Magnesium is very reactive metal like (Na, Ca, etc.). When it expose to air it reacts with oxygen to form a layer magnesium oxide (MgO) on its surface. 𝑀𝑔⏟𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚+𝑂₂⏟𝑂𝑥𝑖𝑔𝑒𝑛 → 2𝑀𝑔𝑂⏟ 𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚 𝑂𝑥𝑖𝑑𝑒 This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen.Read more
Magnesium is very reactive metal like (Na, Ca, etc.). When it expose to air it reacts with oxygen to form a layer magnesium oxide (MgO) on its surface.
𝑀𝑔⏟𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚+𝑂₂⏟𝑂𝑥𝑖𝑔𝑒𝑛 → 2𝑀𝑔𝑂⏟ 𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚 𝑂𝑥𝑖𝑑𝑒
This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be used for the reaction.
Exothermic Reaction: Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. For example: Burning of methane in air gives heat and light. CH₄ (g)+O₂ (g) → CO₂ (g)+2H₂O(g)+heat Endothermic Reaction: Reactions that absorb energy or require energy inRead more
Exothermic Reaction: Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions.
For example: Burning of methane in air gives heat and light.
CH₄ (g)+O₂ (g) → CO₂ (g)+2H₂O(g)+heat
Endothermic Reaction: Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. For example: Silver chloride absorb the heat from sunlight and get decomposed into Silver and Chlorine.
2AgCl(s) Sunlight → 2Ag(s)+Cl₂(g)
The government can help in the following ways: • The cultivation can be insured. • Free farming schools • Subsidy of fertilizers and pesticides • Low interest loans For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-6/social-science/
The government can help in the following ways:
• The cultivation can be insured.
• Free farming schools
• Subsidy of fertilizers and pesticides
• Low interest loans
In our country like India our constitution says everybody is having the equality of getting the medical facility, good schools and other resources. The difference between her and Ramalingam is showing the inequality of getting the facilities. It is actually a duty of government to provide the basicRead more
In our country like India our constitution says everybody is having the equality of getting the medical facility, good schools and other resources. The difference between her and Ramalingam is showing the inequality of getting the facilities. It is actually a duty of government to provide the basic facilities to all the people. Loan can be provided.
If I were a member of fishing family I would have taken the loan from the bank for purchasing an engine that can improve my income. I would prefer bank for loan as it is a reliable source for loan and it will charge extra interest for the loan. For more answers visit to website: https://www.tiwariacRead more
If I were a member of fishing family I would have taken the loan from the bank for purchasing an engine that can improve my income. I would prefer bank for loan as it is a reliable source for loan and it will charge extra interest for the loan.
Why Should a magnesium ribbon be cleaned before burning in air?
Magnesium is very reactive metal like (Na, Ca, etc.). When it expose to air it reacts with oxygen to form a layer magnesium oxide (MgO) on its surface. 𝑀𝑔⏟𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚+𝑂₂⏟𝑂𝑥𝑖𝑔𝑒𝑛 → 2𝑀𝑔𝑂⏟ 𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚 𝑂𝑥𝑖𝑑𝑒 This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen.Read more
Magnesium is very reactive metal like (Na, Ca, etc.). When it expose to air it reacts with oxygen to form a layer magnesium oxide (MgO) on its surface.
See less𝑀𝑔⏟𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚+𝑂₂⏟𝑂𝑥𝑖𝑔𝑒𝑛 → 2𝑀𝑔𝑂⏟ 𝑀𝑎𝑔𝑛𝑒𝑠𝑖𝑢𝑚 𝑂𝑥𝑖𝑑𝑒
This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be used for the reaction.
What does one mean by exothermic and endothermic reactions? Give examples.
Exothermic Reaction: Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. For example: Burning of methane in air gives heat and light. CH₄ (g)+O₂ (g) → CO₂ (g)+2H₂O(g)+heat Endothermic Reaction: Reactions that absorb energy or require energy inRead more
Exothermic Reaction: Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions.
For example: Burning of methane in air gives heat and light.
CH₄ (g)+O₂ (g) → CO₂ (g)+2H₂O(g)+heat
Endothermic Reaction: Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. For example: Silver chloride absorb the heat from sunlight and get decomposed into Silver and Chlorine.
2AgCl(s) Sunlight → 2Ag(s)+Cl₂(g)
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-1/
What do you think the government can do to help farmers like Sekar when they get into debt? Discuss.
The government can help in the following ways: • The cultivation can be insured. • Free farming schools • Subsidy of fertilizers and pesticides • Low interest loans For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-6/social-science/
The government can help in the following ways:
• The cultivation can be insured.
• Free farming schools
• Subsidy of fertilizers and pesticides
• Low interest loans
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-6/social-science/
Poor rural labourers like Thulasi often do not have access to good medical facilities, good schools, and other resources. You have read about inequality in the first unit of this text. The difference between her and Ramalingam is one of inequality. Do you think this is a fair situation? What do you think can be done? Discuss in class.
In our country like India our constitution says everybody is having the equality of getting the medical facility, good schools and other resources. The difference between her and Ramalingam is showing the inequality of getting the facilities. It is actually a duty of government to provide the basicRead more
In our country like India our constitution says everybody is having the equality of getting the medical facility, good schools and other resources. The difference between her and Ramalingam is showing the inequality of getting the facilities. It is actually a duty of government to provide the basic facilities to all the people. Loan can be provided.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-6/social-science/
Imagine you are a member of a fishing family and you are discussing whether to take a loan from the bank for an engine. What would you say?
If I were a member of fishing family I would have taken the loan from the bank for purchasing an engine that can improve my income. I would prefer bank for loan as it is a reliable source for loan and it will charge extra interest for the loan. For more answers visit to website: https://www.tiwariacRead more
If I were a member of fishing family I would have taken the loan from the bank for purchasing an engine that can improve my income. I would prefer bank for loan as it is a reliable source for loan and it will charge extra interest for the loan.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-6/social-science/