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प्रश्न
Name a metal which is soft and a non-metal which is hard.
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उत्तर
Sodium is a soft metal, whereas diamond is a hard non-metal.
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संबंधित प्रश्न
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
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- 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 one element, one compound and one mixture.
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
What is the other name for impure substances ? Give two examples of impure substances.
“Is malleable and ductile” best describes :
Choose the correct answer.
A 15% alcohol solution means :
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Describe a method to separate a mixture of common salt and sand.
How will you separate camphor, common salt and iron nails from their mixture ?
With the help of a labelled diagram, describe the method of separating ammonium chloride from a mixture of ammonium chloride and common salt. Mention the difference in the properties of ammonium chloride and sodium chloride which has made this separation possible.
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Complete the given analogy.
Murukku from hot oil: ______:: Coffee powder residue from decoction: ______
What type of matter glass is?
Solid is an arrangement of particles ______.
Define the term matter.
