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प्रश्न
What is meant by saying that metals are lustrous ?
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उत्तर
Metals are said to be lustrous because of their property to shine.
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संबंधित प्रश्न
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
How would you confirm that a colourless liquid given to your is pure water ?
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Explain what happens when a beam of light is passed through a colloidal solution.
Explain what happens when a beam of light is passed through a colloidal solution.
What is meant by the concentration of a solution ?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
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Name the source from which nitrogen and oxygen are obtained on a large scale.
Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
Immiscible liquids are separated by using a .....................
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How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
Naphthalene can be separated from sand :
Which of the following cannot be separated from air by the process of fractional distillation ?
What type of matter glass is?
Give an example of liquid in gas.
Define the term matter.
