Salt, sugar, chalk and sand are all:
The gas which is used as cooling agent is:
A very light and inert gas is
A process by which new substance is formed, is called
Salt, sugar, chalk and sand are all
A molecule which breaks and gives of hydrogen and oxygen is
When iron and sulphur are mixed together at room temperature there is lack of
Due to temperature sensitivity element which is filled in thermometer, is
Heating, exposing to light or passing electricity will only let to decompose
Elements resting in same group share same
Carbon, hydrogen and oxygen combine together to make
Water is broken down into small units by passing it through
There are 30 people in a group. If all shake hands with one another , how many handshakes are possible
