Unicus Science Olympiad (USO) Class 11 Sample Paper

Sample Paper
(2020-21)

Class 11
Unicus Science Olympiad

Section – Class* Total Marks per Total
*Syllabus covered Questions Questions Questions
Classic Section – Class 10 28 1 28
Classic Section – Class 9 12 1 12
Scholar Section – Class 10 7 2 14
Scholar Section – Class 9 3 2 6
Grand Total 50 60

1. The weight of a person on the Moon is about 1/6 times that on the Earth. He can lift a
mass of 23 kg on the Earth. What will be the maximum mass, which can be lifted by the
same force applied by the person on the Moon?

a) 136 kg b) 276 kg
c) 138 kg d) 248 kg

Correct Answer: c 1 Mark

2. Three elements X, Y, Z form a Döbereiner triad. The difference in atomic weights
between elements Y, Z is 45. If atomic weight of X is 35, find the atomic weight of
elements X, Y and Z:

a) X- 35, Y-80, Z-125 b) X- 25, Y-70, Z-115
c) X- 35, Y-40, Z-125 d) X- 35, Y-80, Z-215

3. An object is placed in front of a concave and plane mirror as shown in the figure given
below. If the focal length of the concave mirror is 25 cm and the virtual image coincide
each other, determine the value of x:

a) 11.25 cm b) 22.5 cm
c) 35 cm d) 12.5 cm

4. Usually, chrysanthemum plants are found to propagate naturally and found spreading in
the entire area.

1. Which method of propagation does it depict?
2. Can they be propagated by any other propagation? If yes, identify that method:

a) 1. Root suckers b) 1. Cutting
2. Yes, cutting 2. No
c) 1. Cutting d) 1. Root suckers
2. Yes, layering 2. No

2

5. What is the correct increasing order of oxidation state of nitrogen in following
compounds?
NH3, N2, NH2OH, NO2

a) NH3 < NO2 < N2 < NH2OH b) NO2 < NH3 < NH2OH < NH3
c) NH3 < NH2OH < NO2 < N2 d) NH3 < NH2OH < N2 < NO2

Correct Answer: d 1 Mark

6. Consider the following statements and choose the correct option:

1. During inhalation, the muscles of the ribs and the diaphragm contract.
2. The space in the thoracic cavity increases during the exhalation process.
3. In systole, phase, the ventricles expand and the inflow of blood take place from heart
to arteries.
4. Veins carry blood from heart to different parts of the body.

a) Only 1 is correct b) Only 2 is correct
c) Both 2 and 3 are correct d) 2, 3 and 4 are correct

7. Refer to the given structure of a neuron. Select the correct option:

a) T carries impulses from the cell body to other neurons.
b) P receive impulses.
c) R contains the major concentration of the cytoplasm and the central nucleus of the
neuron.
d) All of the above statements are correct

Correct Answer: d 1 Mark

3

8. Ramesh added a dilute ferrous sulphate solution gradually to the beaker containing
acidified permanganate solution. He noticed that the light purple colour of the solution
fades and finally disappears.

Which of the following is the correct explanation for the observation?

a) KMnO4 is an unstable compound and decomposes in presence of FeSO 4 to a
colourless compound.
b) KMnO4 is an oxidising agent, it oxidises FeSO4.
c) FeSO4 acts as an oxidising agent and oxidises KMnO 4.
d) The colour disappears due to dilution; no reaction is involved.

Correct Answer: b 1 Mark

9. Consider the following circuit. At which point is the value of current smallest?

a) P and Q b) Q only
c) P and R d) S only

Correct Answer: b 2 Marks

10. Match the following:

Column I (Sample) Column II (Number of atoms)
1. 1 g of CaCO3 P. 7.82 x 1024
2. 52 u of He Q. 1.5 x 1023
3. 4.25 g of NH3 R. 3.36 x 1024
4. 1.4 moles of PCl3 S. 6.022 x 1021

a) 1-P, 2-Q, 3-S, 4-R b) 1-S, 2-P, 3-Q, 4-R
c) 1-S, 2-P, 3-R, 4-P d) 1-S, 2-Q, 3-P, 4-R

Correct Answer: b 2 Marks

4