Question

Question 1. Write a chemical equation when magnesium metal reacts with aqueous
hydrochloric acid to produce a solution of magnesium chloride and hydrogen gas.
Question 2. Can a combination reaction be redox reaction.
Question 3. Why do we apply palnt on Iron articles?
Question 4. What are the different types of reactions?
Question 5. What is a decomposition rection ? Give example.
Questlon 6. Define displacement reaction.
Question 7. What happens when sodium reacts with water?
Question 8. Write the chemical equation and name the reaction when a solution of sodium chloride
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is mixed with a solution of silver nitrate and a white precipitate of silver chloride is formed.
Question 9. Why does the color of copper sulphate solution change, when an iron nail is dipped in it?
Question 10. Why is photosynthesis considered as an endothermic reaction?
Question 11. Potassium chlorate (KCIO3) on heating forms potassium chloride and oxygen. Write a
balanced equation for this reaction.
Question 12. Give an example of a chemical reaction characterized the change in temperature,
Question 13. What type of chemical reactions take place when:
a) Limestone isheating?
b)A magnéslum wirehpurnt in air?
c) Electricity is passed through water?
d) Ammonia and hydrogen chloride aremixed?
e)Silver bromide is exposed to sunlight?
Question 14. To balance a chemical equation, can we change the formula of elther reactants or
products?
Question 15. Why should a magnesium ribbon be cleaned before burning in air?
Question 16. If an of the following reactions occurs spontaneously, write the balanced net
Ionic equation. If not, write no reaction&
a)Pb+Zn2+ Pb2+ +Zn
b)Fe+H+ Fe2+ +H2
c)Cu +Ag+ Cu2+ +Ag
d) Cr+Zn2+ Cr3+ +Zn
Question 17. Nickel (II) nitrate is prepared by heating nickel metal with liquid dinitrogen tetroxide. In
addition to the nitrate, gaseous nitrogen monoxide is formed. Write the balanced equation.
Question 18. Why is the amount of gas collected in one of the test tubes in electrolysis of
water double of the amount collected in the other? Name this gas.
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Answer 1

Answer:

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Answer 2

THESE MANY QUESTIONS FOR ONLY 5 POINTS