09-09-2018, 11:59 AM
Solved previous year question paper of NSO- National Science Olympiad held in 2012. of Standard 11 (Plus One).
Some sample questions from the paper
1.   Which one of the following statements is incorrect?
(A)Â Â Â Hydrophilic part of soap dissolves in water.
(B)Â Â Â The soap align along the surface of water with hydrocarbon tail in water.
©Â Â Â The micelles stay in solution as a colloid and will not come together.
(D)Â Â Â The molecules of soap are sodium or potassium salts of long-chain carboxylic acids.
2.   In Haber’s process, 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of the gaseous mixture under the aforesaid condition in the end?
(A)   20   litres ammonia,   25   litres nitrogen,   15   litres   hydrogen
(B)   20   litres ammonia,   20   litres nitrogen,   20   litres   hydrogen
©Â   10   litres ammonia,   25   litres nitrogen,   15   litres   hydrogen
(D)   20   litres ammonia,   10   litres nitrogen,   30   litres   hydrogen
3. Reaching the place of meeting 30 minutes before 10:30 hrs, Sahil found himself 20 minutes earlier than the man who came 30 minutes late. What was time of the meeting?
(A) 10 : 20 hrs (B) 10 : 05 hrs © 10 : 10 hrs (D) None of these
4. The town of Paranda is located on Green Lake. The town of Akram is west of Paranda, Tokhada is east of Akram but west of Paranda. Kakran is east of Bopri but west o Tokhada and Akram. If they are all in the same district, which town is the farthest west?
(A) Paranda   (B) Kakran   © Akram   (D) Bopri
5. Seema has observed that whenever she is under stress, she easily falls sick. Atleast thrice she had fallen sick because of common cold or stomach infection during her stressful days. She formulated a hypothesis,’’under stress, a person is more prone to fall sickâ€.
How would she support her hypothesis?
(A)   When we are under stress   our   body secretes   thyrotropin
(B)   When we are under stress   our   body secretes   cortisol
©Â   When we are under stress   our   body secretes   aldosterone.
(D)   When we are under stress   are   body secretes   enkephalin.
For complete question paper and answer keys download the pdf files from the link below.
Some sample questions from the paper
1.   Which one of the following statements is incorrect?
(A)Â Â Â Hydrophilic part of soap dissolves in water.
(B)Â Â Â The soap align along the surface of water with hydrocarbon tail in water.
©Â Â Â The micelles stay in solution as a colloid and will not come together.
(D)Â Â Â The molecules of soap are sodium or potassium salts of long-chain carboxylic acids.
2.   In Haber’s process, 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will be the composition of the gaseous mixture under the aforesaid condition in the end?
(A)   20   litres ammonia,   25   litres nitrogen,   15   litres   hydrogen
(B)   20   litres ammonia,   20   litres nitrogen,   20   litres   hydrogen
©Â   10   litres ammonia,   25   litres nitrogen,   15   litres   hydrogen
(D)   20   litres ammonia,   10   litres nitrogen,   30   litres   hydrogen
3. Reaching the place of meeting 30 minutes before 10:30 hrs, Sahil found himself 20 minutes earlier than the man who came 30 minutes late. What was time of the meeting?
(A) 10 : 20 hrs (B) 10 : 05 hrs © 10 : 10 hrs (D) None of these
4. The town of Paranda is located on Green Lake. The town of Akram is west of Paranda, Tokhada is east of Akram but west of Paranda. Kakran is east of Bopri but west o Tokhada and Akram. If they are all in the same district, which town is the farthest west?
(A) Paranda   (B) Kakran   © Akram   (D) Bopri
5. Seema has observed that whenever she is under stress, she easily falls sick. Atleast thrice she had fallen sick because of common cold or stomach infection during her stressful days. She formulated a hypothesis,’’under stress, a person is more prone to fall sickâ€.
How would she support her hypothesis?
(A)   When we are under stress   our   body secretes   thyrotropin
(B)   When we are under stress   our   body secretes   cortisol
©Â   When we are under stress   our   body secretes   aldosterone.
(D)   When we are under stress   are   body secretes   enkephalin.
For complete question paper and answer keys download the pdf files from the link below.