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प्रश्न
What special name is given to substances like aluminium oxide.
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उत्तर
Aluminium oxide reacts with both acids and bases and so it is called an amphoteric oxide.
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संबंधित प्रश्न
‘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’.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Write equation for the reaction of magnesium with oxygen.
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Complete and balance the following equation:
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
Why does aluminium not react with water under ordinary conditions?
Name two metals which cannot displace hydrogen from dilute acids.
What is the action of water on magnesium ? Write equation of the chemical reaction involved.
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
Name a metal which does not react with cold as well as hot water but reacts with steam.
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Write the name and formula of a molecule made up of three atoms of oxygen.
Write the chemical equation of the above process.
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Which of the following property is not responsible for copper to be used as electrical conduction wires?
