Advertisements
Advertisements
प्रश्न
Which one is a kind of matter:
पर्याय
light
petroleum
sound
heat
Advertisements
उत्तर
petroleum
APPEARS IN
संबंधित प्रश्न
Gases have definite volume but no definite shape.
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
Name a metal which can be easily cut with a knife.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
What is the difference between colloids and suspensions ?
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.
Describe a method to separate a mixture of common salt and sand.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
One of the following does not undergo sublimation. This one is :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Name the metals that are used in jewellery.
Which among the following is not a matter?
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
The most reactive metal is ______.
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Evaporation does form bubbles.
Give an example of liquid in gas.
Define the term matter.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
