Advertisements
Advertisements
प्रश्न
Which one of the following is not a chemical change ?
विकल्प
formation of curd
ripening of banana
sublimation of naphthalene
corrosion of photo frame
Advertisements
उत्तर
sublimation of naphthalene
Sublimation of naphthalene is not a chemical change because it only allows naphthalene to change its state from solid to vapour. No new compound is formed and the vapour can again be condensed to solid form.
APPEARS IN
संबंधित प्रश्न
A kind of matter which can sublime is
The best evidence for the existence and movement of particles in liquids was provided by :
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Define solvent.
How will you test whether a given solution is a colloidal solution ?
Name the process by which common salt is purified.
How will you separate a mixture containing sand and sugar ?
How will you separate iron pins from sand ?
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
How will you separate camphor, common salt and iron nails from their mixture ?
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
Naphthalene can be separated from sand :
Matter is made up of ______.
Define the term matter.
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
______ is so hard that it can scratch glass.
Solids possess very high kinetic energy.
Gases do not diffuse very easily.
Compressibility of solids: ______.
Write a scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
