Advertisements
Advertisements
Question
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
Advertisements
Solution
Steam does not belong to the given set. While steam is a compound, all others are elements.
APPEARS IN
RELATED QUESTIONS
Liquids have definite volume but do not have definite shape.
Fill in the blank :
The substances which can flow are called ________
What are the characteristics 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
Name a non-metal which is a good conductor of electricity.
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
Which of the following is not an element ?
“Is malleable and ductile” best describes :
Calculate the concentration of a solution which contains 2.5 g of salt dissolved in 50 g of water.
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
Name the process by which the various gases of the air are separated.
Write a method to separate a mixture of sand and potash alum.
______ is not made of matter.
Name the metals that are used in jewellery.
A standard sheet of paper is about ______ of atoms thick
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
Solids possess very high kinetic energy.
Compressibility of solids: ______.
Examples of foam are ______.
