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Match the columns.
| Column A | Column B |
| 1) Eka-aluminium | a) Scandium |
| 2) Eka-Silicon | b) Gallium |
| 3) Eka- boron | c) Germanium |
| d) Beryllium |
Concept: undefined >> undefined
Match the columns.
| Column A | Column B |
| 1) Triads | a) Mendeleev |
| 2) Octave | b) Dobereiner |
| 3) Atomic number | c) Thomson |
| 4) Atomic mass number | d) Moseley |
| e) Newland |
Concept: undefined >> undefined
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Match the columns.
| Column A | Column B |
| 1) Triads | a) Mendeleev |
| 2) Octave | b) Dobereiner |
| 3) Atomic number | c) Thomson |
| 4) Atomic mass number | d) Moseley |
| e) Newland |
Concept: undefined >> undefined
Write the name.
The family of group 1 elements.
Concept: undefined >> undefined
Write the name.
The family of group 1 elements.
Concept: undefined >> undefined
Write the name.
The family of elements having zero valency.
Concept: undefined >> undefined
Write the name.
The family of elements having zero valency.
Concept: undefined >> undefined
Write an Explanation.
Critical angle
Concept: undefined >> undefined
Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.
Concept: undefined >> undefined
Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.
Concept: undefined >> undefined
Write scientific reason.
The velocity of spacecraft at the earth's surface must be greater than the escape velocity of the earth.
Concept: undefined >> undefined
Draw a neat and labelled diagram for dispersion of light.
Concept: undefined >> undefined
Classify the following metals based on their reactivity.
Cu, Zn, Ca, Mg, Fe, Na, Li, Hg
| More reactive | Moderately reactive | Less reactive |
Concept: undefined >> undefined
Explain the following reaction with the balanced equation.
Sodium burns in air
Concept: undefined >> undefined
Explain the following reaction with the balanced equation.
Reaction of aluminium with oxygen
Concept: undefined >> undefined
Explain the following reaction with the balanced equation.
Magnesium reacts with dil HCl
Concept: undefined >> undefined
Explain the following reaction with the balanced equation.
Sulphur burns in air
Concept: undefined >> undefined
Describe the merits of Mendeleev’s periodic table?
Concept: undefined >> undefined
Describe the merits of Mendeleev’s periodic table?
Concept: undefined >> undefined
Rainbow is a beautiful natural phenomenon. It is the combined effect of a natural three processes together produced by light. Write it into the circle.
Concept: undefined >> undefined
