d and f Block Elements · Chemistry · AP EAPCET
MCQ (Single Correct Answer)
Identify the ion (hydrated in solution) which is not correctly matched with its spin only magnetic moment (in BM) given in brackets
Which one of the following statements is not correct?
How many of the following lanthanide elements exhibit +4 oxidation state?
Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy
$$ \text { Match the following } $$
| $$ \text { List-I (Aquated ion) } $$ |
$$ \text { List-II (Colour) } $$ |
||
|---|---|---|---|
| (A) | $\mathrm{Ni}^{2+}$ | (I) | Violet |
| (B) | $\mathrm{Fe}^{3+}$ | (II) | Blue |
| (C) | $\mathrm{Mn}^{3+}$ | (III) | Yellow |
| (D) | $\mathrm{V}^{4+}$ | (IV) | Red |
| (V) | Green | ||
Correct answer is
The ion with $4 f^7$ configuration is
The correct order of oxidising power of the given ions is
| List I | List II |
| A. Technicium | I. Non-metal |
| B. Fluorine | II. Transition metal |
| C. Tellurium | III. Lanthanoid |
| D. Dysprosium | IV. Metalloid |
Identify the isoelectronic pair of ions from the following.
Assertion (A) Transition metals and their complexes show catalytic activity.
Reason (R) The activation energy of a reaction is lowered by the catalyst.
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
Match the following columns and choose the correct code.
| Column I (Property) |
Column II (Metal) |
||
|---|---|---|---|
| A. | Element with highest second ionisation enthalpy $$(\Delta_i H_2)$$ | 1. | CO |
| B. | Element with highest third ionisation enthalpy $$(\Delta_i H_3)$$ | 2. | Cr |
| C. | M in [M(CO)$$_6$$] | 3. | Cu |
| D. | Element with highest heat of atomisation $$(\Delta_a H)$$ | 4. | Zn |
| 5. | Ni |
Which of the following is not arranged in the correct sequence?
Which among the following is coloured?
The electronic configuration of $$\mathrm{Fe}^{3+}$$ is (atomic number of $$\mathrm{Fe}=26$$ )
The magnetic moment of Fe$$^{2+}$$ is ........ BM.
Which of the following statement is not correct?
To which group of the periodic table does an element having electronic configuration [Ar] 3d$$^5$$ 4s$$^2$$ belong?