
D
Si doped with In
2
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the density of metal having molar mass $$210 \mathrm{~g} \mathrm{~mol}^{-1}$$ that forms simple cubic unit cell. $$\left(\mathrm{a}^3 \cdot \mathrm{N}_{\mathrm{A}}=21.5 \mathrm{~cm}^3 \mathrm{~mol}^{-1}\right)$$

A
$$9.77 \mathrm{~g} \mathrm{~cm}^{-3}$$
B
$$7.15 \mathrm{~g} \mathrm{~cm}^{-3}$$
C
$$8.12 \mathrm{~g} \mathrm{~cm}^{-3}$$
D
$$6.94 \mathrm{~g} \mathrm{~cm}^{-3}$$
3
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which element from following rapidly loses its luster in air and tarnishes?

A
$$\mathrm{Ba}$$
B
$$\mathrm{Be}$$
C
$$\mathrm{K}$$
D
$$\mathrm{Mg}$$
4
MHT CET 2023 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A neon-dioxygen mixture contains $$64 \mathrm{~g} \mathrm{~O}_2$$ and $$160 \mathrm{~g} \mathrm{~Ne}$$. If the total pressure is $$25 \mathrm{~bar}$$, calculate the partial pressure of dioxygen.

A
5 bar
B
7.5 bar
C
10 bar
D
20 bar
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