Q. No.Match Compound/element in Column-I with uses in Column-II and select the best match from the codes given:
Column-I
(Compound/element)
Column-II
(Uses)
A.
Lanthanoid oxide
I.
Petroleum cracking
B.
Lanthanoid
II.
Television screen
C.
Mischmetal
III.
Lanthanoid metal + iron
D.
Mixed oxides of lanthanoids are employed
IV.
Production of iron alloy
Options:
A
B
C
D
1.
II
I
IV
III
2.
I
II
III
IV
3.
II
IV
III
I
4.
IV
I
III
II
(Compound/element)
(Uses)
Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:
| Column I - (Catalyst) | Column II - (Process) | ||
| A. | Ni in the presence of hydrogen | 1. | Contact process |
| B. | Cu2Cl2 | 2. | Vegetable oil to ghee |
| C. | V2O5 | 3. | Sandmeyer reaction |
| D. | Finely divided iron | 4. | Haber's process |
| 5. | Decomposition of KClO3 |
Codes:
| A | B | C | D | |
| 1. | 3 | 4 | 2 | 5 |
| 2. | 2 | 3 | 1 | 4 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Identify the incorrect statement from the following:
| 1. | Zirconium and Hafnium have identical radii of 160 pm and 159 pm, respectively as a consequence of lanthanoid contraction. |
| 2. | Lanthanoids reveal only +3 oxidation state. |
| 3. | The lanthanoid ions other than the f0 type and the f14 type are all paramagnetic. |
| 4. | The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction. |
Match the following aspects with the respective metal.
| Aspects | Metal | ||
| (a) | The metal which reveals the maximum number of oxidation states | (i) | Scandium |
| (b) | The metal although placed in a 3d block is not considered as a transition element | (ii) | Copper |
| (c) | The metal which does not exhibit variable oxidation states | (iii) | Manganese |
| (d) | The metal which in +1 oxidation state in aqueous solution undergoes disproportionation | (iv) | Zinc |
Select the correct option:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iii) | (i) | (iv) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Select the element with the highest second ionization enthalpy from the following options.
1. Mn
2. Fe
3. Cr
4. V
A pair of ions have the same magnetic moment among the following :
1. \(Cu^{2+}, Ti^{3+}\)
2. \( Ti^{3+}, Ni^{2+}\)
3. \( Ti^{4+}, Cu^{2+}\)
4. \( Mn^{2+}, Cu^{2+}\)
The oxo metal anions of the 3d series in which the metal exhibits an oxidation state equal to its group number is /are:
| 1. | 2. | ||
| 3. | 4. | All of these |
| 1. | \((n-1) d^{1-10} n s^{0-2} \) | 2. | \((n-1) d^{1-10} n s^2 \) |
| 3. | \(n f^2~ n p^{1-6} \) | 4. | \(n d^2~ n p^{1-6}\) |
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