Advertisements
Advertisements
प्रश्न
One of the following does not undergo sublimation. This one is :
विकल्प
camphor
dry ice
silica
iodine
उत्तर
silica
Silica does not sublime on heating.
APPEARS IN
संबंधित प्रश्न
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Which of the following are ‘pure substances’ ?
Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
The elements which normally exist in the liquid state are :
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
State whether the following statement is true or false :
Sponge is an example of solid sol.
Name the different types of solutions. Give one example of each.
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Name the process by which common salt is obtained from sea-water.
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
Explain the meaning of the term ‘matter’.
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
Which among the following ______ will get attracted to by magnet?
Diffentiate between absorption and adsorption.
______ is so hard that it can scratch glass.
Give an example of a molecule.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
Define the term matter.
