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प्रश्न
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
पर्याय
True
False
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उत्तर
False
APPEARS IN
संबंधित प्रश्न
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.
State one use of Iron.
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
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.
What is an alloy? Give two examples of alloys.
Aluminium is not used to make :
State two important uses of following metal
Uses of magnesium
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
Write scientific reason.
Sodium is always kept in kerosene.
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
Give reasons for the following:
Most metals conduct electricity well.
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
Why are bells made of metals?
The most abundant metal in the earth’s crust is ____________.
Metals are ______ conductors of heat and electricity.
All gases are ______.
Which metals are liquid at room temperature?
