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प्रश्न
Substitute formulae for names and balance the following equation:
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.
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उत्तर
Ca(CO3) (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
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संबंधित प्रश्न
How will you indicate Exothermic reaction in a chemical equation?
Complete and balance the following equation:
NaOH + ............ 
Na2 SO4 + H2O
Correct and balance the following equation:
Ca + H2O 
CaOH + H
What do you understand by exothermic reactions?
Is Respiration an endothermic reaction or an exothermic reaction?
Explain the following reaction with one suitable example .
Decomposition reaction
Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.
Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.
What do the following symbol stand for?
2H2
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Write the balanced chemical equation of the following reaction.
aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen
Write word equation for the following molecular equation:
Na2SO3 + 2HCl [dil.] → 2NaCl + H2O + SO2 [g]
Give word equation for the following chemical reaction and give the names of the product formed.
Zn + S → ZnS
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
\[\ce{Na2SO3 + 2HCl ->[\triangle] 2NaCl + H2O + SO2}\]
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2SO3}\]
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
Write a balanced equation for the following word equation:
Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide
Give a balanced equation by partial equation method, [steps are given below].
The reaction of excess ammonia with chlorine – Ammonia as a reducing agent
- Ammonia first reacts with chlorine to give hydrogen chloride and nitrogen.
- Hydrogen chloride then further reacts with excess ammonia to give ammonium chloride.
What is a chemical equation?
Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?
- In beakers A and B, exothermic process has occurred.
- In beakers A and B, endothermic process has occurred.
- In beaker C exothermic process has occurred.
- In beaker C endothermic process has occurred.
