Advertisements
Advertisements
प्रश्न
Give a reason why oiling or greasing is done on the exposed moving iron parts of machinery and not preferred on heavy stationary iron parts.
Advertisements
उत्तर
Oiling or greasing is done on the exposed moving iron parts of machinery to avoid rusting and reducing friction whereas it is not preferred on heavy stationary iron parts as red lead oxide paint is used in heavy stationary iron.
APPEARS IN
संबंधित प्रश्न
Rust is a hydrated oxide of iron which is
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
A gas used to sterilisation of drinking water is ________
What happens when the mercuric oxide is heated?
Classify Copper oxide. Also give a balanced equation to prepare it.
Classify Magnesium oxide. Also give a balanced equation to prepare it.
How will you prove that oxide formed by sulphur is acidic in nature?
State why galvanization, tinning and chromeplating are used as three different processes for coating specific articles for prevention of rusting.
State a specific reason for using lead in bullets
Give reason for the following:
Galvanized steel is not used for articles used for edible applications.
Give word equation for the reaction of Non-metal:
Sulphur
Give word equation for the reaction of Non-metal:
carbon
Give word equation for the reaction of metal is:
sodium
Give word equation for the reaction of metal is:
calcium
Give word equation for the reaction of metal is:
magnesium with oxygen
Name the following:
The product formed on oxidation of phosphorus.
Name the following:
The chemical name of rust.
