Question

1. Write a word equation for the formation of magnesium oxide.
2. Define reactants. Show the reactants in a chemical equation with an example.
3. What will be the product of the given reaction?
 CO(g)+2H2(g)⎯⎯→Product
4. What are exothermic reactions?
5. Give an example of decomposition reaction carried out with the help of electricity.
6. Explain the given process in terms of electron transfer:
(A) Oxidation (B) Reduction
7. What is a redox reaction? Explain with example.
8. Identify the substance oxidised and the substance reduced in the following reactions:
(A)2PbO + C ⎯⎯→ Pb + CO2
(B) MnO2+ 4HCl ⎯⎯→ MnCl2 + 2H2O + Cl2
9. Why do potato chips manufacturers fill the packet of chips with nitrogen gas?
Short Answer Type Questions:
1. What will be the products formed when ferrous sulphate is heated. Give balanced chemical equation also.
2. Using a suitable chemical equation, justify that some chemical reactions are determined by
(A) Change in colour (B) Change in temperature
3. What is a combination reaction? Explain with an example.
4. How does the colour of copper sulphate solution change when an iron nail is dipped in it?
5. Differentiate between displacement and double displacement reactions. Give examples also.
6. Define decomposition reaction. What is thermal decomposition reaction? Explain.
7. MgSO4 + Cu ⎯⎯→ ?
Is the above given reaction possible? If not possible, than explain why?
8. Give two difference between oxidizing and reducing agent.
9. Identify the type of reaction from the following equations:

Answer 1

Answer:

1.Mg+O = MgO(magnesium oxide)

2.reactant are the substance that undergoes change during a reaction

ex. Mg+O =MgO

so here,Mg and O are reactant

3.