Sure, here are some of the important laws in Chemistry covered in NIOS class 11 and 12:

1. Law of Conservation of Mass: This law states that mass can neither be created nor destroyed in a chemical reaction.

2. Law of Definite Proportions: This law states that a chemical compound always contains exactly the same proportion of elements by mass.

3. Law of Multiple Proportions: This law states that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

4. Avogadro's Law: This law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

5. Gay-Lussac's Law: This law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant.

6. Boyle's Law: This law states that the pressure and volume of a gas have an inverse relationship when temperature is held constant.

7. Charles's Law: This law states that the volume of a given mass of a gas is directly proportional to its temperature on a Kelvin scale when the pressure is kept constant.

8. Dalton's Law of Partial Pressures: This law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of individual gases.

9. Hess's Law: This law states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps.

10. Law of Mass Action: This law states that the rate of a chemical reaction is directly proportional to the product of the molar concentrations of the reactants, each raised to the power equal to the stoichiometric coefficient in the balanced chemical equation.

These are some of the fundamental laws in Chemistry that you would need to know for your NIOS class 11 and 12 studies.

Question

Sure, here are some of the important laws in Chemistry covered in NIOS class 11 and 12:

1. Law of Conservation of Mass: This law states that mass can neither be created nor destroyed in a chemical reaction.

2. Law of Definite Proportions: This law states that a chemical compound always contains exactly the same proportion of elements by mass.

3. Law of Multiple Proportions: This law states that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

4. Avogadro's Law: This law states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

5. Gay-Lussac's Law: This law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant.

6. Boyle's Law: This law states that the pressure and volume of a gas have an inverse relationship when temperature is held constant.

7. Charles's Law: This law states that the volume of a given mass of a gas is directly proportional to its temperature on a Kelvin scale when the pressure is kept constant.

8. Dalton's Law of Partial Pressures: This law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of individual gases.

9. Hess's Law: This law states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps.

10. Law of Mass Action: This law states that the rate of a chemical reaction is directly proportional to the product of the molar concentrations of the reactants, each raised to the power equal to the stoichiometric coefficient in the balanced chemical equation.

These are some of the fundamental laws in Chemistry that you would need to know for your NIOS class 11 and 12 studies.

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