Daily homework · 5 questions a day
MH HSC Class 12 Chemistry daily homework
Maharashtra HSC Class 12 Chemistry board questions, 2014 to 2026, five a day. Questions the board asked again come first, highest count first, then the question types it keeps asking, then every other question.
Questions the board asked again
Days 1 to 18. Each printed once, in its latest wording, highest count first.
- 1.Aldehydes, Ketones and Carboxylic Acidsasked 4×
- 2.Elements of Groups 16, 17 and 18asked 4×
- 3.Chemical Thermodynamicsasked 4×
- 4.Aldehydes, Ketones and Carboxylic Acidsasked 4×
- 5.Chemical Thermodynamicsasked 4×
- 1.Transition and Inner Transition Elementsasked 4×
- 2.Chemical Kineticsasked 4×
- 3.Chemical Kineticsasked 3×
- 4.Chemical Kineticsasked 3×
- 5.Coordination Compoundsasked 3×
- 1.Halogen Derivativesasked 3×
- 2.Aminesasked 3×
- 3.Biomoleculesasked 3×
- 4.Electrochemistryasked 3×
- 5.Elements of Groups 16, 17 and 18asked 3×
- 1.Green Chemistry and Nanochemistryasked 3×
- 2.Solutionsasked 3×
- 3.Biomoleculesasked 3×
- 4.Alcohols, Phenols and Ethersasked 3×
- 5.Transition and Inner Transition Elementsasked 3×
- 1.Aldehydes, Ketones and Carboxylic Acidsasked 3×
- 2.Aldehydes, Ketones and Carboxylic Acidsasked 3×
- 3.Biomoleculesasked 3×
- 4.Coordination Compoundsasked 3×
- 5.Electrochemistryasked 3×
- 1.Solutionsasked 3×
- 2.Alcohols, Phenols and Ethersasked 2×
- 3.Aldehydes, Ketones and Carboxylic Acidsasked 2×
- 4.Aldehydes, Ketones and Carboxylic Acidsasked 2×
- 5.Aminesasked 2×
- 1.Biomoleculesasked 2×
- 2.Chemical Thermodynamicsasked 2×
- 3.Chemical Thermodynamicsasked 2×
- 4.Coordination Compoundsasked 2×
- 5.Coordination Compoundsasked 2×
- 1.Electrochemistryasked 2×
- 2.Elements of Groups 16, 17 and 18asked 2×
- 3.Elements of Groups 16, 17 and 18asked 2×
- 4.Green Chemistry and Nanochemistryasked 2×
- 5.Green Chemistry and Nanochemistryasked 2×
- 1.Introduction to Polymer Chemistryasked 2×
- 2.Ionic Equilibriaasked 2×
- 3.Solid Stateasked 2×
- 4.Solid Stateasked 2×
- 5.Solutionsasked 2×
- 1.Transition and Inner Transition Elementsasked 2×
- 2.Transition and Inner Transition Elementsasked 2×
- 3.Transition and Inner Transition Elementsasked 2×
- 4.Aminesasked 2×
- 5.Chemical Thermodynamicsasked 2×
- 1.Coordination Compoundsasked 2×
- 2.Electrochemistryasked 2×
- 3.Green Chemistry and Nanochemistryasked 2×
- 4.Green Chemistry and Nanochemistryasked 2×
- 5.Green Chemistry and Nanochemistryasked 2×
- 1.Halogen Derivativesasked 2×
- 2.Introduction to Polymer Chemistryasked 2×
- 3.Ionic Equilibriaasked 2×
- 4.Ionic Equilibriaasked 2×
- 5.Solutionsasked 2×
- 1.Alcohols, Phenols and Ethersasked 2×
- 2.Chemical Kineticsasked 2×
- 3.Coordination Compoundsasked 2×
- 4.Electrochemistryasked 2×
- 5.Electrochemistryasked 2×
- 1.Elements of Groups 16, 17 and 18asked 2×
- 2.Solid Stateasked 2×
- 3.Solid Stateasked 2×
- 4.Solutionsasked 2×
- 5.Solutionsasked 2×
- 1.Transition and Inner Transition Elementsasked 2×
- 2.Biomoleculesasked 2×
- 3.Alcohols, Phenols and Ethersasked 2×
- 4.Biomoleculesasked 2×
- 5.Chemical Thermodynamicsasked 2×
- 1.Solutionsasked 2×
- 2.Solutionsasked 2×
- 3.Chemical Thermodynamicsasked 2×
- 4.Solutionsasked 2×
- 5.Transition and Inner Transition Elementsasked 2×
- 1.Chemical Thermodynamicsasked 2×
- 2.Alcohols, Phenols and Ethersasked 2×
- 3.Chemical Kineticsasked 2×
- 4.Coordination Compoundsasked 2×
- 5.Halogen Derivativesasked 2×
- 1.Aminesasked 2×
- 2.Transition and Inner Transition Elementsasked 2×
- 3.Electrochemistrytype asked 7×
- 4.Ionic Equilibriatype asked 6×
- 5.Introduction to Polymer Chemistrytype asked 6×
Question types the board keeps asking
Days 19 to 39. One example of each type, with how often the type was asked.
