Advertisements
Advertisements
प्रश्न
How would you show that silver is chemically less reactive than copper?
Advertisements
उत्तर
When silver is dipped in a copper sulphate solution, no reaction occurs. This means silver cannot displace copper from the copper sulphate solution. Hence, it shows that silver is chemically less reactive than copper.
APPEARS IN
संबंधित प्रश्न
Write equations for the reactions of iron with steam.
Food cans are coated with tin and not with zinc because ______.
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
How do non-metals react with hydrogen? Explain with an example.
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?
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
Name a metal which It does not react with any physical state of water?
When calcium metal is added to water, the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
