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प्रश्न
Select the odd one out and justify your answer.
Fe, Pb, Al and Zn
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उत्तर
Pb
Lead reacts with dilute sulphuric acid or HCl and forms an insoluble coating of lead sulphate or lead chloride.
The others react with dilute sulphuric acid or HCl to liberate hydrogen.
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संबंधित प्रश्न
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
Thin strips of magnesium, copper, and iron are taken.
Arrange these metals in descending order of reactivity.
Which metal is preferred for collecting hydrogen from steam? Write the balanced equation for the case.
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.
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.
Helium is preferred to hydrogen for filling balloons because it is:
Give a chemical test to distinguish between the following gases:
Hydrogen chloride and hydrogen sulphide
State why hydrogen is not prepared in the laboratory by the action of lead with dilute hydrochloric acid.
