Advertisements
Advertisements
प्रश्न
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
Advertisements
उत्तर
(c) an amphoteric oxide
Zinc oxide can react with both acids and bases to form salt and water.
APPEARS IN
संबंधित प्रश्न
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Differentiate between metal and non-metal on the basis of their chemical properties.
Why are metals called electropositive elements whereas non-metals are called electronegative elements?
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
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?
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 Magnesium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Name one metal which displaces copper from copper sulphate solution and one which does not.
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
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?
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
What is the characteristic of the electronic configuration of noble gases?
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
Which one among the following is an acidic oxide?
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
