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Types of Hydrogen Bonding

Which one of ...

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Which one of the given ions is most stable in aqueous medium? 1.Mn^{3+} 2.Cr^{3+} 3.V^{3+} 4.Ti^{3+

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Q. Assertion :The number of unpaired electrons in the following gaseous ions:

M n^{3 +}, C r^{3 +}, V^{3 +}

T i^{3 +}

are 4, 3, 2 and 1 respectively. Reason: Among these Cr

^{3 +}

is most stable in aqueous solution.

Which one of the following ions is the most stable in aqueous solution?
(Atomic number. Ti = 22, V = 23, Cr = 24, Mn = 25)

Q. The number of unpaired electrons in gaseous species of

M n^{3 +}

C r^{3 +}

V^{3 +}

are ____________ respectively and the most stable species is ______.

Q. (a) Following are the transition metal ions of 3d series:

T i^{4 +}, V^{2 +}, M n^{3 +}, C r^{3 +}

(Atomic numbers : Ti = 22, V = 23, Mn = 25, Cr = 24)
Answer the following:
(i) Which ion is most stable in an aqueous solution and why?
(ii) Which ion is a strong oxidising agent and why?
(iii) Which ion is colourless and why?
(b) Complete the following equations:

(i) 2 M n O_{4}^{-} + 16 H^{+} + 5 S^{2 -} \to (i i) K M n O_{4} H e a t - -- \to

Q. Following are the transition metal ions of

3 d

T i^{4 +}, V^{2 +}, M n^{3 +}, C r^{3 +}

(Atomic numbers:

T i = 22, V = 23, M n = 25, C r = 24)

Answer the following:

(i) Which ion is most stable in an aqueous solution and why?
(ii) Which ion is a strong oxidising agent and why?
(iii) Which ion is colourless and why?

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