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प्रश्न
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Make a list of the elements in the chemical equation.
उत्तर
Elements in the chemical reaction are: Na, O, H and S.
APPEARS IN
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 | ....................... |
Write the balanced chemical equation for the following reaction.
\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]
On what basis is a chemical equation balanced?
What is wrong with the following chemical equation?
Mg + O → MgO
Correct and balance it.
How will you indicate Exothermic reaction in a chemical equation?
Correct and balance the following equation:
Ca + H2O 
CaOH + H
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are reactants.
Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.
State the various characteristics of chemical reactions.
What do you understand by exothermic reactions?
Is Electrolysis of water an endothermic reaction or an exothermic reaction?
Which of the following is not an endothermic reaction?
(a) CaCO3 → CaO + CO2
(b) 2H2O →2H2 + O2
(c) 6CO2 + 6H2O → C6H12O6 + 6O2
(d) C6H12O6 + 6O2 → 6CO2 + 6H2O
Balance the following chemical equation:
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".
Why do we need to balance chemical equations?
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 :
Fe + O2 → Fe3 O4
Balance the following equation:
Fe2O3 + CO → Fe + CO2
Balance the following equation:
S + H2SO4 → SO2 + H2O
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Balance the following equation:
Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2
What is the valency of :
carbon in CH4
Write the balanced chemical equations of the following reactions.
chlorine + sulphur dioxide + water → sulphuric acid + hydrogen chloride
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 sulphate + sodium hydroxide → sodium sulphate + sodium meta aluminate + water.
Write the balanced chemical equation of the following reaction.
potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the volume of chlorine gas formed at S.T.P.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of acid required.
Write word equation for the following molecular equation:
Na2SO3 + 2HCl [dil.] → 2NaCl + H2O + SO2 [g]
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
Give reason for the following:
Silver salts are kept in dark coloured bottles.
Give an example of a chemical equation in which two reactants form:
three product
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State what is a ‘balanced equation’.
Balance the following simple equation:
Al + O2 → Al2O3
Balance the following simple equation:
Al + N2 → AlN
Balance the following simple equation:
Fe + Cl2 → FeCl3
Write a balanced equation for the following word equation:
Potassium bromide + Chlorine → Potassium chloride + Bromine
Which of the following statements about the given reaction are correct?
`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`
- Iron metal is getting oxidised
- Water is getting reduced
- Water is acting as reducing agent
- Water is acting as oxidising agent
