Advertisements
Advertisements
प्रश्न
Give two examples of amphoteric oxides.
Advertisements
उत्तर
- Aluminium oxide (Al2O3)
- Zinc oxide (ZnO)
APPEARS IN
संबंधित प्रश्न
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
Diamond : electric insulator : : _______ : electric conductor
Which of the following oxide(s) of iron would be obtained on the prolonged reaction of iron with steam?
Example of an amphoteric oxide is:
Which of the following metals liberate hydrogen with 5% HNO3?
(i) Cu
(ii) Zn
(iii) Mn
(iv) Mg
Which one of the following metals does not react with cold as well as hot water?
Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?
Silver articles become black on prolonged exposure to air. This is due to the formation of
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
Which of the following reacts with cold water vigorously?
The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is ______.
Material: Copper wire, Iron nail, Beaker or Big test tube.
Chemicals: Ferrous Sulphate and Copper Sulphate Solution.
- Which reaction you will study with the help of the above material and solutions? Draw the diagram of the experiment arrangement.
- How do you identify that the reaction is carried out?
- Which type of reaction did you observe?
Answer the questions based on the figure below:
- Which reaction is shown in the figure?
- Which gas is evolved in the reaction?
- Give an example of reactants that rapidly show this reaction. Give equations.
- Give an example of reactants that do not react rapidly.
- In what condition will reactants of (c) part react? Give equation.
Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:
- MgO
- ZnO
- Al2O3
- Cao
Write a chemical equation showing the ionic products formed on dissolving potassium hydroxide in water.
On adding dilute sulphuric acid to a test tube containing a metal ‘X’, a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents the metal ‘X’?
