Advertisements
Advertisements
प्रश्न
Which of the following are compounds ?
- CO
- No
- NO
- Co
विकल्प
(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
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 |
Solids have definite shape and definite volume.
What are the conditions for 'something' to be called 'matter'?
What are the characteristics of matter?
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
State any two properties for believing that aluminium is a metal.
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
The elements which normally exist in the liquid state are :
What happens when the temperature of a saturated sugar solution is increased ?
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Name the different types of solutions. Give one example of each.
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Explain how, nitrogen , oxygen and argon gases are separated from air.
Atoms or groups of atoms having a charge are called ______.
The movement of particles in liquids is ______.
Compressibility of solids: ______.
Define the term matter.
