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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
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
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 ..............
Give reasons
Magnesium is used in fire works.
Give reasons
Aluminium is used in making aircrafts.
Fill in the blank
_______ is a soft metal.
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
State two important uses of following metal.
Uses of copper
State two important uses of following metal
Uses of tin
State the position of the following in the periodic table:
Alkali metals
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Write scientific reason.
Generally the ionic compounds have high melting points.
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
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
Which one of the following is an example for a metal?
Can you store pickle in an aluminium utensil? Give reason.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
