हिंदी

Name Two Alkalies that Can Displace Hydrogen. Give Balanced Equations for the Same. Why Are the Metals You Have Used Considered to Have Unique Nature? - Chemistry

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प्रश्न

Name two alkalies that can displace hydrogen. Give balanced equations for the same. Why are the metals you have used considered to have a unique nature?

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उत्तर

NaOH and KOH

Zn + 2NaOH → Na2ZnO2 + H2

Zn + 2KOH → K2ZnO2 + H2

Metals such as zinc, lead, and aluminium have a unique nature. They react with acids and can even react with hot alkalis to form hydrogen and soluble salt.

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Application of Activity Series in the Preparation of Hydrogen
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 6: Study of the First Element - Hydrogen - Exercise 6 (C) [पृष्ठ १०८]

APPEARS IN

सेलिना Concise Chemistry [English] Class 9 ICSE
अध्याय 6 Study of the First Element - Hydrogen
Exercise 6 (C) | Q 11 | पृष्ठ १०८

संबंधित प्रश्न

From the knowledge of activity series, name a metal which shows the following properties:

It displaces hydrogen from hot water.


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What do you observe when a few drops of red litmus solution are added to the turbid solution.


Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: iron, sodium, magnesium, zinc, calcium


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.

  1. Name the substances A and B.
  2. Give two tests for the colourless liquid formed in the experiment.
  3. What happens to substance A when it reacts with hydrogen? Give reasons for your answer.
  4. Write an equation for the reaction between hydrogen and substance A.
  5. 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


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.


Name the following.

A metal which cannot be used for the preparation of hydrogen using dilute acids.


Name the following.

The salt formed when aluminium reacts with potassium hydroxide, during the preparation of hydrogen from alkalis.


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