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प्रश्न
Choose the correct option:
Hydrogen is evolved by the action of cold dil. HNO3 on
विकल्प
Fe
Cu
Mg
Zn
उत्तर
Mg
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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.
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from dilute HCl.
From the knowledge of activity series, name a metal which shows the following properties:
It forms a base which is insoluble in water.
Give an equation to express the reaction between:
Steam and red hot iron
Give reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
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.
Select the odd one out and justify your answer.
SO2, H2S, NH3, and CO3
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Correct the following statement:
Conc. H2SO4 reacts with zinc to liberate hydrogen.
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
