Give the definition of corrosion and rancidity with example?
Give the chemical formula of rust.
A greenish coating that develops on copper utensils is due to the formation of
- silver oxide
- silver carbonate
- silver sulphide
- silver bicarbonate
- Copper sulphate
- Copper carbonate
- Copper chloride
- Copper hydride
The metal Iron (Fe) when exposed to moist atmosphere forms hydrated Iron oxide as per the following reaction. This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction.
- H2O (moisture)
Silver articles become black on prolonged exposure to air. This is due to the formation of:
Silver articles turn black when exposed to the atmosphere for a few days due to the formation of silver sulphide.
Why is iron nail always rubbed with sandpaper before being used in any chemical experiment?
G. Pick the odd one out.
2. gold, copper, silver, iron
What is pig iron and how is it converted into steel ?
Which Type of Reaction is Corrosion?
What is rust known as chemically?
Which Metal Do Not Corrode Easily?
What is the formula of argentite?
How will you recognize the corrosion of silver?
Explain the factors which promote corrosion.
What is corrosion in simple words?
Why does water cause rust?
What are the harmful effects of corrosion?
The process of coating one metal with a thin layer of another metal is called ________ .
Assertion: Corrosion of iron is commonly known as rusting.
Reason: Corrosion of iron occurs in the presence of moist air.
(A) Both assertion and reason are false.
(B) Assertion is true, but the reason is false.
(C) Both assertion and reason are true. The reason is the correct explanation of assertion.
(D) Both assertion and reason are true. The reason is not the correct explanation of assertion.
Both assertion and reason are false.
Assertion is true, but the reason is false.
Both assertion and reason are true. The reason is the correct explanation of assertion.
Both assertion and reason are true. The reason is not the correct explanation of assertion.
Which of the following is/are example(s) of corrosion?
Rusting of iron
Tarnishing of copper
Liquefaction of ammonia
Tarnishing of silver
Due to corrosion, physical properties of metals such as malleability, ductility, and hardness are lost.
How electroplating with nickel can prevent iron from rusting?
The scientific name of rust is _______