CBSE Class 9 Science NSO Olympiad MCQs with Answers Set B

Logical Reasoning

Question. Find the missing term in the given series.
165, 195, 255, 285, 345, ?
A. 375
B. 420
C. 435
D. 390
Answer : A

Question. Find the water image of the given word.

Answer : A

Question. In the given number series, how many 4s are there which are immediately preceded by a pair of numbers whose product is more than the product of the pair of numbers immediately following 4?
7 3 4 2 3 4 3 2 2 4 4 6 8 9 4 7 3 4 2 4 6 4 5 4 3 2 4 4 5 2
A. 4
B. 5
C. 6
D. 2
Answer : B

Question. In an organisation of pollution control board, engineers are represented by a circle, legal experts by a square, environmentalists by a triangle and doctors by rectangle. Which number shows Environmentalists with engineering background who are not doctors?

A. 2
B. 3
C. 4
D. 7
Answer : B

Question. If WORK is coded as 4 – 12 – 9 – 16, then how will you code WOMAN?
A. 4 – 12 – 14 – 26 – 13
B. 4 – 12 – 13 – 26 – 14
C. 4 – 12 – 11 – 26 – 13
D. 23 – 15 – 13 – 1 – 14
Answer : A

Question. A set of figures carrying certain characters, is given.
Assuming that the characters in each figure follow he same pattern, find the missing character.

A. 210
B. 450
C. 70
D. 150
Answer : C

Question. Read the following information and answer the question that follows :
I. Six men B, D, C, M, J and K are split in two groups of three each and are made to stand in two rows, such that a man in one row is exactly facing a man in the other row.
II. M is not at the ends of any row and is to the right of J, who is facing C. K is to the left of D, who is facing M.
Who is to the immediate left of B?
A. M
B. D
C. J
D. Data inadequate
Answer : A

Question. A sheet of paper is folded in a particular manner as shown in X, Y and Z and a punch is made. Select a figure amongst the options, that would most closely resemble the unfolded form of paper.

Answer : D

Question. Select a figure from the options which will continue the same series as established by the five problem figures.

Answer : B

Question. There are 30 days in a month and 1st day of this month is Monday. If each even date on Monday and each Sunday is a holiday, then how many working days are there in the month?
A. 23
B. 22
C. 24
D. 21
Answer : C

Question. Select a figure from the options, which when placed in the blank space of figure (X) would complete the pattern.

Answer : D

Question. Study the information given below and answer the following question.
Himani, Saurabh and Ritesh are children of Mr. and Mrs. Aggarwal. Riya, Rajat and Samay are children of Mr. and Mrs. Bansal. Samay and Himani are married and Ashu and Jay are their children. Gauri and Raj are children of Mr. and Mrs. Jain. Gauri is married to Ritesh and has three children named Rita, Sonu and Raju.
How is Raj related to Rita?
A. Brother
B. Cousin
C. Grand father
D. Maternal uncle
Answer : D

Question. How many triangles are there in the given figure?

A. 40
B. 42
C. 45
D. None of these
Answer : D

Question. Which of the following figures will complete the given figure matrix?

Answer : B

Question. Abhijit's house is to the right of Baljit's house at a distance of 20 metres in the row facing North.
Sanjay's house is in the North-East direction from Baljit's house at a distance of 25 m. Abhijit's house is in which direction with respect to Sanjay's house?
A. North
B. East
C. West
D. Data inadequat 
Answer : D

Science

Question. A metal sphere of mass 12 kg has the same diameter as another sphere of mass 4 kg. Both spheres are dropped simultaneously from a tower. When they are 8 m above the ground, they have the same _____. (Neglect air resistance.)
A. Kinetic energy
B. Potential energy
C. Momentum
D. Acceleration
Answer : D

Question. A sealed container is filled with air. The uniform cross-sectional area of the container is shown in the given figure.

