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Class 10 · Science · Easy
→What must be written for the reactants and products to convert a word equation into a chemical equation?
Class 10 · Science · Easy
→What does the law of conservation of mass state?
Class 10 · Science · Easy
→What is equal on both sides of a balanced chemical equation?
Class 10 · Science · Easy
→Why is it wrong to change chemical formulae while balancing a chemical equation?
Class 10 · Science · Easy
→Which symbol denotes the state of a substance dissolved in water in a chemical equation?
Class 10 · Science · Easy
→Which symbol represents the gaseous state in a chemical equation?
Class 10 · Science · Easy
→Which is the symbol for liquid state in a chemical equation?
Class 10 · Science · Easy
→Which state symbol represents a substance in the solid state in a chemical equation?
Class 10 · Science · Easy
→What does an upward arrow ( \uparrow ) after a product in a chemical equation indicate?
Class 10 · Science · Easy
→What does a downward arrow in a chemical equation indicate?
Class 10 · Science · Easy
→Which process do antioxidants slow down?
Class 10 · Science · Easy
→What is the main reason for filling potato-chip packets with nitrogen gas?
Class 10 · Science · Easy
→What is reduced when food is kept in a cool place to prevent rancidity?
Class 10 · Science · Easy
→What is the development of an unpleasant smell and taste in oils and fats due to oxidation called?
Class 10 · Science · Easy
→In galvanisation, iron is coated with a layer of which metal?
Class 10 · Science · Easy
→What is the main purpose of painting iron to prevent rusting?
Class 10 · Science · Easy
→Rusting of iron is related to which process?
Class 10 · Science · Medium
→A student says that magnesium is not oxidised in the reaction 2Mg + O₂ → 2MgO because it merely combines with oxygen to form a compound. What is the error in this statement?
Class 10 · Science · Easy
→A substance from which oxygen is removed undergoes which process?
Class 10 · Science · Easy
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