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प्रश्न
Choose the correct option:
Hydrogen is evolved by the action of cold dil. HNO3 on
पर्याय
Fe
Cu
Mg
Zn
उत्तर
Mg
APPEARS IN
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:
acid
Give an equation.
Which metal is preferred for collecting hydrogen from:
Write the balanced equation
Hot water
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.
Give a reason for the following.
Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.
Select the odd one out and justify your answer.
Zn, Fe, Mg, and Na
Which metal gives hydrogen with all of the following: water, acids, alkalis?
Which of the following metals does not give hydrogen with acids?
What do you observe when dilute sulphuric acid is added to Zinc granules.
Name the following.
A metal below iron but above copper in the activity series of metals which has no reaction with water.
