Advertisements
Advertisements
प्रश्न
What name is given to those metal oxides which show basic as well as acidic behaviour?
Advertisements
उत्तर
Those metal oxides that exhibit both basic and acidic behaviour are known as amphoteric oxides.
APPEARS IN
संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
What would you observe when zinc is added to a solution of iron (II) sulphate? Write the chemical reaction that takes place.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
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.
What will happen if a strip of zinc is immersed in a solution of copper sulphate?
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.
Name two metals which cannot displace hydrogen from dilute acids.
You are given samples of three metals − sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.
Name one metal more reactive and another less reactive than hydrogen.
Out of aluminium, copper, calcium and tin, the most reactive metal is:
(a) aluminium
(b) copper
(c) tin
(d) calcium
An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
A zinc plate was kept in a glass container having CuSO4 solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved.
What are noble gases
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
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.
Why is acidified water considered to be a good conductor of electricity?
