Balance the following reaction
1. h2so4+s=so2+h2o

Identify the situation for which speed and average speed of the objects are equal.(i) freely falling ball (ii) second or minute needle of a clock (iii) motion of a ball on inclined plane (iv) train going from delhi to mumbai (v) when object moves with uniform speed

Name one fibre each obtained from wood and petroleum

How many covalent bonds are formed by how many electrons in oxygen molecules ?