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प्रश्न
With reference to the following metals state their use in daily life metal:
copper
उत्तर
Copper:
- Making calori meters as it is good conductor of heat.
- Making thin wires being conductor of electricity.
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संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
State one use of Gold.
Fill in the following blank with suitable word:
Brass is an alloy of copper and .........
Give reasons
Aluminium is used in making aircrafts.
State two important uses of following metal:
Uses of silver
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 |
With reference to the following metals state their use in daily life metal:
Lead
Name the following:
A metal used in packaging.
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.
Aluminium: _______: gold : : electric insulator
Which of the following property is generally not shown by metals?
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
Why are bells made of metals?
All gases are ______.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
