1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The uncertainty in the momentum of an electron is $$2.0 \times 10^{-8} \mathrm{~kg} \mathrm{~ms}^{-1}$$. The uncertainty in its position will be

A
$$2.63 \times 10^{-27} \mathrm{~m}$$
B
$$2.63 \times 10^{-26} \mathrm{~m}$$
C
$$1.73 \times 10^{-27} \mathrm{~m}$$
D
$$2.57 \times 10^{-28} \mathrm{~m}$$
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

A metal has bcc structure and the edge length of its unit cell is $$8 \mathop A\limits^o$$. The volume of the unit cell ( in $$\mathrm{cm}^3$$) will be

A
$$5.12 \times 10^{-22}$$
B
$$5.42 \times 10^{-22}$$
C
$$4.32 \times 10^{-23}$$
D
$$3.89 \times 10^{-24}$$
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

$$\mathrm{MnO}_4^{-}$$ is good oxidising agent in different medium changing to

$$\mathrm{MnO}_4^{-} \rightarrow \mathrm{Mn}^{2+} \rightarrow \mathrm{MnO}_4^{2-} \rightarrow \mathrm{MnO}_2 \rightarrow \mathrm{Mn}_2 \mathrm{O}_3$$

Change in oxidation number respectively are :

A
$$1,3,4,5$$
B
$$5,4,3,2$$
C
$$5,1,3,4$$
D
$$2,6,4,3$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

In the reaction, $$\mathrm{H}_2+\mathrm{I}_2 \rightleftharpoons 2 \mathrm{HI}$$. In a 4L flask, 0.8 mole of each $$\mathrm{H}_2$$ and $$\mathrm{I}_2$$ are taken. All equilibrium, 1 mole of $$\mathrm{HI}$$ is formed. What will be the value of equilibrium constant $$K_C$$ ?

A
11.11
B
24.5
C
20.4
D
1.234
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