Advertisements
Advertisements
प्रश्न
Which of the following are compounds ?
- CO
- No
- NO
- Co
पर्याय
(i) and (ii)
(ii) and (iii)
(i) and (iii)
(i) and (iii)
(ii) and (iv)
Advertisements
उत्तर
(i) and (iii)
CO and NO are compounds. While CO is made up of carbon and oxygen, NO is made up of nitrogen and oxygen.
APPEARS IN
संबंधित प्रश्न
What are the two conditions for the interconversion of states of matter ?
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
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Name the property which allows metals to be hammered into thin sheets.
Which of the following does not have a fixed melting point/boiling point ?
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Name the process by which the various gases of the air are separated.
Name the process which can be used to recover salt from an aqueous salt solution.
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
Naphthalene can be separated from sand :
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
______ is not made of matter.
Solids do not flow.
Gas-solid is ______.
Define the term matter.
