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प्रश्न
Name the metal which has been placed at the bottom of the reactivity series.
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उत्तर
Gold (Au)
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संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Why are metals called electropositive elements?
Write an equation for the reaction of:
Sodium with oxygen
Write an equation for the reaction of:
Magnesium with oxygen
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
How do metals react with hydrogen? Explain with an example.
What is the action of water on magnesium? Write equations of the chemical reactions involved.
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
You are given samples of three metals - sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Write the equation for the reaction of:
Aluminium with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
Write the equation for the reaction of:
Iron with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
The metals which can produce amphoteric oxides are ______.
Name a metal for the given case:
It does not react with cold as well as hot water but reacts with steam.
Name a metal for the given case:
It does not react with any physical state of water.
Calcium floats over water during the reaction with water. Give reason.
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
Arrange the following metals in the increasing order of their reactivities:
Copper, Zinc, Aluminium, and Iron
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
