09-09-2018, 12:34 PM
Previous year question paper and answer key of National Science Olympiad Exam 2012 for class 12 (Plus Two)
Some sample questions from the paper
1. Which of the following is incorrect about phylum chordata?
(A) Phylum chordata has fundamental features as the presence of a notochord, a o sa hollow nerve cord, and paired pharyngeal gill slits.Â
(B) In subphylum urochorda, notochord extends from head to tail regton and persistant throughout their life while in subphylum cephalochordata. notochord is present only in larval level
©In subphylum vertebrata, embryonic notochord is replaced by a cartilaginous or bony
vertebral column in the adult.
(D) None of these.
2. A real image is formed by a convex lens for an object placed at distance d from the lens. A concave lens is put in contact with the convex lens and again a real image is formed when the object is placed at same distance d from the lens system. This image will (as compared to the earlier image)
(A) Shift towards the lens system   (B) Shift away from the lens system
© Remain in its original position   (D) None of these.
3. A convex lens forms an image of an object on a screen. The height of the image is 9 cm. The lens is now displaced until an image is again obtained on the screen. The height of this image is 4 cm. The distance between the object and the screen is 90 cm. Which among the following statements is not correct?
(A) The distance between the two positions of the lens is 30 cm.
(B) The distance of the object from the lens in its first position is 36 cm
©Â Â Â The height of the object is 6 cm
(D) The focal length of the lens is 21.6 cm
4. How many days will there he from 26" January 2004. to 15th May. 2004 (both days included) ?
(A) 110
(B) 111
©Â 112
(D) 113
For complete question papers and answer keys download the pdf files available below
Some sample questions from the paper
1. Which of the following is incorrect about phylum chordata?
(A) Phylum chordata has fundamental features as the presence of a notochord, a o sa hollow nerve cord, and paired pharyngeal gill slits.Â
(B) In subphylum urochorda, notochord extends from head to tail regton and persistant throughout their life while in subphylum cephalochordata. notochord is present only in larval level
©In subphylum vertebrata, embryonic notochord is replaced by a cartilaginous or bony
vertebral column in the adult.
(D) None of these.
2. A real image is formed by a convex lens for an object placed at distance d from the lens. A concave lens is put in contact with the convex lens and again a real image is formed when the object is placed at same distance d from the lens system. This image will (as compared to the earlier image)
(A) Shift towards the lens system   (B) Shift away from the lens system
© Remain in its original position   (D) None of these.
3. A convex lens forms an image of an object on a screen. The height of the image is 9 cm. The lens is now displaced until an image is again obtained on the screen. The height of this image is 4 cm. The distance between the object and the screen is 90 cm. Which among the following statements is not correct?
(A) The distance between the two positions of the lens is 30 cm.
(B) The distance of the object from the lens in its first position is 36 cm
©Â Â Â The height of the object is 6 cm
(D) The focal length of the lens is 21.6 cm
4. How many days will there he from 26" January 2004. to 15th May. 2004 (both days included) ?
(A) 110
(B) 111
©Â 112
(D) 113
For complete question papers and answer keys download the pdf files available below