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Chemical Substances Nature And Behaviour

Class 10 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceWhy is burning of magnesium both a combination reaction and an oxidation reaction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Medium ScienceWhat will be the ratio of magnesium atoms to oxygen atoms in four formula units of magnesium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceIf iron atoms are equal but oxygen atoms are not equal in an equation, what is the equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Medium ScienceWhat is the deepest reason for keeping atoms of all elements equal on both sides of a balanced chemical equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Hard ScienceAfter a reaction in an open container, the measured mass appears lower because a gas produced has escaped. What is the correct scientific explanation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 4Hard ScienceWhich chemical process do antioxidants slow down in food?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceWhy does an oiled iron object rust less?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceIn the thermite reaction Fe₂O₃ + 2Al → Al₂O₃ + 2Fe, which statement correctly identifies oxidation and reduction?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Hard ScienceWhy is a precipitate shown by a downward arrow in an equation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhy can burning of magnesium be considered both combination and oxidation?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceWhat will be the ratio of magnesium atoms to oxygen atoms in three units of magnesium oxide?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhat is the total number of atoms in two water molecules?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Easy ScienceWhy is measuring less mass after gas escapes from an open container not against conservation of mass?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceIn a closed container a metal reacts with acid and gas forms but does not escape. What is the most suitable conclusion about total mass?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 3Medium ScienceWhat is the correct respective meaning of upward arrow and downward arrow?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy ScienceWhich problem do antioxidants and airtight packing both reduce?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy ScienceWhich main chemical reaction causes the change in taste and smell during rancidity of oils and fats?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Medium ScienceWhich condition will be most helpful for rusting of iron?Class 10Chemical Substances – Nature and BehaviourLevel 2Easy ScienceRemoval of hydrogen and addition of hydrogen are associated with which processes, respectively?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy ScienceIn the same reaction, one substance loses oxygen and another gains oxygen. What is it called?Class 10Chemical Substances – Nature and BehaviourChemical Reactions and EquationsLevel 2Easy