1
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which transition metal does not form 'MO' type oxide? ( $M=$ transition metal)
A
$V$
B
Cr
C
Mn
D
Sc
2
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the isoelectronic pair of ions from the following.

A
$$\mathrm{Pr}^{3+}, \mathrm{Nd}^{3+}$$
B
$$\mathrm{Tb}^{3+}, \mathrm{Dy}^{2+}$$
C
$$\mathrm{Eu}^{2+}, \mathrm{Gd}^{3+}$$
D
$$\mathrm{Pr}^{3+}, \mathrm{Ce}^{4+}$$
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Assertion (A) Transition metals and their complexes show catalytic activity.

Reason (R) The activation energy of a reaction is lowered by the catalyst.

A
Both A and R are correct and R is the correct explanation of A.
B
Both A and R are correct but R is not the correct explanation of A.
C
A is correct but R is incorrect.
D
A is incorrect but R is correct.
4
AP EAPCET 2021 - 20th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

A purple coloured compound of manganese $$(X)$$ decomposes on heating to liberate oxygen and forms compounds of manganese $$Y$$ and $$Z$$. Compound $$Z$$ reacts with $$\mathrm{KOH}$$ in presence of potassium nitrate to give compound $$Y$$. Compounds $$X, Y$$ and $$Z$$ respectively are

A
$$X-\mathrm{KMnO}_4, Y-\mathrm{Mn}_2 \mathrm{O}_7, Z-\mathrm{MnO}_2$$
B
$$X-\mathrm{K}_2 \mathrm{MnO}_4, Y-\mathrm{KMnO}_4, Z-\mathrm{Mn}_2 \mathrm{O}_7$$
C
$$X-\mathrm{KMnO}_4, Y-\mathrm{K}_2 \mathrm{MnO}_4, Z-\mathrm{MnO}_2$$
D
$$\mathrm{X}-\mathrm{KMnO}_4, \mathrm{Y}-\mathrm{MnO}_2 . Z-\mathrm{MnO}$$

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