50
Minutes
30
Questions
1 / -0
Marking
Q1. If the moles of the solute are cancelled out by the total number of moles, the resulting quantity is:
Molality
Molarity
Mole fraction
Percentage by volume
Q2. What is the standard unit of time?
Minute
Hour
Second
Day
Q3. Which law states that equal volumes of gases at the same temperature and pressure should contain equal number of molecules?
Law of definite proportions
Law of multiple proportions
Law of conservation of mass
Avogadro law
Q4. How many moles of water are present in ?
Q5. How many molecules are present in ?
molecules
molecules
molecules
atoms
Q6. If a solution contains (Molar Mass ) dissolved in , what is the number of moles of ?
Q7. If the molality of an aqueous solution is , what is the mass of the solvent (water)?
Q8. The volume of pure water required to have a mass of is: (Density )
Both (2) and (3)
Q9. The relationship used when mixing two solutions (A and B) of the same substance to find the final molarity () and final volume () is:
Q10. What is the molar mass of Copper Sulphate ? (Atomic weight )
Q11. What is the value of divided by Avogadro's number ()?
Q12. In the context of Dalton's theory, the concept that different elements combine in a fixed ratio primarily supports:
Law of Conservation of Mass
Law of Definite Proportions
Avogadro's Law
Law of Multiple Proportions
Q13. Which quantity relates Molecular Weight () to Vapour Density ()?
Q14. If the density of a solution is and the volume is , the mass of the solution calculated in significant figures is:
Q15. The ratio of masses of oxygen which combines with , if forms two oxides, () and (), is . This observation supports which law?
Law of definite proportions
Law of conservation of mass
Law of multiple proportions
Avogadro law
...and 15 more challenging questions available in the interactive simulator.