C X - Full Test 3 Science QP
C X - Full Test 3 Science QP
C X - Full Test 3 Science QP
CBSE TERM – II
(FULL TEST – 3)
(SCIENCE)
General Instructions:
2. The question paper has three sections and 15 questions. All questions are compulsory.
3. Section–A has 7 questions of 2 marks each; Section–B has 6 questions of 3 marks each; and
4. Internal choices have been provided in some questions. A student has to attempt only one of the
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SECTION – A
OR
3. Define unisexual flower and given one example of unisexual flowers? [2]
OR
6. (i) The allotropic form of carbon which is a good conductor is: [1]
(ii) The bond between carbon and hydrogen in any hydrocarbon is: [1]
SECTION – B
10. Draw well labeled diagram of female reproductive system and label the following parts. [3]
(a) Fallopian tube
(b) Ovary
(c) Uterus
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13. Define valency and find out the valencies of first twenty elements. [3]
OR
SECTION – C
14. (a) Explain why there are two separate circuits one for high power rating appliances and other
for low power rating appliances.
(b) A domestic circuit has 5A fuse. How many bulbs of rating 100W, 220V can be safely used in
this circuit? Justify your answer. [4]
OR
(a) What is meant by a resistance? Name and define its SI unit. In a conductor electrons are
flowing from B to A. What is the direction of conventional current? Give justification for your
answer.
(b) A steady current of 1 ampere flows through a conductor. Calculate the number of electrons
that flows through any section of the conductor in 2 second. (Charge on electron 1.6 10-19
coulomb).
15. Read the following and answer any four questions from (i) to (v)
In any given ecosystem, all living organisms are linked in a systematic chain with respect to their
mode of manufacturing food/feeding habits. The sequential interlinking of organisms involving
transfer of food energy from producers through a series of organisms with repeated eating and
being eaten is called the food chain. A food chain may have 3 – 4 trophic levels.
OR
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(A) Food chain may terminate at level of herbivores.
(B) Food chain is always straight.
(C) Food chain may have 3 – 5 trophic levels.
(D) In a food chain, 80 – 90% of potential energy is lost as heat, at each transfer.
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