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प्रश्न
Name the various types of chemical reactions.
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उत्तर
The various types of chemical reactions are as follows:
- Combination reaction
- Decomposition reaction
- Displacement reaction
- Double displacement reaction
- Oxidation and reduction reaction
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संबंधित प्रश्न
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
How will you indicate a solution made in water in a chemical equation?
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:
MnO2 + HCI → MnCI2 + CI2 + H2O
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
Write word equation for the following skeletal equation:
\[\ce{CO + O2 -> CO2}\]
Write word equation for the following skeletal equation:
\[\ce{AgBr -> Ag + Br2}\]
Write word equation for the following skeletal equation:
\[\ce{KNO3 -> KNO2 + O2}\]
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Balance the following equation :
Pb3O4 → PbO + O2
Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.
Balance the equation stepwise.
Ag(s) + HCl(aq) → AgCl ↓+ H2 ↑
State the information conveyed by the following equation:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2 ↑
Balance the following equation:
KOH + Cl2 → KCl + KClO + H2O
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
Why should an equation be balanced? Explain with the help of a simple equation.
Match column A with column B.
| Column A | Column B |
| (a) Blue salt changes to white and then black | (i) Ammonium dichromate |
| (b) Orange coloured compound changes to green. | (ii) Iodine |
| (c) Red compound changes to brown and then yellow. | (iii) Zinc Nitrate |
| (d) White to yellow when hot and white when cold. | (iv) Copper sulphate |
| (e) Violet solid changes to violet vapours. | (v) Red Lead |
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Electrical energy
Balance the following simple equation:
Fe2O3 + CO → Fe + CO2
Give a balanced equation by the partial equation method, [steps are given below].
Oxidation of Lead [II] Sulphide by Ozone
- Ozone first decomposes to give molecular oxygen & nascent oxygen.
- Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate.
