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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
Complete the following word equation:
Calcium + water → calcium hydroxide + _________
A small piece of calcium metal is put into a small trough containing water. There is effervescence and white turbidity is formed.
What do you observe when a few drops of red litmus solution are added to the turbid solution.
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.
Select the odd one out and justify your answer.
SO2, H2S, NH3, and CO3
Which metal gives hydrogen with all of the following: water, acids, alkalis?
Using dilute sulphuric acid how would you differentiate between:
Copper and magnesium
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.
