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प्रश्न
What is meant by saying that metals are sonorous ?
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उत्तर
Metals are sonorous because they generate sound when hit.
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संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Name a metal which forms amalgams.
Name a metal which is yellow in colour.
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
The elements which normally exist in the liquid state are :
Which of the following does not have a fixed melting point/boiling point ?
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Define solute.
Define Sol and give one example.
Define solubility of a substance. How does it vary with temperature ?
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Matter is made up of ______.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Liquids cannot be compressed and they have fixed volume.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Evaporation does form bubbles.
Examples of foam are ______.
Define the term matter.
