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प्रश्न
Fill in the blank
Liquids have a definite ______
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उत्तर
Liquids have a definite Volume.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Differentiate between an atom and a molecule.
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Name the property which enables metals to be drawn into wires.
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Which of the following can be called a suspension ?
Describe a method to separate a mixture of common salt and sand.
How will you separate a mixture of iron filings, chalk powder and common salt ?
What is fractional distillation ? What is the use of fractionating column in fractional distillation ?
The best way to recover sugar from an aqueous sugar solution is :
Name the metals that are used in jewellery.
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 phenomenon of Evaporation takes place at the ______ of a liquid.
Gas-solid is ______.
