ICSE ICSE Class 8 - CISCE Question Bank Solutions

ANSWER IN DETAIL

How are radioactive radiations useful in medicines ?

Hydrogen burns with a ______ flame and ______ sound is heard.

Fill in the blank

 Oxidation is the removal of ......................and addition of ....................

Fill in the blank

In redox reaction oxidation and reduction occur ............................

Indicate which of the following statement is true and which is false:

The removal of hydrogen from a substance is called reduction.

Fill in the blank

When a piece of copper is added to silver nitrate solution, it turns ............in colour.

Name the following:

The process in which oxygen is added or hydrogen is removed.

What is meant by Unsaturated.

What is meant by Saturated .

What is meant by Supersaturated solutions.

How will you obtain Magnesium oxide from magnesium.

Also give balanced equations for the reactions

How will you obtain  Silver chloride from silver nitrate.

Also give balanced equations for the reactions

How will you obtain Zinc chloride from zinc.

Also give balanced equations for the reactions

Define an oxidation reaction.

Define reduction.

Define redox reaction.

What do you observe when Magnesium ribbon is burnt in oxygen.

What is meant by the metal reactivity series ? State its importance, (any two points).

MULTIPLE CHOICE QUESTIONS

The process of adding oxygen to a substance is called

1. oxidation.
2. reduction.
3. displacement.
4. hydrogenation.

TRUE \ FALSE

Hydrogen is a good oxidizing agent.