MEDIUM
Earn 100

The balanced chemical reaction of potassium oxide with water is:

K2O+H2O→KOH

50% studentsanswered this correctly

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.

EASY
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The nature of solution obtained by dissolving soluble metal oxide in water is:
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.
EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals

Attempt the following:

The metal sodium is kept immersed in Kerosene oil in the school laboratory. Why it is not kept the open?

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

What are amphoteric oxides? Give an example.

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

Answer the following:

Why are highly reactive metals such as Aluminium is used as reducing agents?

EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Which of the following is amphoteric oxide?
EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Which of the following metal is the most reactive?
EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What are amphoteric oxides? 
EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What are amphoteric oxides?
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What happens when metals are burnt in the air? Give one example.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What are amphoteric oxides? Give two examples of amphoteric oxides.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals

Why is sodium kept immersed in kerosene oil? 

EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
Why should we not throw small pieces of sodium into a laboratory sink?
EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
The name of the metal that is immersed in kerosene oil is
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?

EASY
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
List one metal found in the free state in the earth’s crust and mention where it is located in the activity series.
MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals

The metals which can form amphoteric oxides with oxygen are:

MEDIUM
Science>Chemistry>Metals and Non-Metals>Chemical Properties of Metals
What are amphoteric oxides?
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.