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प्रश्न
State the information provided by a chemical equation.
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उत्तर
Information provided by a chemical equation:
- It tells us the formulas and symbols of the reactants and products.
- It tells us the ratio in which substances react or are produced. If limitations are covered.
- It tells the physical state of substances i.e. solid, liquid, gas.
- Whether the reaction is endothermic or exothermic.
- Conditions for starting the reaction i.e. if the catalyst is needed or not.
- If reaction is reversible or not.
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संबंधित प्रश्न
Write a balanced molecular equation for the following word equation:
\[\ce{Copper hydroxide + nitric acid->Copper nitrate + water}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{PbO2 + 4HCl->PbCl2 + H2O + Cl2}\]
Balance the following important equation:
NaAlO2 + H2O → NaOH + Al(OH)3
Balance the following important equation:
Na2CO3 + HCl → NaCl + H2O + CO2
Balance the following important equation:
NH3 + O2 → N2 + H2O (burning of NH3)
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?
- Displacement reaction
- Precipitation reaction
- Combination reaction
- Double displacement reaction
Which among the following change is exothermic or endothermic in nature?
Dilution of sulphuric acid
A magnesium ribbon is burnt in oxygen to give a white compound ‘X’ accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound ‘Y’.
- Write the chemical formulae of X and Y.
- Write a balanced chemical equations when X and Y are dissolved in water.
What happens when a piece of
- zinc metal is added to copper sulphate solution?
- aluminium metal is added to dilute hydrochloric acid?
- silver metal is added to copper sulphate solution?
Also write the balanced chemical equation if the reaction occurs.
Complete and balance the following equation:
\[\ce{C2H5COONa + NaOH ->[\Delta][CaO]}\]
