Advertisements
Advertisements
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
Advertisements
उत्तर
as dry lubricant
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
Which property of graphite is utilised in making electrodes?
The atomic number of an element Y is 16.
- What must an atom of Y do to achieve the nearest inert gas electron arrangement?
- Which inert gas is nearest to Y?
Name an alloy of lead and tin.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
State two important uses of following metal:
Uses of silver
With reference to the following metals state their use in daily life metal:
iron
With reference to the following metal state its use in daily life:
Magnesium
Name the following:
A halogen which is a solid at room temperature.
A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.
The most abundant element in the universe is ____________.
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)
The typical shine of metals is called ______.
Which metals are not solid at room temperature?
Why are metalloids called semimetals?
The metals which are found in both free state as well as combined state are ______.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
