Advertisements
Advertisements
प्रश्न
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.
उत्तर
(a) The oxide A2O3 is amphoteric, which can react with both acids and bases to form salt and water.
(b) The oxide BO is amphoteric, which can react with both acids and bases to form salt and water.
(c) Aluminium is a metal like A, which forms Al2O3 on reacting with oxygen.
(d) Zinc is a metal like B which forms ZnO on strongly heating in air (oxygen).
APPEARS IN
संबंधित प्रश्न
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
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 is the action of water on magnesium ? Write equation of the chemical reaction involved.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with eater.
Write the equation for the reaction of Zinc with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
Which of the following property is not responsible for copper to be used as electrical conduction wires?
