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प्रश्न
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
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उत्तर
Copper is used for making power transmission wires.
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
Give reasons for the following.
Sodium and potassium are stored in kerosene.
Give a reason for Alkali metals are good reducing agents.
Write the name and formula of a metal hydride.
State one use of the following metal:
Iron
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
For the reduction of a metal oxide, suggest a reducing agent other than carbon.
Which of the following alloys contains mercury as one of the constituents?
State two important uses of following metal:
Uses of silver
State the position of the following in the periodic table:
Alkaline earth metals
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
Write name.
The reagent that dissolves noble metals.
Name the following:
A halogen which is a solid at room temperature.
Aluminium: _______: gold : : electric insulator
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
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?
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
