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प्रश्न
Write equation for the reaction of sodium with oxygen.
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उत्तर
4Na (s) + O2 (g) → 2Na2O (s)
Sodium Oxygen Sodium oxide
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संबंधित प्रश्न
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
Differentiate between metal and non-metal on the basis of their chemical properties.
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Give reason for the following:
Blue colour of copper sulphate solution is destroyed when iron filings are added to it.
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
Name one metal which displaces copper from copper sulphate 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
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen
State and explain the reaction, if any, of the following metals with a solution of copper sulphate:
(a) Gold
(b) Copper
(c) Zinc
(d) Mercury
In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?
Name a metal which does not react with cold as well as hot water but reacts with steam.
Answer the following question:
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is metal or a non - metal. Explain with a proper example.
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
Tungsten wire is used in electric bulbs.
