Please select a subject first
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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) 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
Humidity relative to dew point temperature is 100%.
Concept: undefined >> undefined
The unit of absolute humidity is kg/m3.
Concept: undefined >> undefined
The escape velocity on the moon is less than that on the earth.
Concept: undefined >> undefined
Write an Explanation.
Magnification
Concept: undefined >> undefined
Write an Explanation.
Magnification
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
Drops of water can be seen accumulating on the glass of vehicles in the early hours of winter.
Concept: undefined >> undefined
Write scientific reason.
During winter season, we may have observed a white trail at the back of the aeroplane flying high in the clear sky or sometimes it may not get formed.
Concept: undefined >> undefined
Write scientific reason.
Satellite launch vehicles are used to place satellites in their specific orbits.
Concept: undefined >> undefined
Write scientific reason.
The Launch vehicles are very costly.
Concept: undefined >> undefined
Write a short note.
Dew point temperature
Concept: undefined >> undefined
Observe the given figure and answer these following questions.
The orbit of a planet moving around the Sun
- What is the conclusion about the orbit of a planet?
- What is the relation between velocity of planet and distance from sun?
- Explain the relation between areas ASB, CSD and ESF.
Concept: undefined >> undefined
Describe the merits of Mendeleev’s periodic table?
Concept: undefined >> undefined
