Advertisements
Advertisements
प्रश्न
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
Advertisements
उत्तर
Silver is best conductor of electricity.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
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.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
What is an alloy? How is an alloy made?
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
A metal which is neither ductile nor malleable is
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
Name a metal which is best conductor of electricity :
State two important uses of following metal:
Uses of zinc
Write name.
The reagent that dissolves noble metals.
Write scientific reason.
Generally the ionic compounds have high melting points.
What is it made from? Why?
Electric cables
Give a reason why a green deposit is seen on the surface of an article of copper
Name the following:
The most reactive halogen.
Aluminium: _______: gold : : electric insulator
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
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?
The metal can be cut with a knife ______.
All gases are ______.
Silver and copper are very good conductors of electricity.
