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प्रश्न
Choose the correct answer from the options given below.
The formula of sodium carbonate is Na2CO3 and that of calcium hydrogen carbonate is
विकल्प
CaHCO3
Ca(HCO3)2
Ca2HCO3
Ca(HCO3)3
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उत्तर
Ca(HCO3)2
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संबंधित प्रश्न
Balance the given equation:
H2O2 
H2O + O2
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
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(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.
What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2
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potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.
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 |
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.
NH3 + HCl ⇌ NH4Cl
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
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Which of the following is not a physical change?
