Diffentiate between absorption and adsorption.
Concept: Matter (Substance)
Match the following.
| a. | Dalton | 1. | Hydrogen atom model |
| b. | Chadwick | 2. | Discovery of nucleus |
| c. | Rutherford | 3. | First atomic theory |
| d. | Neils Bohr | 4. | Plum pudding model |
| 5. | Discovery of neutrons |
Concept: Introduction of Atoms
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
Concept: History of Periodic Table: Early Attempts at the Classification of Elements
Example for liquid metal is ______.
Concept: History of Periodic Table: Early Attempts at the Classification of Elements
State whether true or false. If false, correct the statement.
Metals can gain electrons.
Concept: History of Periodic Table: Early Attempts at the Classification of Elements
Number of valence electrons in carbon is ______.
Concept: Chemical Bond
Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.
Concept: Chemical Bond
The element that would form anion by gaining electrons in a chemical reaction is ______.
Concept: Chemical Bond
Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.
Concept: Chemical Bond
How do atoms attain Noble gas electronic configuration?
Concept: Chemical Bond
Explain Octet rule with an example.
Concept: Chemical Bond
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
Concept: Chemical Bond
Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.
Concept: Chemical Bond
An atom X with atomic number 20 combines with atom Y with atomic number 8. Draw the dot structure for the formation of the molecule XY.
Concept: Chemical Bond
Why are Noble gases inert in nature?
Concept: Chemical Bond
Since metal carbonate and metal bicarbonate are basic, they react with acids to give salt and water with the liberation of ______.
Concept: Acids
Classify the various types of Acids based on their sources.
Concept: Acids
Two acids ‘A’ and ‘B’ are given. Acid A gives one hydrogen ion per molecule of the acid in solution. Acid B gives two hydrogen ions per molecule of the acid in solution.
- Find out acid A and acid B.
- Which acid is called the King of Chemicals?
Concept: Acids
What is neutralization reaction? Give an example.
Concept: Acids
