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प्रश्न
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
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उत्तर
lead nitrate Pb[NO3]2.
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संबंधित प्रश्न
Give a reason for Alkali metals are good reducing agents.
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
State the position of the following in the periodic table:
Alkali metals
Write name.
The oxide that forms salt and water by reacting with both acid and base.
Write scientific reason.
Sodium is always kept in kerosene.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Compare the properties of metals and nonmetals. Give three examples for each.
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
Which of the following metals can displace the other two metals from their salt solutions?
