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46.

Identify the oxidation  states of Mn, when MnO24 ion undergoes disproportionation reaction under acidic medium


A) +2,+7

B) +2,+5

C) +4,+4

D) +7,+4



47.

What is the correction term in the pressure for real gas in comparison to the ideal gas?


A) \frac{n^{2}}{V^{2}}

B) \frac{aV^{2}}{n^{2}}

C) \frac{an^{2}}{V^{2}}

D) \frac{an^{2}}{V^{}}-nb



48.

How many of the following species are diamagnetic?

He_{2}^{+}, H_{2}^{+}, H_{2}^{-}, He


A) 1

B) 2

C) 3

D) 0



49.

Match the following.

772021146_m1.PNG


A) A:V, B: IV, C:II, D:I

B) A:III, B:IV, C:V,D:II

C) A:IV, B:III, C:II, D:I

D) A:III, B:I, C:V, D:II



50.

From the following energy levels of hydrogen atom, the value of E_{\infty} and E_{3} in J are, respectively

______________   E_{\infty}`=-------------

______________ E_{3} =----------------

______________ E_{2}=-0.545 \times  10^{-18} J

_____________  E_{1}=-2.18 \times 10^{-18} J


A) 1, -0.242 \times 10^{-18}

B) \infty , -0.726 \times 10^{-18}

C) 0, -0.242 \times 10^{-18}

D) 0, -0.321 \times 10^{-18}



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