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प्रश्न
Tick (√) the most appropriate answer.
Graphite is used :
पर्याय
for sterilisation of water
for making stainless steel
as dry lubricant
in making electric bulbs
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उत्तर
as dry lubricant
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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. ( )
Give a reason for Alkali metals are good reducing agents.
The atomic number of an element Y is 16.
(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?
(b) Which inert gas is nearest to Y?
What is an amalgam?
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.
How are the properties of an alloy different from those of the constitutent elements?
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
State two important uses of following metal:
Uses of silver
Write name.
The nonmetal having electrical conductivity.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
With reference to the following metals state their use in daily life metal:
Silver
Which one of the following is an example for a metal?
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
What is ductility?
The most abundant metal in the earth’s crust is ____________.
Metals are usually solids or gases at room temperature.
Which of the following metals can displace the other two metals from their salt solutions?
Sodium is a hard metal.
