Advertisements
Advertisements
प्रश्न
Why does this happen?
The fragrance of incense sticks lighted in one corner of a room spreads to the other corner.
Advertisements
उत्तर
Incense sticks release scented vapours that carry their scent. Since vapors are gases, their molecules disperse across the space. There are no forces preventing the gas molecules from disintegrating since they move so quickly. As a result, when incense sticks are lit in one corner of the room, their scent permeates the other.
संबंधित प्रश्न
Write the properties of this substance.
Soil
Write the properties of this substance.
Ink
Very Short Answer Type Question:
Name some substances which are made from plastics.
Very Short Answer Type Question:
Name two gases which are insoluble in water.
Short Answer Type Question:
Name the naturally occurring hardest substance known.
Long Answer Type Question:
Write an experiment to show that our palm is translucent.
Find the odd one out from the following:
Which type of the following materials is used for making the front glass (wind screen) of a car?
You are provided with the following materials – turmeric, honey, mustard oil, water, glucose, rice flour, groundnut oil.
Make any three pairs of substances where one substance is soluble in the other and any three pairs of substances where one substance remains insoluble in the other substances.
During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table below. Help them in filling the table.
| Name of the material |
Appearance (Hard/Soft) |
Transparency (Transparent/ Translucent/ Opaque) |
Floats/ Sinks in water |
Soluble/ Insoluble in water |
