Which zone of a flame does a goldsmith use for melting gold and silver and why ?

Why do gold and silver do not corrode ?

Which of the following is used for dissolution of gold ?

During extraction of metals, electrolytic refining is used to obtain pure metals. a. Which material used as cathode and anode for refining of silver metal by this process? b. Suggest a suitable electrolyte. c. In this electrolytic cell where do we get pure silver after electricity is passed?

Which material is used for the meter bridge wire and why ?

Which method is commonly used for improving cattle breeds and why?

A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house. Which method did you use for finding the mean, and why?

Which among the following zone of flame is yellow in colour ?