Advertisements
Advertisements
प्रश्न
How will you separate a mixture of iron filings and powdered carbon ?
Advertisements
उत्तर
We can separate a mixture of iron filings and powdered carbon by using a magnet. The principle behind the separation of iron fillings and powdered carbon is the property of iron to get attracted by magnets. When the magnet is brought close to the mixture, iron fillings are attracted by the magnet and get collected on the surface of the magnet. In the process, powdered carbon is left behind as residue.
APPEARS IN
संबंधित प्रश्न
The inter-molecular space is maximum in
Define the term matter. What is it composed of?
Explain why air is used to inflate tyres.
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
Which one of the following is not a metalloid ?
The elements which normally exist in the liquid state are :
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.
How will you test whether a given solution is a colloidal solution ?
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Name the process which can be used to recover salt from an aqueous salt solution.
How will you separate iron pins from sand ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Name one pair of liquids which can be separated by using a separating funnel.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
The movement of particles in liquids is ______.
Gas-solid is ______.
Define the term matter.
