NUMS MDCAT 2023 PAPER NUMS PAPER 2023 ( PART 12 ) 1. Vapour pressure is independent of which factor Temperature Intermolecular forces Surface area of liquid Density of liquid 2. The boiling point of ether is less as compared to alcohols and phenols due to: Isomerism Intermolecular forces Nature of alkyl group Functional group 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 Each sodium ion is surrounded by 3 chloride ions and each chloride ion is surrounded by 3 sodium ions 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 5. The greater lattice energy is shown by: NaI NaCl NaF NaBr 6. Thermal conductivity of metals is due to: Layered structure of metals Vibrational movement of metals Loosely held metal ions Freely moving electrons 7. The high pressure of 200 atm in Haber’s process is used for Lower yields Better yields Cost decrease Lower rate 8. By which of the following factor equilibrium factor is achieved earlier: Concentration Temperature Catalyst Pressure 9. When temperature of reacting gases is raised by 10K,the reaction rate will increase to: Four times Five times Three times Double 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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