HI MY NAME IS SUDIPTA PAUL AND TODAY I WILL GIVE QUESTION OF CHEMISTRY CLASS VI. 1)WHAT DO YOU UNDERSTAND FROM THE TERM CHEMISTRY?? 2)FOR WHAT THE TEST TUBE IS USE?? 3) TWO MATERIALS USE IN ELECTRONIC INDUSTRY FOR THE MANUFACTURE OF ELECTRICAL CIRCUITS?? 4)NAME ANY THREE SCIENTISTS WHO CONTRIBUTED IN THE FIELD OF CHEMISTRY?? 4) WHAT ARE PETROCHEMICALS??5)WHY IS THE FIRE GAUZE PLACED UNDER GLASS APPARATUS.
Answers
Answer:
1. Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.
2.Test tubes are used to hold and test various reactions on a small scale.
They can be used to test multiple small batches of different experiments, saving you time and space.
3.two material used in electronic industry for manufacture of electrical circuits are -
i ) Copper is often used for its excellent conductivity and malleability (the ability to be shaped and mashed).
ii )Silicon — considered a metalloid, or semimetal — is used in microchips and semiconductors.
4.Those chemicals which are obtained from petroleum and natural gas are called petrochemicals. For Ex:Methyl alcohol,ethyl .
5.Wire gauze is an important piece of supporting equipment in a laboratory as glassware cannot be heated directly with the flame of a Bunsen burner, and requires the use of a wire gauze to diffuse the heat, helping to protect the glassware. Glassware has to be flat-bottomed to stay on the wire gauze.