Advertisements
Advertisements
Question
The boiling point of liquid argon is :
Options
– 196°C
– 183°C
–186°C
–193°C
Solution
–186°C
APPEARS IN
RELATED QUESTIONS
Match the following
Column A | Column B | ||
(a) | Molecules | (i) | Water boils |
(b) | 100° C | (ii) | Evaporation |
(c) | 0° C | (iii) | Changes from solid to gas |
(d) | At all temperatures | (iv) | Matter |
(e) | Camphor | (v) | Water freezes |
Differentiate between an atom and a molecule.
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 two processes which provide the best evidence for the motion of particles in matter.
State two characteristics of matter demonstrated by Brownian motion.
Explain why steel is used to make railway lines.
Define matter. Give four examples of matter.
What are the characteristics of matter?
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
Name a non-metal which is a good conductor of electricity.
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
Define the Emulsion Give one example.
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.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Naphthalene can be separated from sand :
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Wipe the board with a duster and then tap the duster against the table. What do you see?
Justify your answer.
Figure 1 | Figure 2 | Figure 3 |
![]() |
![]() |
![]() |
The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
The fluidity of solids: ______.