Class 10 Science CBSE Board Paper Solutions 2015 Delhi Set-2
Q. 1. Write the name and formula of the 2nd member of homologous series having general formula CnH2n Ans: CnH2n+2 is the general formula for the alkane series. So, the second member of the alkane family is ethane Q.2. what is the magnification of the images formed by plane mirrors and why? Ans: The magnification of the image formed by a plane mirror is 1. This is because the size of the image formed is equal to the height of the object Q.3. What is meant by power of a lens? Ans: The power of a lens the ability of the lens to converge or diverge an incident beam focused on it. P = 1/f Q.4. Write two differences between binary fission and multiple fission in a tabular form. Ans: Binary Fission Only two daughter cells are produced. Nuclear division is immediately followed by cytoplasmic division. Multiple Fission More than two daughter cells are produced. Nuclear division is not immediately followed Q.5. (a) Why do we need to manage our resources carefull...