NUMS MDCAT 2023 PAPER NUMS PAPER 2023 ( PART 12 ) 1. Vapour pressure is independent of which factor Density of liquid Surface area of liquid Temperature Intermolecular forces 2. The boiling point of ether is less as compared to alcohols and phenols due to: Intermolecular forces Nature of alkyl group Functional group Isomerism 3. When two ice cubes are pressed over each other they unite to form one cube due to: Dipole _ Dipole attraction Van der waal’s forces H – bonding Covalent attraction 4. Which statement correctly describes the structure of sodium chloride crystal Inter molecular forces are present between two oppositely charge ions Each sodium ion is surrounded by six chloride ions and and each chloride ion is surrounded by six sodium ion The crystal is face centered cubic structure Each sodium ion is surrounded by 3 chloride ions and each chloride ion is surrounded by 3 sodium ions 5. The greater lattice energy is shown by: NaF NaBr NaCl NaI 6. Thermal conductivity of metals is due to: Loosely held metal ions Freely moving electrons Vibrational movement of metals Layered structure of metals 7. The high pressure of 200 atm in Haber’s process is used for Better yields Lower rate Lower yields Cost decrease 8. By which of the following factor equilibrium factor is achieved earlier: Catalyst Temperature Concentration Pressure 9. When temperature of reacting gases is raised by 10K,the reaction rate will increase to: Five times Double Three times Four times 10. The minimum amount of energy required by the colliding particle for effective collision is called: Activation energy Hydration energy Bond energy Lattice energy Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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