Advertisements
Advertisements
प्रश्न
Which one of the following is not a chemical change ?
पर्याय
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
The molecules can move freely anywhere in
Give one difference between atoms and molecules.
Name one element, one compound and one mixture.
What are pure substances ? Give two examples of pure substances.
State any two properties for believing that aluminium is a metal.
Name a metal which is yellow in colour.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
A solution contains 5.6 mL of alcohol mixed with 75 mL of water. Calculate the concentration of this solution.
Define solvent.
Name the different types of solutions. Give one example of each.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Name the process by which all the dye can be recovered from black ink.
Fill in the following blanks with suitable words :
Immiscible liquids are separated by using a .....................
Describe the method of separating a mixture containing common salt, sand and ammonium chloride.
Which of the following mixture cannot be separated by using water as the solvent ?
The dyes present in fountain pen ink can be separated by the technique of :
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?
Name the metals that are used in jewellery.
Liquids cannot be compressed and they have fixed volume.
The physical state of water at 373 K is ______.
