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प्रश्न
Define: Endothermic reaction
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उत्तर
The reactions in which heat is absorbed are called endothermic reactions. The reactants absorb heat for form products.
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संबंधित प्रश्न
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
Write the balanced chemical equation for the following reaction.
\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]
Write the balanced chemical equation for the following reaction.
\[\ce{Zinc + Silver nitrate -> Zinc nitrate + Silver}\]
2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.
Translate the following statement into chemical equation and then balance the equation:
Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.
Complete and balance the following equation:
NaOH + ............ 
Na2 SO4 + H2O
Balance the given equation:
H2O2 
H2O + O2
Balance the given equation:
Fe + O2 
Fe2O3
Balance the given equation:
AI(OH)3 
AI2O3 +H2O
Balance the given equation:
NH3 + CuO 
Cu +N2 +H2O
Balance the gievn equation:
NaOH + H2SO4 
Na2SO4 + H2O
Balance the given chemical equation:
C + CO2 → CO
Balance the following equation and add state symbols:
Zn + HCI → ZnCI2 + H2
Write the balanced equation for the following reaction, and add the state symbols:
Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.
Give one example of a chemical reaction characterised by formation of a precipitate.
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle?
Is Photosynthesis an endothermic reaction or an exothermic reaction?
Express the following facts in the form of a balanced chemical equation:
"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed".
Balance the following chemical equation :
Na2CO3 + HCl → NaCI + H2O + CO2
Balance the following equation. Also name the product formed.
`"H"_2 +"CI"_2 → "HCI"`
Balance the equation stepwise.
Ag(s) + HCl(aq) → AgCl ↓+ H2 ↑
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
What is a chemical equation? Why it is necessary to balance it?
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NO2 +H2O → HNO2 + HNO3
Balance the following equation:
H2O + Cl2 → HCl + O2
Write the balanced chemical equation of the following reaction. sodium hydroxide + sulphuric acid → sodium sulphate + water
Write the balanced chemical equation of the following reaction.
copper + nitric acid → copper nitrate + nitric oxide + water
Write the balanced chemical equation of the following reaction.
aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate mass of MnO2 used.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of salt formed.
Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________
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\[\ce{CuO + H2SO4 -> CuSO4 + H2O}\]
Name the following:
Two non-metal which react explosively when brought in close contact.
Give an example of a chemical equation in which two reactants form:
four product
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\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]
Write a balanced equation for the following word equation:
Potassium bromide + Chlorine → Potassium chloride + Bromine
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
C2H5OH + 3O2 → 2CO2 + 2H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
NaOH + CO2 → Na2CO3 + H2O
Which of the following is the correct observation of the reaction shown in the above set up?
