Class 11th | Maharashtra State Board| Chapter 1 | Some basic Concept of Chemistry | IMP Questions |

Class 11 || Basic of Coordinate Geometry || IIT-JEE || Board Exams

Give reason for the following features of transition metal chemistry: (i). The lowerst oxide of a transition metal (say, chromium, atomic number 24) is basic whereas the highest oxide is usually acidic. (ii) . Transitio metals sometimes oxhibit very low oxidation states such as +1 and 0.

A high tension wire is at a high potential with respect to a wire which is well grounded called Earth wire. You must have seen such wires stretched parallel to roads. There is a high tension wire between two points A and B. 1 km apart. The distance between HT wire and earth wire is 1 m. The resisatnce of the HT (and also the earth wire) is 1 Omega//m . This wire is at a potential of 11 KV at point A w.r.t. to earth wire. and its is carrying 1 A current which returns back to the generator by through the earth wire. This wire is quite a thick wire. There is a sign board at a pole over which this wire is stretched reading DANGER, 11 KV. You might thick what would happen if one touched this wire. Will one feel a shock or not. Well ! it depends on whether the current through our body exceeds a particular valuem which we may call CRITICAL CURRENT. If the above question find the current through the bird.