Advertisements
Advertisements
प्रश्न
Name two metals which form amphoteric oxides.
Advertisements
उत्तर
Aluminium and zinc are two metals that form amphoteric oxides.
APPEARS IN
संबंधित प्रश्न
A solution of CuSO4 in water is .................... in colour.
(a) Pink
(b) Blue
(c) Colourless
(d) Green
Iron is
(a) More reactive than zinc
(b) More reactive than aluminium
(c) Less reactive than copper
(d) Less reactive than aluminium
‘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’.
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
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.
What name is given to those metal oxides which show basic as well as acidic behaviour?
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.
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.
Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
Why does aluminium not react with water under ordinary conditions?
Name two metals which cannot displace hydrogen from dilute acids.
What special name is given to substances like aluminium oxide.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Name one metal which displaces silver from silver nitrate solution and one which does not.
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
Name a metal which does not react with cold as well as hot water but reacts with steam.
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.
