What inspired N. Bartlett,for carrying out the reaction between Xe and `PtF_6`?

What inspried N. Bartlett for carrying out reaction between Xe and PtF_6 ? Write the reaction also.

What is synovial joint?With the help of one example for each ,point out the differences between a ball and socket joint,and a pivot joint.

Which of the following metal can be used for carrying out Wurtz-Fittig reaction ?

What is the difference between rate of a reaction and rate constant?