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प्रश्न
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
पर्याय
pH paper
Litmus paper
Standard pH value chart
- Universal indicator
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उत्तर
Litmus paper
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संबंधित प्रश्न
Write the balanced chemical equation for the following reaction.
\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]
What does the symbol (aq) represent in a chemical equation?
A solution made in water is known as an ______ solution and indicated by the symbol ______.
Giving examples, state the difference between balanced and unbalanced chemical equations.
Convey the following information in the form of a balanced chemical equation:
“An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution.”
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.
Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.
The chemical reaction between quicklime and water is characterised by ______.
Balance the following chemical equation:
\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]
A colourless lead salt, when heated, produces a yellow residue and brown fumes.
- Name the lead salt.
- Name the brown fumes.
- Write a chemical equation of the reaction involved.
Write your observations and name the product when
Iron nails are added to an aqueous solution of copper sulphate.
Write word equation for the following skeletal equation:
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Write your observation for the following chemical reaction and name the product formed :
When water is added to quick lime?
Balance the following equation. Also name the product formed.
` "H"_2"O"_2 → "H" _2 "O" + "O"_2`
Balance the following equation. Also name the product formed.
`"Na"+ "H"_2 "O" → "NaOH"+ "H"_2`
Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.
Explain the terms with examples.
Balanced equation
Balance the following equation:
NaHCO3 → Na2CO3 + H2O + CO2
Balance the following equation:
Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2
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Write the balanced chemical equation of the following reaction.
silver nitrate → silver + nitrogen dioxide + oxygen
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
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Name the substance that is getting oxidised in the thermit process.
Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Explain the term ‘chemical equation’.
Balance the following simple equation:
Al + N2 → AlN
Balance the following simple equation:
NO + O2 → NO2
Balance the following simple equation:
KHCO3 → K2CO3 + H2O + CO2
CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]
State the information not conveyed by the above chemical equation.
Write a balanced equation for the following word equation:
Calcium hydroxide + Ammonium chloride → Calcium chloride + Water + Ammonia
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
CaC2 + N2 → 2CaCN2 + C
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
6NaOH + 3Cl2 → 6NaCl + NaClO3 + 3H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
2H2O + 2Cl2 → 2HCl + O2
Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would she observe?
Which of the following is the correct observation of the reaction shown in the above set up?
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Grams: 42 g + ______ `→` ______ + ______
