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1
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following ions will exhibit colour in aqueous solution?

A

$\mathrm{La}^{+3}(Z=57)$

B

$\mathrm{Ti}^{3+}(\mathrm{Z}=22)$

C

$\mathrm{Lu}^{3+}(Z=71)$

D

$\mathrm{Sc}^{3+}(Z=21)$

2
TS EAMCET 2020 (Online) 11th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

What is the oxidation state of Cr , when the pH of the aqueous solution of potassium dichromate changes from acidic to basic?

A

+5

B

+4

C

+6

D

+3

3
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The highest oxidation state observed in first row transition metals is

A

+6

B

+7

C

+8

D

+9

4
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Among the following series of transition metal ions, the one in which all the metal ions have $3 d^2, 3 p^6$ electronic configuration is

(Atomic number, $\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24$, $\mathrm{Mn}=25$ )

A

$\mathrm{Ti}^{3+}, \mathrm{V}^{2+}, \mathrm{Cr}^{3+}$ and $\mathrm{Mn}^{4+}$

B

$\mathrm{Ti}^{+}, \mathrm{V}^{4+}, \mathrm{Cr}^{6+}$ and $\mathrm{Mn}^{7+}$

C

$\mathrm{Ti}^{4+}, \mathrm{V}^{3+}, \mathrm{Cr}^{2+}$ and $\mathrm{Mn}^{3+}$

D

$\mathrm{Ti}^{2+}, \mathrm{V}^{3+}, \mathrm{Cr}^{4+}$ and $\mathrm{Mn}^{5+}$

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