D & F Block Elements DPP 01 Solution Notes (Parishram 2023) PDF

# PARISHRAM ## The d and f- Block Elements DPP 01 (Discussion) **By: Ashima Gupta** **Physics Walla** ### Q. 1 Transition elements belong to 1. s-block 2. p-block 3. **d-block** 4. f-block ### Q. 2 The general electronic configuration of transition elements is 1. (n-1)d^1-5 2. (n-1)d<s...

# PARISHRAM ## The d and f- Block Elements DPP 01 (Discussion) **By: Ashima Gupta** **Physics Walla** ### Q. 1 Transition elements belong to 1. s-block 2. p-block 3. **d-block** 4. f-block ### Q. 2 The general electronic configuration of transition elements is 1. (n-1)d^1-5 2. (n-1)d^1-10 n¹ 3. **(n-1)d^1-10 n^0-2** 4. np^1-6 n² **d-block** **(General E.C -> (n-1)d^1-10 n^0-2)** **(n = 4 to 7)** ### Q. 3 The number of unpaired electrons in Fe³⁺ (Z=26) are 1. 4 2. **5** 3. 6 4. 3 **₂₆Fe : [Ar]¹⁸ 3d⁶4s²** **₂₆Fe³⁺ : [Ar]¹⁸ 3d⁵** **↑ ↑ ↑ ↑ ↑** **5 unpaired e^-** ### Q. 4 The most abundant transition metal belongs to 1. **3d series** 2. 4d series 3. 5d series 4. 6d series **Iron (Fe) Z=26 3d series** ### Q. 5 Anomalous electronic configuration in the 3d series are of 1. Cr and Fe 2. Cu and Zn 3. Fe and Cu 4. **Cr and Cu** **3d series (₂₁Sc to ₃₀Zn)** **₂₄Cr : [Ar]¹⁸ 3d⁵ 4s¹** **₂₉Cu : [Ar]¹⁸ 3d¹⁰ 4s¹** ### Q. 6 Which of the following are d-block elements but not regarded as transition elements? 1. Cu, Ag, Au 2. **Zn, Cd, Hg,** 3. Fe, Co, Ni 4. Ru, Rh, Pd **Pseudo Transition elements.** ### Q. 7 The pair that has similar atomic radii is 1. Mn and Re 2. **Ti and Hf** 3. Se and Ni 4. Mo and W **In a d-series** **Left to Right: Size first increases, then becomes constant in the middle and then increases in the last.** **In a Group (d-block)** | 3d size ↑ | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | ----------- | | 3d | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | | 4d | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | | 5d | La | Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg | **3d size: Almost constant** **(Except gp3)** **5d size: Almost constant** ### Q. 8 The transition element with the lowest atomic number is 1. **Scandium (Z = 21)** 2. Titanium (Z=22) 3. Zinc (Z = 30) 4. Lanthanum (Z = 57) ### Q. 9 Which of the following is not an element of the first transition series? 1. Iron 2. Chromium 3. **Magnesium** 4. Nickel **(1^st transition series (3d-series))** **Sc Ti V Cr Mn Fe Co Ni Cu Zn** **(s-block (gp2))** ### Q. 10 Which of the following pairs of ions have the same electronic configuration? 1. Cu²⁺, Cr²⁺ 2. **Fe³⁺, Mn²⁺** 3. Co³⁺, Ni³⁺ 4. Sc³⁺, Cr³⁺ **₂₉Cu²⁺ : 3d⁹** **₂₅Mn²⁺ : 3d⁵** **₂₆Fe³⁺ : 3d⁵** **₂₄Cr²⁺ : 3d⁴** **₂₇Co³⁺ : 3d⁶** **₂₈Ni³⁺ : 3d⁷** **₂₁Sc³⁺: [Ar] ¹⁸** **₂₇Co³⁺: 3d³** # THANKYOU