Advertisements
Advertisements
प्रश्न
What is meant by saying that metals are lustrous ?
Advertisements
उत्तर
Metals are said to be lustrous because of their property to shine.
APPEARS IN
संबंधित प्रश्न
The inter-molecular space is maximum in
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
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
Give reason why copper metal is used for making electric wires.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
“Is malleable and ductile” best describes :
Out of a colloid, solution and a suspension :
which one has the largest particles ?
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
One of the following is a solid foam. This one is :
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
Explain how, nitrogen , oxygen and argon gases are separated from air.
Which among the following ______ will get attracted to by magnet?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Atoms or groups of atoms having a charge are called ______.
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Solid is an arrangement of particles ______.
Gases do not diffuse very easily.
Define the term matter.
