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Mdcat-past-papers - NUMS - Chemistry Quiz

Filters: Board: NUMS | Subject: Chemistry |
1. Proton number of ₁₁Na²³ is:



2. One mole of ethanol and one mole of ethane have an equal:



3. The number of moles of CO₂ which contains 16g of oxygen is:



4. Empirical formula is related to molecular formula by:



5. The 1st step in determining empirical formula is:



6. % composition of mass in CO2 is:



7. 0.5 molar solution of NaOH contains:



8. How many moles of CO₂ contain 16g of O₂?



9. Stichiometry is defined as:



10. What is the mass of sulphur in 24.5 g H₂SO₄?



11. From the equation N₂ + 3H₂ → 2NH₃, how many moles of NH₃ are produced from 2.5 moles of N₂?



12. Ca + S → CaS If 2.0g of calcium and 4.0g of sulphur are available for reaction, then the amount of product formed is:



13. Select the greatest number of particles in the following:



14. Half atmospheric pressure is:



15. Pressure remaining constant, at which temperature volume of gas will become twice to be volume at 0°C?



16. 1 calorie is equal to:



17. A gas has a volume of 10dm³ at 10°C. At what temperature the volume of the gas is reduced to half?



18. The values of STP for mole of any ideal gas is:



19. A graph between volume and temperature gives a straight line which cuts the temperature axis at:



20. Which variable mentioned in ideal gas is assumed to be constant in other gas laws?



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