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प्रश्न
What name is given to those metal oxides which show basic as well as acidic behaviour?
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उत्तर
Metal oxides that show basic as well as acidic behaviour are called amphoteric oxides. Aluminium oxide is an example.
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संबंधित प्रश्न
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
Name the following:
Metals which forms an amphoteric oxide.
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
Name the metal which has been placed just below copper in the reactivity series.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
Why does aluminium not react with water under ordinary conditions?
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
Name a metal which does not react with cold as well as hot water but reacts with steam.
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Write the chemical equation of the above process.
Which one among the following is an acidic oxide?
A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
