Which pair of substance float in water
Those substances that have less density than water floats on water surface such as plastic ball and feather.
All metals are ----------- of heat and electricity.
All metals are good conductor of heat and electricity.
Hardest known natural substance is
diamond is the hardest known natural substance due to arrangement of molecule of it.
Which is soluble in water?
Sugar is soluble in water while mustard oil, sand and plastic is insoluble in water.
Chair, table and plough are made up of
Chair, table and plough are made up of wood obtained from plants.
Which one is a combustible substance?
Those substances that burn easily are called combustible substance. Ghee is animal fat, which is combustible in nature.
Which is a magnetic material?
Those substances that are attracted by magnet are called magnetic material. Iron is a magnetic material.
Which is lighter than water?
Petrol is lighter than water as it floats on water surface when mixed with water.
Properties of metal due to which it can be beaten into thin sheet is called
The properties of metal due to which metal can be beaten into thin sheet is called as malleability. Gold is most malleable metal.
Which one is not a transparent object?
The object through which light passes easily are called as transparent object. Clean glass, glass and thin sheet of plastic are transparent while muddy water is translucent.
The substance through which light do not pass is called
The substance through which light do not pass easily is called as opaque object. Brick, book etc are example of opaque objects.
Which one is a compound?
Iron, silver and gold are elements while common salt is compound of sodium and chlorine.
Metallic object loose their lustre due to
The action of air, water on metal surface is called as corrosion. Due to corrosion metallic objects lose their lustre
The ability of solute a to get dissolved in to a solvent is called
The ability of a solute to get dissolved in a solvent is called as solubility.
Rusting of iron takes place in presence of
Rusting of iron takes place in presence of air and moisture to change the surface of metals.
Making orderly arrangement of materials is called
The sorting of objects into groups with each group having its own characteristic properties is called classification of objects. All the objects having similar characteristics properties are placed in one group different groups. And the objects having different properties are placed in different groups.
1. The classification of objects into groups makes it easier to locate them and work with them.
2. If we know the properties of any one member of the group, we can get an idea of the properties of the other members of this group.
Newspaper, a book, a copy, a diary are made up of
Newspaper, a book, a copy, a diary are made up of paper obtained from plants.
CNG stands for
CNG stands from compressed natural gas which is stored at very high pressure.
Substances that can burn easily are called
The substances that can burn easily are called as combustible substance such as coal , petrol, wood etc.
Non-metal which is good conductor of electricity is
Non-metals are generally bad conductor of electricity but graphite is good conductor of electricity.