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प्रश्न
Why is white phosphorus kept immersed under water?
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उत्तर
White phosphorus is kept immersed in water because it starts burning spontaneously when it comes into contact with air. But it does not react with water.
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संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
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Na, S, C, K, H
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Why does aluminium not react with water under ordinary conditions?
Describe the reaction of potassium with water. Write the equation of the reaction involved.
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
Name one metal more reactive and another less reactive than hydrogen.
Name one metal which displaces silver from silver nitrate solution and one which does not.
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
Which one among the following is an acidic oxide?
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
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Find the odd one out:
