Advertisements
Advertisements
प्रश्न
How will you separate a mixture containing saw dust, naphthalene and iron filings?
Advertisements
उत्तर
When a magnet is brought near the mixture containing saw dust naphthalene and iron filings, it attracts the iron filings. Thus iron filings are separated.
The mixture of naphthalene and saw dust are put in a china dish and covered with a perforated asbestos sheet. An inverted funnel is placed over the asbestos sheet.
The open end of the stem of the funnel is closed, using cotton wool. The china dish is heated. The pure vapours of naphthalene solid pass through the holes in the asbestos sheet and condense on the inner side of the funnel. The saw dust is left in the china dish.
APPEARS IN
संबंधित प्रश्न
List the points of differences between homogeneous and heterogeneous mixtures with examples.
Fill in the blank
Mixtures can be ________ or _______
The ‘sea water’ can be classified as a homogeneous mixture as well as a heterogeneous mixture ? Comment.
Define the following:
Solution
Give reason:
Why sulphur does dissolve when carbon disulphide is added to a mixture of iron and sulphur but not when it is added to iron sulphide?
Tick (√) the correct alternative from the choice given for the following statement:
A heterogeneous mixture is
State the technique involved in separating the following:
Iodine crystals and potassium chloride
Suggest separation technique(s) one would need to employ to separate the following mixture.
Mercury and water
Name the process associated with the following
Settling of sand when a mixture of sand and water is left undisturbed for some time.
You are given two samples of water labelled as ‘A’ and ‘B’. Sample ‘A’ boils at 100°C and sample ‘B’ boils at 102°C. Which sample of the water will not freeze at 0°C? Comment.
