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प्रश्न
Writing a chemical reaction in brief by using chemical formulae is called as _______.
पर्याय
chemical change
chemical symbol
chemical equation
chemical reaction
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उत्तर
Writing a chemical reaction in brief by using chemical formulae is called as chemical equation.
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संबंधित प्रश्न
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
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.
How will you indicate the following effect in a chemical equation?
Exothermic reaction
Balance the following equation:
\[\ce{NH3 + CuO -> Cu + N2 + H2O}\]
Balance the following chemical equation:
\[\ce{C + CO2 -> CO}\]
Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.
Balance the following chemical equation:
\[\ce{MnO2 + HCl -> MnCl2 + Cl2 + H2O}\]
Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in colour.
Give a chemical equation for the reaction involved in the above case.
State one characteristic of the chemical reaction which takes place when lemon juice is added gradually to the potassium permanganate solution.
One of the following is an exothermic reaction. This is:
Balance the following chemical equation:
\[\ce{Pb(NO3)2_{(s)} ->[Heat] PbO_{(s)} + NO2_{(g)} + O2_{(g)}}\]
Write word equation for the following skeletal equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write symbolic representation for the following word equation and balance them :
Aluminium + Chlorine → Aluminium chloride.
Write your observation and name the product when zinc reacts with dilute hydrochloric acid.
Raisins are wiped off gently before final weighing with the help of
Write the chemical equation for the following word equation and balance them.
Magnesium + Sulphuric acid → Magnesium sulphate + Hydrogen
Balance the following equation:
KOH + Cl2 → KCl + KClO + H2O
Why should an equation be balanced? Explain with the help of a simple equation.
Write the balanced chemical equation of the following reaction.
potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
Write the balanced chemical equation of the following reaction.
ammonia + oxygen → nitric oxide + water
Write word equation for the following molecular equation:
AgN03 + HCI → HNO3 + AgCl ↓
Word equation:
State whether AgCl is soluble or insoluble in HN03.
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 – copper carbonate.
Give reason for the following:
Silver salts are kept in dark coloured bottles.
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State what is a ‘balanced equation’.
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
Give a reason why the above equation is balanced.
Balance the following simple equation:
K + CO2 → K2O + C
Balance the following simple equation:
Al + H2O → Al2O3 + H2
Balance the following simple equation:
Al + H2SO4 → Al2(SO4)3 + H2
Balance the following simple equation:
NaOH + Cl2 → NaCl + NaClO + H2O
With reference to a chemical equation state which of the statements 1 to 5 pertain to A or B.
A: Information provided by a chemical equation.
B: Limitations of a chemical equation.
- The nature of the individual elements.
- The speed of the reaction.
- The state of matter in which the substance is present.
- The completion of the reaction.
- The direction of the reaction.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
NaOH + CO2 → Na2CO3 + H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
3CuO + NH3 → 3Cu + 3H2O + N2
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
PbO2 +4HCl → PbCl2 + H2O + Cl2
What are products? Explain with the help of example.
The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?
