Advertisements
Advertisements
प्रश्न
Which property of 'solder' alloy makes it suitable for welding electrical wires?
उत्तर
Solder is an alloy of lead and tin. Its composition is 50 percent lead (Pb) and 50 percent tin (Sn). The melting point of solder is very low and is even lower than its constituting metals (Pb and Sn). Thus, the low melting point of solder makes it suitable for welding electrical wires.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
Write the name and formulae of a metal hydride.
Fill in the following blank with suitable word:
The alloy in which one of the metals is mercury is called an ...............
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Give reasons
Aluminium is used in making aircrafts.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
State two important uses of following metal
Uses of zinc
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
______ is the first scientist who used the term element.
