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प्रश्न
The elements which normally exist in the liquid state are :
पर्याय
bromine and iodine
mercury and chlorine
iodine and mercury
bromine and mercury
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उत्तर
bromine and iodine
Mercury is a metal that exists in liquid state and bromine is a non-metal that exists in liquid state.
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
What is the scientific name of particles which make up mater?
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.
The best evidence for the existence and movement of particles in liquids was provided by :
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
Name the property which allows metals to be hammered into thin sheets.
Choose the correct answer.
A 5 per cent sugar solution means that :
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Define Sol and give one example.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Describe a method to separate a mixture of camphor and sand.
How will you separate a mixture of iron filings, chalk powder and common salt ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
______ is used for industrial refrigeration and transporting frozen food.
The phenomenon of Evaporation takes place at the ______ of a liquid.
The fluidity of solids: ______.
Evaporation is always accompanied by ______ in temperature.
Define the term matter.
