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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
Name two alloys of iron. What elements are present in these alloys?
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal
Uses of tin
State two important uses of following metal
Uses of magnesium
Why is hydrogen placed with alkali metals?
Write name.
The nonmetal having electrical conductivity.
Write scientific reason.
Generally the ionic compounds have high melting points.
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
What is it made from? Why?
Ornaments
With reference to the following metals state their use in daily life metal:
copper
With reference to the following metals state their use in daily life metal:
Lead
Complete the following flow chart.
Compare the properties of metals and nonmetals. Give three examples for each.
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
The typical shine of metals is called ______.
Which metals are liquid at room temperature?
