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प्रश्न
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
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उत्तर
Cu
Metals more reactive than hydrogen can displace it from acids.
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संबंधित प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from hot water.
Hydrogen can be prepared with the metal zinc by using: alkali
Give an equation.
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
Write a balanced equation for the reaction named metal with (i) boiling water (ii) steam.
What do you observe when hydrogen gas is passed through a soap solution?
When hydrogen is passed over a black solid compound A, the products are a 'colorless liquid' and a 'reddish-brown metal B'.
Substance B is divided into two parts each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.
- Name the substances A and B.
- Give two tests for the colourless liquid formed in the experiment.
- What happens to substance A when it reacts with hydrogen? Give reasons for your answer.
- Write an equation for the reaction between hydrogen and substance A.
- Is there any reaction between substance B and dilute hydrochloric acid? Give reasons for your answer.
Correct the following statement:
Very dilute nitric acid reacts with iron to produce hydrogen.
Correct the following statement:
Conc. H2SO4 reacts with zinc to liberate hydrogen.
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.
