Advertisements
Advertisements
प्रश्न
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Advertisements
उत्तर
All the elements can be divided into following three groups:
- Metals: Examples: Aluminium and copper
- Non-metals: Examples: Potassium and calcium
- Metalloids: Examples: Arsenic and antimony
APPEARS IN
संबंधित प्रश्न
Intermolecular space is maximum in .......... less in ............ and the least in .........
Name the terms for the change of a solid into liquid.
Which one is a kind of matter:
Explain why steel is used to make railway lines.
The best evidence for the existence and movement of particles in liquids was provided by :
Name the property which enables metals to be drawn into wires.
Name a metal which forms amalgams.
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
How is scrap iron separated from a heap of waste materials in factories?
Naphthalene can be separated from sand :
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Explain the meaning of the term ‘matter’.
Wipe the board with a duster and then tap the duster against the table. What do you see?
Which among the following ______ will get attracted to by magnet?
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Give some examples of the Tyndall effect observed in your surroundings?
Solid is an arrangement of particles ______.
Gases do not diffuse very easily.
Gas-solid is ______.