- 1.Introduction to Polymer Chemistrytype asked 6×
- 2.Chemical Kineticstype asked 5×
- 3.Coordination Compoundstype asked 5×
- 4.Coordination Compoundstype asked 5×
- 5.Transition and Inner Transition Elementstype asked 5×
- 1.Transition and Inner Transition Elementstype asked 5×
- 2.Alcohols, Phenols and Etherstype asked 5×
- 3.Solid Statetype asked 5×
- 4.Coordination Compoundstype asked 5×
- 5.Aldehydes, Ketones and Carboxylic Acidstype asked 4×
- 1.Aminestype asked 4×
- 2.Chemical Thermodynamicstype asked 4×
- 3.Chemical Thermodynamicstype asked 4×
- 4.Green Chemistry and Nanochemistrytype asked 4×
- 5.Halogen Derivativestype asked 4×
- 1.Ionic Equilibriatype asked 4×
- 2.Solid Statetype asked 4×
- 3.Chemical Thermodynamicstype asked 4×
- 4.Electrochemistrytype asked 4×
- 5.Elements of Groups 16, 17 and 18type asked 4×
- 1.Halogen Derivativestype asked 4×
- 2.Ionic Equilibriatype asked 4×
- 3.Chemical Thermodynamicstype asked 4×
- 4.Elements of Groups 16, 17 and 18type asked 4×
- 5.Halogen Derivativestype asked 4×
- 1.Introduction to Polymer Chemistrytype asked 4×
- 2.Chemical Thermodynamicstype asked 4×
- 3.Electrochemistrytype asked 4×
- 4.Aminestype asked 3×
- 5.Biomoleculestype asked 3×
- 1.Biomoleculestype asked 3×
- 2.Chemical Kineticstype asked 3×
- 3.Electrochemistrytype asked 3×
- 4.Electrochemistrytype asked 3×
- 5.Elements of Groups 16, 17 and 18type asked 3×
- 1.Introduction to Polymer Chemistrytype asked 3×
- 2.Ionic Equilibriatype asked 3×
- 3.Solutionstype asked 3×
- 4.Alcohols, Phenols and Etherstype asked 3×
- 5.Aldehydes, Ketones and Carboxylic Acidstype asked 3×
- 1.Aminestype asked 3×
- 2.Biomoleculestype asked 3×
- 3.Chemical Kineticstype asked 3×
- 4.Chemical Kineticstype asked 3×
- 5.Chemical Thermodynamicstype asked 3×
- 1.Coordination Compoundstype asked 3×
- 2.Elements of Groups 16, 17 and 18type asked 3×
- 3.Solid Statetype asked 3×
- 4.Solutionstype asked 3×
- 5.Aldehydes, Ketones and Carboxylic Acidstype asked 3×
- 1.Chemical Thermodynamicstype asked 3×
- 2.Chemical Kineticstype asked 3×
- 3.Transition and Inner Transition Elementstype asked 3×
- 4.Aminestype asked 3×
- 5.Halogen Derivativestype asked 3×
- 1.Alcohols, Phenols and Etherstype asked 3×
- 2.Solid Statetype asked 3×
- 3.Alcohols, Phenols and Etherstype asked 2×
- 4.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 5.Coordination Compoundstype asked 2×
- 1.Solid Statetype asked 2×
- 2.Solutionstype asked 2×
- 3.Transition and Inner Transition Elementstype asked 2×
- 4.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 5.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 1.Chemical Kineticstype asked 2×
- 2.Chemical Kineticstype asked 2×
- 3.Halogen Derivativestype asked 2×
- 4.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 5.Aminestype asked 2×
- 1.Biomoleculestype asked 2×
- 2.Coordination Compoundstype asked 2×
- 3.Green Chemistry and Nanochemistrytype asked 2×
- 4.Halogen Derivativestype asked 2×
- 5.Halogen Derivativestype asked 2×
- 1.Solid Statetype asked 2×
- 2.Transition and Inner Transition Elementstype asked 2×
- 3.Alcohols, Phenols and Etherstype asked 2×
- 4.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 5.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 1.Aminestype asked 2×
- 2.Aminestype asked 2×
- 3.Chemical Thermodynamicstype asked 2×
- 4.Coordination Compoundstype asked 2×
- 5.Electrochemistrytype asked 2×
- 1.Elements of Groups 16, 17 and 18type asked 2×
- 2.Transition and Inner Transition Elementstype asked 2×
- 3.Chemical Thermodynamicstype asked 2×
- 4.Elements of Groups 16, 17 and 18type asked 2×
- 5.Solutionstype asked 2×
- 1.Solutionstype asked 2×
- 2.Chemical Thermodynamicstype asked 2×
- 3.Aldehydes, Ketones and Carboxylic Acidstype asked 2×
