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प्रश्न
What is a chemical equation?
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उत्तर
A chemical equation is a short hand representation of a chemical reaction with the help of chemical symbols and formulas.
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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.
Balance the given equation:
AI2(SO4)3 +NaOH 
AI(OH)3 + Na2SO4
Balance the given equation:
BaCI2 + H2SO4 
BaSO4 + HCI
Is Respiration an endothermic reaction or an exothermic reaction?
The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity
A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.
Balance the following equation:
Fe + H2O → Fe3O4 + H2
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate mass of MnO2 used.
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 – lead [IV] oxide.
Balance the following simple equation:
KHCO3 → K2CO3 + H2O + CO2
