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प्रश्न
Name the metals that are used in jewellery.
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उत्तर
Silver and gold are used for making jewels and for decorative purposes.
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संबंधित प्रश्न
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
State two characteristics of matter demonstrated by Brownian motion.
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Name a metal which is soft and a non-metal which is hard.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
State whether the following statement is true or false :
Bread is an example of solid foam.
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
Define solubility of a substance. How does it vary with temperature ?
The dyes present in fountain pen ink can be separated by the technique of :
The movement of particles in liquids is ______.
