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प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It forms a base which is insoluble in water.
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उत्तर
Calcium
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संबंधित प्रश्न
Complete the following word equation:
Calcium + water → calcium hydroxide + _________
Give an equation to express the reaction between:
Calcium and water
Choose the correct option:
Hydrogen is evolved by the action of cold dil. HNO3 on
Based on the reactions of water on metals, arrange the following metals in increasing order of reactivity: iron, sodium, magnesium, zinc, calcium
Metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.
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.
Zn, Fe, Mg, and Na
Select the odd one out and justify your answer.
SO2, H2S, NH3, and CO3
Helium is preferred to hydrogen for filling balloons because it is:
Using dilute sulphuric acid how would you differentiate between:
Sodium sulphide and sodium carbonate.
How would you identify the gaseous products evolved.
