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प्रश्न
Name the following:
A metal used in flexible pipes.
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उत्तर
Lead
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
State one use of Aluminium.
What is an amalgam?
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.
Give reasons
Magnesium is used in fire works.
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
State two important uses of following metal:
Uses of gold
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write name.
Molecular formula of the common ore of aluminium.
Write scientific reason.
Sodium is always kept in kerosene.
Give reasons for the following:
Most metals conduct electricity well.
Soft metal : Na : : hard metal : _______
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
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?
______ is the first scientist who used the term element.
Metals are ______ conductors of heat and electricity.
