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The square of its period of revolution around the sun is directly proportional to the _______ of the mean distance of a planet from the sun.
Concept: undefined >> undefined
The elements from the zero group are called _______.
Concept: undefined >> undefined
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The chemical reaction in which two or more products are formed from a single reactant is called ______ reaction.
Concept: undefined >> undefined
Humid and dry nature of air depends on the ______.
Concept: undefined >> undefined
Vapours in air condenses to form ______.
Concept: undefined >> undefined
All distances parallel to the principal axis are measured from the _______.
Concept: undefined >> undefined
All distances parallel to the principal axis are measured from the _______.
Concept: undefined >> undefined
Eka boron : Scandium : : Eka Aluminum : _______
Concept: undefined >> undefined
Two elements in the same position : demerit of Newland's octaves : : place for Isotopes : _______
Concept: undefined >> undefined
Relative humidity greater than 60% : humid air : : relative humidity less than 60% : _______
Concept: undefined >> undefined
Find the odd one out and give its explanation.
Concept: undefined >> undefined
Find the odd one out and give its explanation.
Concept: undefined >> undefined
What does the existence of drops of water on the leaves of a tree in the morning indicate?
Concept: undefined >> undefined
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
Match the columns.
| Column A | Column B |
| 1) Dry air | a) 4 °C |
| 2) Humid air | b) Relative humidity 100% |
| 3) Saturated air/Dew point temperature | c) Relative humidity below 60% |
| 4) Maximum density of water | d) Relative humidity above 60% |
| e) – 4 °C |
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
The dew point temperature does not depend on the amount of vapor in the air.
Concept: undefined >> undefined
