Advertisements
Advertisements
Question
Name a metal which is best conductor of electricity :
Solution
Silver
APPEARS IN
RELATED QUESTIONS
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
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 two important uses of following metal
Uses of copper
State two important uses of following metal
Uses of tin
State the position of the following in the periodic table:
Alkali metals
Give a reason why a green deposit is seen on the surface of an article of copper
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.
The minerals from which the metal can be separated economically are called _______.
Match the columns.
Group A | Group B |
1) Copper and Zinc | a) Brass |
2) Copper and Tin | b) Bronze |
c) Stainless steel |
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
Complete the following flow chart.
Which one of the following is an example for a metal?
Why are bells made of metals?
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Which of the following is not a metal?
Which of the following metals can displace the other two metals from their salt solutions?
Zinc | iron | copper |
Metals have high melting points.
Which metals are not solid at room temperature?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.