Unicus Science Olympiad (USO) Class 9 Sample Paper

Sample Paper
(2020-21)

Class 9
Unicus Science Olympiad

Section – Class* Total Marks per Total
*Syllabus covered Questions Questions Questions
Classic Section – Class 8 28 1 28
Classic Section – Class 7 12 1 12
Scholar Section – Class 8 7 2 14
Scholar Section – Class 7 3 2 6
Grand Total 50 60

1. Identify the crops given in the box below and select the option that correctly categorizes
them:
Sugarcane, Cotton, Mustard, Maize, Sorghum, Linseed, Barley, Groundnut, Wheat,
Chickpea, Soybean

a) Rabi - Sugarcane, Linseed, Groundnut, Wheat, Soybean.
Kharif - Mustard, Cotton, Barley, Sorghum, Chickpea, Maize

b) Rabi - Barley, Linseed, Cotton, Maize, Wheat
Kharif - Mustard, Groundnut, Soybean, Sugarcane, Chickpea, Sorghum

c) Rabi - Wheat, Barley, Sugarcane, Sorghum, Chickpea
Kharif - Linseed, Soybean, Mustard, Cotton, Groundnut, Maize

d) Rabi - Linseed, Barley, Wheat, Chickpea, Mustard
Kharif - Cotton, Maize, Sorghum, Sugarcane, Groundnut, Soybean

Correct Answer: d 1 Mark

2. A machine gun of mass 10 kg fires 50 g bullets with speed of 600 m/s at the rate of 20
bullets per second. To hold the gun steady in its position how much force is necessary?

a) 300 N b) 200 N
c) 100 N d) 600 N

Correct Answer: d 1 Mark

3. Fill in the blank:
The formula of the phosphate of an element R is RPO 4, then the formulae of its
hydroxide and sulphide, respectively, are ____________ and ________________.

a) R(OH)3 and R3S2 b) R(OH)2 and R2S3
c) R(OH)2 and R3S2 d) R(OH)3 and R2S3
Correct Answer: d 1 Mark

2

4.

Consider the following statements regarding the organisms shown above and answer
the question that follows:

1. Organism A prepare their own food by photosynthesis.
2. Organism B depend upon other organisms to obtain food.
3. Organism B reproduces by binary fission.
4. Organism A reproduces by both sexual and asexual methods.
Which of the above statements is/are correct?
a) Only 1 b) Only 2
c) Only 4 d) 1, 2, 3 and 4
Correct Answer: d 1 Mark

5. Akash placed zinc pieces in each of the four test tubes containing different salt
solutions as shown below:

In which of the above cases, a colour change will be observed in the solutions?
a) I and II b) II and III
c) III and IV d) I, II and IV

Correct Answer: c 1 Mark

3

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

Statement 1: Mercury is very hot during the day and becomes freezing cold during
night.
Statement 2: Mercury is very close to sun. It does not have any atmosphere.

a) Statement 1 is correct but statement 2 is incorrect.
b) Statement 2 is correct but statement 1 is incorrect.
c) Both the statements are correct and statement 2 is the correct explanation of
statement.
d) Both the statements are correct but statement 2 is not the correct explanation of
statement.

Correct Answer: c 1 Mark

7. Which of the following is/are the adaptation(s) shown by penguins to survive in extreme
cold condition?
1. They live in groups and get huddled together to keep themselves warm.
2. They possess short, thick and waterproof feathers.
3. They have streamlined body, paddle-like webbed feet and wings shaped like flippers.
4. They have white, dense and fine fur that traps air to keep them warm.

a) Only 1 b) Only 2
c) Both 2 and 4 d) 1, 2 and 3
Correct Answer: d 1 Mark

8. Change A: Anaerobic bacteria digest animal waste and produce biogas.
Change B: The biogas is then burnt as fuel.

The following statements pertain to the above changes. Choose the correct one:

a) A is a chemical change whereas B is a physical change.
b) A is a physical change whereas B is a chemical change.
c) Both A and B are physical changes.
d) Both A and B are chemical changes.

Correct Answer: d 1 Mark

4

9. Select the correct option and complete the following table:

Sample Colour of methyl Colour of Nature
orange phenolphthalein
Sodium hydroxide Yellow Pink Basic
Dilute hydrochloric A Colourless B
acid
Vinegar Red C Acidic
Limewater D E Basic

a) A – Red, B – Acidic, C – Colourless, D – Red, E – Colourless
b) A –Yellow, B – Basic, C – Colourless, D – Red, E – Colourless
c) A – Red, B – Acidic, C – Pink, D – Red, E – Pink
d) A – Yellow, B – Basic, C – Colourless, D – Yellow, E – Colourless

Correct Answer: a 2 Marks

10. Two plane mirrors PQ and RS are placed at right angles to one another. A ray of light
AB hits PQ at B making an angle of 45o as shown in the diagram. At what angle, this
ray will be reflected from mirror QS?

a) 20o b) 45o
c) 65o d) 55o

Correct Answer: b 2 Marks

5