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प्रश्न
How do metals react with hydrogen? Explain with an example.
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उत्तर
Metals generally do not react with hydrogen. But some reactive metals like sodium, potassium, calcium and magnesium can force the hydrogen atom to accept the electrons given by them and form salt-like ionic solid compounds called metal hydrides.
For example:
2Na(s) + H2(g) → 2NaH(s)
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संबंधित प्रश्न
Why is sodium kept immersed in kerosene oil?
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Differentiate between metal and non-metal on the basis of their chemical properties.
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 basic oxide.
Na, S, C, K, H
What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
Can we keep sodium immersed under water? Why?
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Name one metal which displaces copper from copper sulphate solution and one which does not.
Name one metal which displaces silver from silver nitrate solution and one which does not.
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
