EASY
Earn 100

What is the atomic number of copper?

Important Questions on Metals and Non-Metals

EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals

Give reason:

Metals like sodium and potassium are stored under oil.

MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
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.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What are amphoteric oxides? Give an example. Write balanced chemical equations to justify your answer.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Describe the reaction of potassium with water. Write the equation of the reaction involved.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What is the action of water on sodium? Write the equations of the chemical reactions involved.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Why is sodium kept immersed in kerosene oil?
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
How would you show that silver is chemically less reactive than copper?
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Can we keep sodium immersed underwater? Why?
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
With the help of examples describe how metal oxides differ from non-metal oxides.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Name two metals which can displace hydrogen from dilute acids
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Name two metals which cannot displace hydrogen from dilute acids.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Name two metals which form amphoteric oxides.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Why does aluminium not react with water under ordinary conditions?
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium.
HARD
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
A copper plate was dipped in AgNO3 solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-silicon and eka-aluminium.
(a) Name the elements which have taken the place of these elements.
(b) Mention the group and the period of these elements in the modern periodic table.
(c) How many valence electrons are present in each one of them?