Advertisements
Advertisements
प्रश्न
Balance the following equation:
Pb3O4 → PbO + O2
उत्तर
2Pb3O4 → 6PbO + O2
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
Substitute formulae for names and balance the following equation:
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.
Give one example of an endothermic reaction.
Is Decomposition of calcium carbonate an endothermic reaction or an exothermic reaction?
Write word equation for the following skeletal equation:
\[\ce{KNO3 -> KNO2 + O2}\]
Write your observation for the following chemical reaction and name the product formed:
When sugar is heated.
Balance the following equation:
Ca + N2 → Ca3N2
Write the balanced chemical equation of the following reaction.
aluminium carbide + water → aluminium hydroxide + methane
Answer the following question.
What is observed when 2 mL of dilute hydrochloric acid is added to 1 g of sodium carbonate taken in a clean and dry test tube? Write a chemical equation for the reaction involved.
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – mercury [II] oxide.