Question

1. How does sodium react with water?
2. Why are aluminium and copper used for making
electric wires?
3. Why non-metals are stored in water?
4. What is the difference in the reaction of O, with
metals and non-metals?
5. Why it is not advisable to keep food in copper
vessels?
6. Why the non-metals do not show displacement
reaction?
7. Discuss the reasons for the difference in the
melting and boiling points of metals and
non-metals?
8. What do you mean by amalgam?
VIII. Answer the following questions in detail:
1. In which reaction is hydrogen gas liberated?
Describe with the help of an activity.
2. How can you prove that air and water are necessary
in corrosion?
3. Discuss the reaction of carbon with o, when the
supply of O, is (a) sufficient and (b) insufficient.
What is the final product in each case? Give
chemical reactions.
4. Describe some methods of preventing rusting of
iron.
5. Distinguish between the properties of metals and
non-metals.
6. What is a chemical reaction? What information
do you get from this, and how are reactions
expressed?​

Answer 1

Answer:

सोडियम पानी के साथ क्रिया करके sodiumhidroxide व hidrogen गैस देता है।

Explanation:

सोडियम एक अतिक्रियाशील तत्व है। यह वायु और जल से बहुत जल्दी रिएक्शन कर लेता है। इसी कारण इसे केरोसिन में डुबोकर भी रखा जाता है।