- 4.Chemical Kineticstype asked 2×
- 5.Electrochemistrytype asked 2×
- 1.Solutionstype asked 2×
- 2.Elements of Groups 16, 17 and 18type asked 2×
- 3.Solid Statetype asked 2×
- 4.Transition and Inner Transition Elementstype asked 2×
- 5.Transition and Inner Transition Elementstype asked 2×
- 1.Alcohols, Phenols and Etherstype asked 2×
- 2.Solutionstype asked 2×
- 3.Transition and Inner Transition Elementstype asked 2×
- 4.Electrochemistryasked once
- 5.Ionic Equilibriaasked once
Questions asked once
Days 40 to 100. Every other question from the papers.
- 1.Introduction to Polymer Chemistryasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Chemical Kineticsasked once
- 4.Coordination Compoundsasked once
- 5.Coordination Compoundsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Transition and Inner Transition Elementsasked once
- 3.Alcohols, Phenols and Ethersasked once
- 4.Solid Stateasked once
- 5.Coordination Compoundsasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Aminesasked once
- 3.Chemical Thermodynamicsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Green Chemistry and Nanochemistryasked once
- 1.Halogen Derivativesasked once
- 2.Ionic Equilibriaasked once
- 3.Solid Stateasked once
- 4.Chemical Thermodynamicsasked once
- 5.Electrochemistryasked once
- 1.Elements of Groups 16, 17 and 18asked once
- 2.Halogen Derivativesasked once
- 3.Ionic Equilibriaasked once
- 4.Chemical Thermodynamicsasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Halogen Derivativesasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Chemical Thermodynamicsasked once
- 4.Electrochemistryasked once
- 5.Aminesasked once
- 1.Biomoleculesasked once
- 2.Chemical Kineticsasked once
- 3.Electrochemistryasked once
- 4.Electrochemistryasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Ionic Equilibriaasked once
- 3.Solutionsasked once
- 4.Alcohols, Phenols and Ethersasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Aminesasked once
- 2.Biomoleculesasked once
- 3.Chemical Kineticsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Coordination Compoundsasked once
- 1.Elements of Groups 16, 17 and 18asked once
- 2.Solid Stateasked once
- 3.Solutionsasked once
- 4.Aldehydes, Ketones and Carboxylic Acidsasked once
- 5.Chemical Kineticsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Halogen Derivativesasked once
- 3.Alcohols, Phenols and Ethersasked once
- 4.Solid Stateasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Coordination Compoundsasked once
- 3.Solid Stateasked once
- 4.Solutionsasked once
- 5.Transition and Inner Transition Elementsasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Chemical Kineticsasked once
- 3.Chemical Kineticsasked once
- 4.Halogen Derivativesasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Aminesasked once
- 2.Biomoleculesasked once
- 3.Coordination Compoundsasked once
- 4.Green Chemistry and Nanochemistryasked once
- 5.Halogen Derivativesasked once
- 1.Halogen Derivativesasked once
- 2.Solid Stateasked once
- 3.Transition and Inner Transition Elementsasked once
- 4.Alcohols, Phenols and Ethersasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Aminesasked once
- 3.Aminesasked once
- 4.Chemical Thermodynamicsasked once
- 5.Coordination Compoundsasked once
- 1.Chemical Thermodynamicsasked once
- 2.Solutionsasked once
- 3.Solutionsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Electrochemistryasked once
- 2.Solutionsasked once
- 3.Elements of Groups 16, 17 and 18asked once
- 4.Transition and Inner Transition Elementsasked once
- 5.Transition and Inner Transition Elementsasked once
- 1.Alcohols, Phenols and Ethersasked once
- 2.Solutionsasked once
- 3.Transition and Inner Transition Elementsasked once
- 4.Electrochemistryasked once
