Which of the following is fully fluorinated polymer?
1) PVC
A chemist prepares 1.00 g of pure $$_{6}^{11}{C}$$. This isotope has half-life of 21 min, decayin
A ball is thrown vertically downwards from a height of 20 m with an initial velocity u0
Witting reagent contains
1) phosphorus
2) sulphur
3)&nb