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प्रश्न
What are reactants? Explain with the help of example.
उत्तर
- The substances taking part in chemical reaction are called reactants.
- E.g. Formation of carbon dioxide gas by combustion of coal in air is a chemical reaction. In this reaction, coal (carbon) and oxygen (from air) are the reactants while carbon dioxide is the product.
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संबंधित प्रश्न
How will you indicate Endothermic reaction in a chemical equation?
What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.
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State one characteristic of the chemical reaction which takes place when dilute sulphuric acid is added to barium chloride solution.
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(a) CaCO3 → CaO + CO2
(b) 2H2O →2H2 + O2
(c) 6CO2 + 6H2O → C6H12O6 + 6O2
(d) C6H12O6 + 6O2 → 6CO2 + 6H2O
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(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?
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(a) oxidation
(b) corrosion
(c) reduction
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2H2
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H2O + Cl2 → HCl + O2
Balance the following equation:
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potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
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\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
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- Ammonia
- Sulphur dioxide
- Hydrogen Chloride
- Chlorine
- Carbon Dioxide
- Oxygen
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(b) Select a basic gas mentioned in Q.1 (a). How is the basic nature suspected?
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Answer the following question.
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Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
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Answer the following:
Name the reactants and the products in the above equation.
Give reason for the following:
Silver salts are kept in dark coloured bottles.
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three product
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H2S + Cl2 → S + HCl
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A chemical equation is a shorthand form for a _______ change.
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2H2O + 2Cl2 → 2HCl + O2
Give the characteristic tests for the following gases :
- CO2
- SO2
- O2
- H2
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\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Grams: 42 g + ______ `→` ______ + ______
