SCIENCE PAPER 2009.
Time allowed: 2 & 1/2 hours; Maximum Marks: 60
|1)||The question paper comprises of two Sections A and B. You are to attempt both the sections.|
|2)||All questions are compulsory.|
|3)||There is no overall choice. However, internal choice has been provided in all the three questions of five marks category. Only one option in such questions is to be attempted.|
|4)||All questions of Section A and all questions of Section B are to be attempted separately.|
|5)||Questions 1 to 6 Section A and 17 to 19 in Section B are short questions. These questions carry one mark each.|
|6)||Questions 7 to 10 in Section A and 20 to 24 in Section B are short answer type questions and carry two marks each.|
|7)||Questions 11 to 14 in Section A and 25 to 26 in Section B are also short answer type questions and carry three marks each.|
|8)||Questions 15 and 16 in Section A and question 27 in Section B are long answer type questions and carry five marks each.|
When water is added to quick lime, heat is evolved or absorbed?
What do you observe when a burning splinter is brought near the gas jar filled with hydrogen?
Define the term metalloid.
What is the radius of curvature of a spherical mirror?
What is the most convenient way of describing a magnetic field?
What is an ohmic resistor?
Why is it necessary to balance a chemical equation?
Write the use of pH in our digestive system.
What do you mean by principal focus and focal length of a concave mirror? Draw a diagram representing them.
A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it?
Name the elements present in Group 1 of the modern periodic table.
Define the term hydrocarbons. What types of compounds are included in it?
What do you mean by resistance of a conductor? Define its unit.
(i) Draw a diagram to show, how two resistance R1 and R2 are connected in series?
(ii) In a circuit if the two resistances of 5 Ω and 10 Ω are connected in series, how does the current passing through the two resistors compare?
With the help of an activity show that reactive metals can displace less reactive metals from their compounds in their aqueous solutions.
With the help of an activity show that metals are good conductors of heat as well as have high melting points.
What is the mode of nutrition in Plasmodium?
What is the source of energy in natural ecosystem?
Where do we find cerebrospinal fluid? Give its function.
What is wind? What is the main factor responsible for its formation?
Briefly explain the mechanism of nuclear fission process.
What is the composition of nervous system in higher vertebrates?
What are analogous organs, give example?
Give four conditions necessary for Photosynthesis.
Describe the human digestive system.
Describe an experiment to prove that light is essential for photosynthesis.
Describe asexual reproduction in Amoeba.
(i) How do chlorofluorocarbons (CFC’s) enter the atmosphere and how do they affect humans?
(ii) What is incineration? How it helps in reducing the wastes?