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प्रश्न
Find the odd man out:
Turmeric, Methyl Orange, Rose petals, Beetroot.
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उत्तर
Methyl orange
Turmeric, rose petals and beetroot are natural indicators, while methyl orange is a synthetic indicator.
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संबंधित प्रश्न
Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:
| Indicator | Colour change | Inference |
| Methyl Orange | No change | ...................... |
| .................... | Acid | |
| Yellow | ....................... |
Balance the following chemical equation.
\[\ce{BaCl2 + H2SO4 -> BaSO4 + HCl}\]
Write the balanced chemical equation for the following reaction.
\[\ce{Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water}\]
On what basis is a chemical equation balanced?
Balance the following equation:
\[\ce{Fe + O2 -> Fe2O3}\]
What is a chemical equation? Explain with the help of an example.
Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.
Write a balanced chemical equation for the process of photosynthesis giving the physical states of all the substances involved and the conditions of the reaction.
What is meant by a chemical reaction? Explain with the help of an example.
Give one example of a chemical reaction characterised by the formation of a precipitate.
State the various characteristics of chemical reactions.
The chemical reaction between two substances is characterised by a change in colour from orange to green. These two substances are most likely to be ______.
Balance the following chemical equation :
H2 + O2 → H2O
Write your observation for the following chemical reaction and name the product formed :
When manganese dioxide is added to potassium chlorate and heated.
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.
`"H"_2 +"CI"_2 → "HCI"`
Balance the equation stepwise.
Ag(s) + HCl(aq) → AgCl ↓+ H2 ↑
Write the chemical equation for the following word equation and balance them.
Calcium oxide + Carbon dioxide → Calcium carbonate
Balance the following equation:
HNO3 + H2S → NO2 + H2O + S
What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2
Write the balanced chemical equation of the following reaction.
copper + nitric acid → copper nitrate + nitric oxide + water
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
What is thermit process?
Name the substance that is getting oxidised in the thermit process.
Write word equation for the following molecular equation:
\[\ce{CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2↓}\]
Word equation:
State the colour of the products.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Dilute hydrochloric acid to silver nitrate.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Is the equation given above a balanced equation. Give reasons.
What is meant by ‘reactants’ and ‘products’ in a chemical equation?
Balance the following simple equation:
C + O2 → CO
Balance the following simple equation:
H2S + Cl2 → S + HCl
Balance the following simple equation:
Mg + CO2 → MgO + C
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
Write a balanced equation for the following word equation:
Nitrogen dioxide + Water + Oxygen → Nitric acid
Write a balanced equation for the following word equation:
Aluminium + Oxygen → Aluminium oxide
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Cl2 + 2H2O + SO2 → 4HCl + H2SO4
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
2H2O + 2Cl2 → 2HCl + O2
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
