Advertisements
Advertisements
प्रश्न
The dyes present in fountain pen ink can be separated by the technique of :
विकल्प
fractional distillation
infrared photography
crystallisation
chromatography
Advertisements
उत्तर
chromatography
Chromatography is the technique used to separate the contents of a mixture, where solute particles are in extremely small quantity.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
The inter-molecular space is maximum in
The molecules can move freely anywhere in
What elements do the following compounds contain ?
Sugar, Common salt
State two physical properties on the basis of which metals can be distinguished from non-metals.
Give reason why graphite is used for making elecrode in a dry cell.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
Which one of the following is not a metalloid ?
Choose the correct answer.
A 15% alcohol solution means :
In what respects does a true solution differ from a colloidal solution ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
How will you separate a mixture of iron filings, chalk powder and common salt ?
The material which is added to water during purification process at the water works so as to disinfect it is :
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
______ is not made of matter.
Diffentiate between absorption and adsorption.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
A teabag placed in a cup of hot water will diffuse into the water.