- 5.Ionic Equilibriaasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Coordination Compoundsasked once
- 4.Coordination Compoundsasked once
- 5.Transition and Inner Transition Elementsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Alcohols, Phenols and Ethersasked once
- 3.Solid Stateasked once
- 4.Coordination Compoundsasked once
- 5.Chemical Thermodynamicsasked once
- 1.Chemical Thermodynamicsasked once
- 2.Halogen Derivativesasked once
- 3.Ionic Equilibriaasked once
- 4.Electrochemistryasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Halogen Derivativesasked once
- 2.Ionic Equilibriaasked once
- 3.Chemical Thermodynamicsasked once
- 4.Elements of Groups 16, 17 and 18asked once
- 5.Halogen Derivativesasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Electrochemistryasked once
- 3.Aminesasked once
- 4.Biomoleculesasked once
- 5.Chemical Kineticsasked once
- 1.Electrochemistryasked once
- 2.Electrochemistryasked once
- 3.Elements of Groups 16, 17 and 18asked once
- 4.Introduction to Polymer Chemistryasked once
- 5.Solutionsasked once
- 1.Alcohols, Phenols and Ethersasked once
- 2.Aldehydes, Ketones and Carboxylic Acidsasked once
- 3.Aminesasked once
- 4.Biomoleculesasked once
- 5.Chemical Kineticsasked once
- 1.Chemical Thermodynamicsasked once
- 2.Coordination Compoundsasked once
- 3.Elements of Groups 16, 17 and 18asked once
- 4.Solid Stateasked once
- 5.Solutionsasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Chemical Kineticsasked once
- 3.Transition and Inner Transition Elementsasked once
- 4.Halogen Derivativesasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Solid Stateasked once
- 2.Aldehydes, Ketones and Carboxylic Acidsasked once
- 3.Green Chemistry and Nanochemistryasked once
- 4.Aminesasked once
- 5.Electrochemistryasked once
- 1.Ionic Equilibriaasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Introduction to Polymer Chemistryasked once
- 4.Coordination Compoundsasked once
- 5.Coordination Compoundsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Transition and Inner Transition Elementsasked once
- 3.Coordination Compoundsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Chemical Thermodynamicsasked once
- 1.Halogen Derivativesasked once
- 2.Ionic Equilibriaasked once
- 3.Electrochemistryasked once
- 4.Elements of Groups 16, 17 and 18asked once
- 5.Halogen Derivativesasked once
- 1.Ionic Equilibriaasked once
- 2.Chemical Thermodynamicsasked once
- 3.Elements of Groups 16, 17 and 18asked once
- 4.Halogen Derivativesasked once
- 5.Introduction to Polymer Chemistryasked once
- 1.Electrochemistryasked once
- 2.Solutionsasked once
- 3.Biomoleculesasked once
- 4.Solid Stateasked once
- 5.Electrochemistryasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Coordination Compoundsasked once
- 4.Coordination Compoundsasked once
- 5.Transition and Inner Transition Elementsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Coordination Compoundsasked once
- 3.Electrochemistryasked once
- 4.Electrochemistryasked once
- 5.Introduction to Polymer Chemistryasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Electrochemistryasked once
- 3.Introduction to Polymer Chemistryasked once
- 4.Introduction to Polymer Chemistryasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Aminesasked once
- 3.Biomoleculesasked once
- 4.Chemical Kineticsasked once
- 5.Chemical Thermodynamicsasked once
- 1.Coordination Compoundsasked once
- 2.Electrochemistryasked once
- 3.Elements of Groups 16, 17 and 18asked once
- 4.Green Chemistry and Nanochemistryasked once
- 5.Halogen Derivativesasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Ionic Equilibriaasked once
- 3.Solid Stateasked once
- 4.Solutionsasked once
- 5.Transition and Inner Transition Elementsasked once
