START QUIZ #1. When iron rusts, its weight Remains same Remains same Decreases Decreases Remains same Remains same Increases Increases #2. Sodium bicarbonate is useful as a fire extinguisher because it has It releases water which extiguishes fire It releases water which extiguishes fire It decomposes on heating to give carbon dioxide It decomposes on heating to give carbon dioxide It serves as a blanket for fire It serves as a blanket for fire It emits a foam which extiguishes fire It emits a foam which extiguishes fire #3. Dry ice at room temperature gives Salty water Salty water Carbon dioxide Carbon dioxide Water Water Liquid Carbon dioxide Liquid Carbon dioxide #4. Entropy change of a system depends on Temperature Temperature Volume Volume None of the above None of the above Pressure Pressure #5. The total entropy change for a reversible isothermal cycle is Positive Positive Variable Variable Zero Zero Negative Negative Next Page >> < Results > - Congratulations. You passed the exam. Sorry You failed this exam. write the exam again.