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प्रश्न
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
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उत्तर
Silver is best conductor of electricity.
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संबंधित प्रश्न
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
State one use of Iron.
Name two alloys of iron. What elements are present in these alloys?
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?
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
Mention two uses of the following metals and non-metals
Oxygen
Give two uses of Germanium
State two important uses of following metal
Uses of lead
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Water.
Write name.
The nonmetal having electrical conductivity.
Write scientific reason.
Sodium is always kept in kerosene.
With reference to the following metals state their use in daily life metal:
copper
Aluminium: _______: gold : : electric insulator
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Metals are usually solids or gases at room temperature.
Which metals are liquid at room temperature?
