C S DAV PUBLIC SCHOOL, MOTIHARI HOME ASSIGNMENT (SUMMER VACATION – 2015-16) Instruction – Write the answers of the following questions in a separate Note Book meant for Home Assignment. Class:- XII Chemistry Q1. Q2. Q3. Q4. Q5. What are crystalline solids? Classify the crystalline solids? What are amorphous solids? Why amorphous solids are called super cooled liquid? What do you mean by crystal lattice and unit ? Physics 1. Project on charging and discharging. 2. Circuit based assignment for verification of ohm’s law. 3. Project on color coding for carbon resistors. Maths 1. Define upper and lower triangular matrices with suitable examples. 2. Write any five properties of Determinants with suitable examples. 3. What is consistent and inconsistent system of equations? What is its condition? Explain. Biology 1. What do you mean by reproduction? Discuss asexual reproduction. 2. Draw Male and Female reproductive system in human. 3. Explain menstrual cycle. 4. What are contraceptive majors? 5. Draw T S of human ovary English Q.1 You are Avinash of F/N - 602, Park Street, Nagpur. Draft a job application to the Managing Director for the post of Management Trainee. Q.2 You are the secretary of Vidya Niketan, Patna. Draft an advertisement for a few senior teachers of all subjects from senior secondary classes Q.3 Draft a complaint letter to the chairman of your municipality regarding the garbage and stagnant water in your locality. Computer Q1 . What is the use of Networking in computer ? Q2 . Why we use Programming Language? Q 3 . Draw a flowchart of working of ATM machine ?