Chemistry - Mole Concept Question with Solution | TestHub
The following statements are given for different laws of chemical combination. Which of the following statement(s) is/are correct?
1. Gay-Lussac's law of gaseous volumes is valid only for ideal gases under all conditions.
2. The law of conservation of mass is valid only for reactions carried out in a closed container and not in an open container.
3. The same volume of nitrogen at STP combines with two different volumes of oxygen at STP to form NO₂ and N₂O₄.
4. A fixed mass of iron can combine with different masses of oxygen under different conditions.
Options:
Answer:
Solution:
* Gay-Lussac's law is valid for ideal gases at constant temperature and pressure.
* The law of conservation of mass is applicable for all reactions except nuclear reactions.
* In the case of NO₂ and N₂O₄, the same volume of nitrogen will react with the same volume of oxygen.
* Iron can form FeO or Fe₂O₃, which are different oxides. Therefore, the same mass of iron reacts with different masses of oxygen.
