Central Institute of Higher Tibetan Studies 2009 CBSE CLASS X - Question Paper

(d) Write the names of the compounds.
16. In a household electric circuit various appliances are connected in parallel to 1 a different.
provide 2 reasons.
An electrician puts a fuse of rating 5A in that part of domestic electrical circuit in which an
electrical heater of rating 1.5kW, 220V is operating. What is likely to happen in this case
and why? What change, if any, needs to be made?
OR
You are provided subsequent current-time graphs from 2 various sources:
(i) Name the kind of current in 2 cases.
(ii) Identify any 1 source for every kind of these currents.
(iii) What is the frequency of current in case II in India?
(iv) Use above graphs to write 2 difference ranging from the current in 2 cases.
part B
17. After a vigorous exercise, you may experience cramps in your leg muscles. Why does this
happen? 1
18. Which organ secretes a hormone when the blood sugar rises. Name a digestive enzyme
released by this organ. 1
19. Name 2 gases, other than carbon-di-oxide, that are provided out during burning of fossil
fuel and contribute towards acid rain formation. 1
20. Out of 2 solar cookers, 1 was covered by a plane glass slab and the other was left
open. Which of the 2 solar cookers will be more efficient and why? 2
310
21. In the flow chart provided below, fill in the blank spaces with the type of energy available. 2
22. By comparing the likeness of nucleotide sequences in DNA of various types of organisms,
evolutionary relationships can be established. organize the subsequent according to their
evolutionary closeness. (You may use your knowledge of classification also). Whose DNA
among these do you think is most similar to that of humans? 2
cockroach, mango tree, gorilla, fish
23. Study carefully the food chains provided below:-
Food chain I : grass - grasshopper - frog
Food chain II : wheat - rat - snake - hawk
To which of the 2 consumers, frog or hawk will more energy (percent)
be available and why? 2
24. What do the subsequent transport?
(i) xylem (ii) phloem (iii) pulmonary vein (iv) Vena Cava
25. provide 1 term caption for
the 2 pictures provided here.
describe the term and provide
its signifance in evolution 3
26. Why are environmentalists

Earning:   Approval pending.