- 1.Alcohols, Phenols and Ethersasked once
- 2.Aldehydes, Ketones and Carboxylic Acidsasked once
- 3.Aminesasked once
- 4.Biomoleculesasked once
- 5.Chemical Kineticsasked once
- 1.Chemical Thermodynamicsasked once
- 2.Coordination Compoundsasked once
- 3.Electrochemistryasked once
- 4.Elements of Groups 16, 17 and 18asked once
- 5.Green Chemistry and Nanochemistryasked once
- 1.Halogen Derivativesasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Ionic Equilibriaasked once
- 4.Solid Stateasked once
- 5.Solutionsasked once
- 1.Transition and Inner Transition Elementsasked once
- 2.Alcohols, Phenols and Ethersasked once
- 3.Aldehydes, Ketones and Carboxylic Acidsasked once
- 4.Aminesasked once
- 5.Biomoleculesasked once
- 1.Chemical Thermodynamicsasked once
- 2.Coordination Compoundsasked once
- 3.Electrochemistryasked once
- 4.Elements of Groups 16, 17 and 18asked once
- 5.Halogen Derivativesasked once
- 1.Introduction to Polymer Chemistryasked once
- 2.Ionic Equilibriaasked once
- 3.Solutionsasked once
- 4.Transition and Inner Transition Elementsasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Aminesasked once
- 3.Biomoleculesasked once
- 4.Chemical Thermodynamicsasked once
- 5.Coordination Compoundsasked once
- 1.Electrochemistryasked once
- 2.Elements of Groups 16, 17 and 18asked once
- 3.Halogen Derivativesasked once
- 4.Introduction to Polymer Chemistryasked once
- 5.Ionic Equilibriaasked once
- 1.Solutionsasked once
- 2.Transition and Inner Transition Elementsasked once
- 3.Alcohols, Phenols and Ethersasked once
- 4.Aldehydes, Ketones and Carboxylic Acidsasked once
- 5.Aminesasked once
- 1.Biomoleculesasked once
- 2.Chemical Thermodynamicsasked once
- 3.Coordination Compoundsasked once
- 4.Electrochemistryasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Halogen Derivativesasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Solutionsasked once
- 4.Transition and Inner Transition Elementsasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Aminesasked once
- 3.Biomoleculesasked once
- 4.Chemical Thermodynamicsasked once
- 5.Coordination Compoundsasked once
- 1.Elements of Groups 16, 17 and 18asked once
- 2.Halogen Derivativesasked once
- 3.Introduction to Polymer Chemistryasked once
- 4.Solutionsasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Biomoleculesasked once
- 3.Chemical Thermodynamicsasked once
- 4.Coordination Compoundsasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Halogen Derivativesasked once
- 2.Introduction to Polymer Chemistryasked once
- 3.Solutionsasked once
- 4.Alcohols, Phenols and Ethersasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Biomoleculesasked once
- 2.Chemical Thermodynamicsasked once
- 3.Coordination Compoundsasked once
- 4.Elements of Groups 16, 17 and 18asked once
- 5.Halogen Derivativesasked once
- 1.Solutionsasked once
- 2.Alcohols, Phenols and Ethersasked once
- 3.Aldehydes, Ketones and Carboxylic Acidsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Elements of Groups 16, 17 and 18asked once
- 1.Solutionsasked once
- 2.Alcohols, Phenols and Ethersasked once
- 3.Aldehydes, Ketones and Carboxylic Acidsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Alcohols, Phenols and Ethersasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Chemical Thermodynamicsasked once
- 3.Alcohols, Phenols and Ethersasked once
- 4.Aldehydes, Ketones and Carboxylic Acidsasked once
- 5.Chemical Thermodynamicsasked once
- 1.Aldehydes, Ketones and Carboxylic Acidsasked once
- 2.Chemical Thermodynamicsasked once
- 3.Aldehydes, Ketones and Carboxylic Acidsasked once
- 4.Chemical Thermodynamicsasked once
- 5.Aldehydes, Ketones and Carboxylic Acidsasked once
- 1.Chemical Thermodynamicsasked once
- 2.Chemical Thermodynamicsasked once