मराठी

What are amphoteric oxides?

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प्रश्न

What are amphoteric oxides?

अति संक्षिप्त उत्तर
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उत्तर

Those metal oxides which show basic as well as acidic behaviour are known as amphoteric oxides.

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पाठ 3: Metals and Non-metals - EXERCISES [पृष्ठ ५६]

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एनसीईआरटी Science [English] Class 10
पाठ 3 Metals and Non-metals
EXERCISES | Q 6. 1 | पृष्ठ ५६
लखमीर सिंह Chemistry Part 2 [English] Class 10
पाठ 3 Metals and Non-metals
Exercise 1 | Q 39. (a) (i) | पृष्ठ १६५

संबंधित प्रश्‍न

Give reason:

Sodium, potassium and lithium are stored under oil.


Diamond : electric insulator : : _______ : electric conductor


Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?


Silver articles become black on prolonged exposure to air. This is due to the formation of


When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z and also write the reaction involved.


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 ______.


Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?


Material: Copper wire, Iron nail, Beaker or Big test tube.

Chemicals: Ferrous Sulphate and Copper Sulphate Solution.

  1. Which reaction you will study with the help of the above material and solutions? Draw the diagram of the experiment arrangement.
  2. How do you identify that the reaction is carried out?
  3. Which type of reaction did you observe?

Out of three metals, sodium, calcium and aluminium, which metal reacts most with water? Give the equation of reaction with all three metals.


Answer the questions based on the figure below:

  1. Which experiment setup is demonstrated in the figure?
  2. What do you conclude after the reactions? Name reaction.

Answer the questions based on the figure below:

  1. Which reaction is shown in the figure?
  2. Which gas is evolved in the reaction?
  3. Give an example of reactants that rapidly show this reaction. Give equations.
  4. Give an example of reactants that do not react rapidly.
  5. In what condition will reactants of (c) part react? Give equation.

Keerti added dilute Hydrochloric acid to four metals and recorded her observations as shown in the table given below:

Metal Gas Evolved
Copper Yes
Iron Yes
Magnesium No
Zinc Yes

Select the correct observation(s) and give chemical equation(s) of the reaction involved.


Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are:

  1. MgO
  2. ZnO
  3. Al2O3 
  4. Cao

Select the appropriate state symbols of the products given as X and Y in the following chemical equation by choosing the correct option from table given below: 

\[\ce{Zn_{(s)} + H_2SO_{4(l)} ->ZnSO_{4(X)} + H_{2(Y)}}\]


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’?


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