Sindh MDCAT 2019 Paper 121- The colour of transition metal complexes is due to: A. d-d transition of electronsB. Paramagnetic nature of transition elementsC. Loss of s-electronsD. Refraction phenomenon View Answer Answer : A. d-d transition of electrons Description 122- Determine the significant figures in 0.0085: A. 1B. 2C. 3D. 4 View Answer Answer : B. 2 Description 123- Orbitals having same energy are called: A. Hybrid orbitalsB. Degenerate orbitalsC. Valence orbitalsD. Sub-orbitals View Answer Answer : B. Degenerate orbitals Description 125- Copper (Cu, Z=29) is a: A. d’ system with respect to electronic configuration B. d’ system with respect to electronic configurationC. d’ system with respect to electronic configurationD. d¹⁰ system with respect to electronic configuration View Answer Answer : D. d¹⁰ system with respect to electronic configuration Description 126- The carbon number of gasoline is: A. C5 – C6B. C6 – C7 C. C5 – C10D. C12 – C15 View Answer Answer : C. C5 - C10 Description 127- The oxidation number of Br- in Br2 is: A. -2B. -1C. 0D. +1 View Answer Answer : C. 0 Description 128- The number of moles of CO2 which contain 8.0 g of oxygen is: A. 0.25B. 0.50C. 0.75D. 1.0 View Answer Answer : A. 0.25 Description 129- Hydrogen bonds are represented by: A. dative bondsB. full bondC. partial chargesD. dotted bonds View Answer Answer : D. dotted bonds Description 130- Effusion of gases take place through a hole with: A. Hole dimensions B. Infinite dimensionsC. Slit like dimensionsD. Molecular dimensions View Answer Answer : D. Molecular dimensions Description 131- The units of Ksp for the following reaction are: PbCl2 (g) ⇔ Pb+2+ 2Cl-(g) A. mol⁸ dm-⁹ B. mol dm-⁶ C. mol⁷ dm-⁵ D. mol dm-⁹ View Answer Answer : A. mol⁸ dm-⁹ Description 132- In t-butyl alcohol, the tertiary carbon is bonded to: A. No H-atomsB. One H-atomsC. Three H-atomsD. Four C-atoms View Answer Answer : A. No H-atoms Description 133- The standard reduction potential of hydrogen electrode is: A. -0.76 voltsB. 0.00 voltsC. +1.5 voltsD. 1.0 volts View Answer Answer : B. 0.00 volts Description 134- Down's cell is used to prepare: A. Sodium carbonateB. Sodium bicarbonate C. Sodium hydroxideD. Sodium metal View Answer Answer : D. Sodium metal Description 135- Which of the hydrogen compounds has the highest percentage of ionic character? A. HClB. HBrC. HID. HF View Answer Answer : D. HF Description 136- Quantum number values for 2p orbitals are: A. n=2 l=1B. n=2 l=2 C. n=2 l=0 D. n=1 l=0 View Answer Answer : A. n=2 l=1 Description 137- Solubility product of AgCl is 2.0x10^-10 mol^-4 dm^-6. Maximum concentration of Ag^+ ions in the solution is: A. 2.0×10^-12 mol dm^-3B. 1.4×10^-12 mol dm^-3 C. 1.0×10^-12 mol dm^-3 D. 2.5×10^-10 mol dm^-3 View Answer Answer : D. 2.5x10^-10 mol dm^-3 Description 138- A limiting reactant is the one, which: A. is taken in lesser quantity in grams as compared to the other reactantB. Is taken in lesser quantity in volume as compared to the other reactant C. gives the minimum amount of the product which is requiredD. gives equal amount of the reactants and products View Answer Answer : C. gives the minimum amount of the product which is required Description 139- The chemical formula of Tincal is: A. Na_2B_4O_7·10H_2OB. Na_2B_4O_7·10H_2OC. Na_2B_4O_7·H_2OD. Na_2B_4O_5·10H_2O View Answer Answer : A. Na_2B_4O_7·10H_2O Description 140- Hydrogen resembles with the elements of groups: A. I-A, V-A and VIII-A B. I-A, IV-A and VI-AC. I-A, II-A and VII-AD. I-A, IV-A and VII-A View Answer Answer : D. I-A, IV-A and VII-A Description 1 2 3 4 5 6 7 8 9 10
