Question
What are amphoteric oxides? Give two examples of amphoteric oxides.

Answer

  1. The oxides that form salt and water by reacting with both acid and base are known as amphoteric oxides.
  2. They show both acidic as well as basic characteristics.
  3. Aluminium oxide and zinc oxide are amphoteric oxides as they react with acids as well as bases.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Complete the following chart:
Substance obtained by microbial processingRoles
(i)Citric acid_________________
(ii)Ascorbic acid_________________
(iii)Beta carotene_________________
(iv)Glycolipids_________________
(v)Vanillin_________________
(vi)Xylitol_________________
An object of height 4.25mm is placed at a distance of 10cm from a convex lens of power +5D. Find:
  1. Focal length of the lens, and
  2. Size of the image.
How does the growth of any living organism occur? Does the number of cells in their body increase? If yes, how?
  1. Give the names and formulae of one metal chloride and one non-metal chloride.
  2. State an important property in which these metal chloride and non-metal chloride differ.
  3. Why do they differ in this property?
Draw a neat labelled diagram : Magnetic separation method
Write a short note.
Homologous series
An organic acid $X$ is a liquid, which often freezes during winter time in cold countries, having the molecular formula $C_2H_4O_2.$ On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound $Y$ with a sweet smell is formed.
  1. Identify $X$ and $Y.$ Also write their formulae showing the functional group present in them.
  2. Write a chemical equation for the reaction involved.
A converging lens of focal length 5cm is placed at a distance of 20cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
Column AColumn B
(1) Clouds over India(a) Low Earth Orbit
(2) Global communication(b) PSLV
(3) Launch vehicle made by ISRO(c) Communication satellite
(4) International Space Station(d) EDUSAT
(5) Navigational satellite(e) Weather satellite
(f) Medium Earth Orbit
In a domestic electric supply, if two bulbs are connected in series instead of parallel, what will happen if the filament of one of the bulbs breaks?