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प्रश्न
Name two solid, two liquid and two gaseous elements at the room temperature.
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उत्तर
Aluminium and copper are two elements that are solid at room temperature. Both bromine and mercury are liquid at room temperature. Nitrogen and hydrogen are two elements that are gaseous at room temperature.
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संबंधित प्रश्न
State two characteristics of matter demonstrated by Brownian motion.
When a gas jar containing air is inverted over a gas jar containing bromine vapour, the red-brown bromine vapour diffuse into air. Explain how bromine vapour diffuse into air.
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The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
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(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
______ is not made of matter.
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
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Name a non-metal which exists as a liquid at room temperature.
Atoms or groups of atoms having a charge are called ______.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
The fluidity of solids: ______.
Define the term matter.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
