An example of a sigma bonded organometallic compound is:
1.
Grignard's reagent
2.
Ferrocene
3.
Cobaltocene
4.
Ruthenocene
A first-order reaction has a specific reaction rate of
10–2 sec–1. How much time will it take for 20 g of the reactant to reduce to 5 g?
| 1. | 138.6 sec | 2. | 346.5 sec |
| 3. | 693.0 sec | 4. | 238.6 sec |
| Column-I | Column-II | ||
| (A) | XX’ | (i) | T-shape |
| (B) | XX’3 | (ii) | Pentagonal bipyramidal |
| (C) | XX’5 | (iii) | Linear |
| (D) | XX’7 | (iv) | Square Pyramidal |
| (A) | (B) | (C) | (D) | |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (i) | (iv) | (iii) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iii) | (iv) | (i) | (ii) |
The concentration of Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 × 10–4 mol L–1.
The solubility product of Ag2C2O4 is:
| 1. | 2.66×10–12 | 2. | 4.5×10–11 |
| 3. | 5.3×10–12 | 4. | 2.42×10–8 |
Consider the given cell:
\(\mathrm{Z n \left|\right. Z n S O_{4} \left(\right. 0 . 01 M \left.\right) \left|\right. \left|\right. C u S O_{4} \left(\right. 1 . 0 M \left.\right) \left|\right. C u}\)
In the electrochemical cell, the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 is changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2 ?
(Given: \(\frac{RT}{F}\) = 0.059)
| 1. | \(\mathrm{E_{1} < E_{2}}\) | 2. | \(\mathrm{E_{1} > E_{2}}\) |
| 3. | \(\mathrm{E_{2} = 0 \neq E_{1}}\) | 4. | \(\mathrm{E_{1} = E_{2}}\) |
Choose the pairs of isoelectronic compounds which are isostructural:
1. TeF2, XeF2
2. IBr2-, XeF2
3. IF3, XeF2
4. BeCl2, XeF2
The IUPAC name of the given compound is:
1. 3-keto-2-methylhex-4-enal
2. 5-formylhex-2-en-3-one
3. 5-methyl-4-2-en-5-el
4. 3-keto-2-methylhex-5-enal
Incorrect statement among the following is:
| 1. | The uncertainty principle is\(\Delta x \cdot \Delta p \geq \dfrac{h}{4 \pi} \) |
| 2. | Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry, and a more balanced arrangement. |
| 3. | The energy of the 2s orbital is less than the energy of the 2p orbital in the case of hydrogen-like atoms. |
| 4. | De-Broglie's wavelength is given by\(\lambda=\dfrac{h}{m v} \), where m= mass of the particle, v = group velocity of the particle. |
The incorrect statement among the following is -
| 1. | Density decreases in case of crystals with Schottky's defect. |
| 2. | NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal. |
| 3. | Frenkel defect is favoured in those ionic compounds in which sizes of cations and anions have large difference. |
| 4. | \(Fe_{0.98}O\) has non stoichiometric metal excess defect. |
| 1. | \(\mathrm{{SF}_6}\) | 2. | \(\mathrm{NCl_3}\) |
| 3. | \(\mathrm{BCl_3}\) | 4. | \(\mathrm{PH_3}\) |
© 2026 GoodEd Technologies Pvt. Ltd.