Which of the following statements is true?
A. Air pressure acting on surface A is higher than the air pressure acting on surface B.
B. Air pressure acting on surface B is higher than the air pressure acting on surface A.
C. The air particles apply a higher force on surface A than surface B.
D. The air particles apply a higher force on surface B than surface A.
Answer : C

Question. Read the given statements and select the correct option.
Statement 1 : The value of dynamic friction is less than the limiting friction.
Statement 2 : Once the motion has started, the inertia of rest has been overcome.
A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C. Statement 1 is true and statement 2 is false.
D. Both statements 1 and 2 are false.
Answer : A

Question. A stone is thrown upwards from a point at the edge of a cliff.
After the stone has reached its maximum height, it falls past the cliff edge to the beach, as shown in the given figure.

The initial vertical component of the velocity of the stone is 10 m s–1. The time taken between the stone passing the edge of the cliff on its way down and hitting the beach is 1.2 s. Ignoring air resistance, find the height of the cliff.
A. 5 m
B. 7 m
C. 12 m
D. 19 m
Answer : D

Question. Ultrasound is emitted from a ship directly downwards into water. The diagram below shows the time duration for ultrasound to return to the receiver on the ship as the ship travels from point X to point Y along the surface of the water. At which position is the water deepest?

A. S
B. R
C. Q
D. P
Answer : C

Question. When a body floats in water (1/3)^rd of its volume remains outside, whereas (3/4)^th of its volume remains outside when it floats in a liquid. The density of the liquid in g cm^–3 is ______.
A. 4/3
B. 5/3
C. 6/3
D. 8/3
Answer : D

Question. The acceleration due to gravity of the Earth and the Moon are 10 m s^–2 and 1.7 m s^–2 respectively. When an astronaut jumps on the Moon, then ______.
A. He will take a longer time to reach the top and a longer time to come down as compared to jumping on the Earth
B. He will take a longer time to reach the top and a shorter time to come down as compared to jumping on the Earth
C. He will take a shorter time to reach the top and a longer time to come down as compared to jumping on the Earth
D. He will take a shorter time to reach the top and a shorter time to come down as compared to jumping on the Earth
Answer : A

Question. Which of the following statements is true?
A. The image of a virtual object is called a virtual image.
B. If the reflected rays are converging, we get a real image.
C. If the incident rays are converging, we get a real object.
D. If the image is virtual, the corresponding object is called a virtual object.
Answer : B

Question. A box originally at rest, slides down from point S to point T as shown. Assuming that the slope is frictionless, at which point does the box have about 25% of its maximum kinetic energy?

A. 4
B. 2
C. 3
D. 1
Answer : D

Question. A body thrown vertically up with a velocity u reaches the maximum height h after T second. Which of the following statements is correct?
A. At a height h/2 from the ground its velocity is u/2.
B. At a time T its velocity is u.
C. At a time 2T its velocity is –u.
D. At a time 2T its velocity is – 6u.
Answer : C

Question. The freezing and boiling points of a substance ‘P’ are –220°C and –185°C respectively. At which of the following range of temperatures will ‘P’ exist as a liquid?
A. Between –175°C and –210°C
B. Between –190°C and –225°C
C. Between –200°C and –160°C
D. Between –195°C and –215°C
Answer : D

Question. Observe the following diagrams carefully.

If reaction occurs only in beakers I, III and VI, then which of the following statements is correct?
A. S is less reactive than P but more reactive than T.
B. R and S are more reactive than Q.
C. T and R are less reactive than K.
D. Q is more reactive than R but less reactive than P.
Answer : D

Question. Some statements about the Rutherford’s a-particle scattering experiment are given :
I. As most of the a-particles passed through the gold foil without getting deflected, the positive charge of the atom occupies the entire space.
II. As very few particles were deflected from their path, very little space inside the atom is empty.
III. As a very small fraction of a-particles were deflected by 180°, all the positive charge and mass of the gold atom were concentrated in a very small volume within the atom.
Select the correct statement(s).
A. I and II
B. I and III
C. II and III
D. III only
Answer : D

Question. An ionic compound of element M and chlorine has the formula MCl3. The molecular mass of MCl3 is 118.5. What is the molecular mass of the oxide of element M? (Given : atomic masses of O = 16 u and Cl = 35.5 u)
A. 28
B. 44
C. 72
D. 99
Answer : C

Question. Read the following statements carefully and identify X, Y and Z.
X : Hard as stones, used to cook food and to produce electricity in thermal power plants
Y : A petroleum product, used in place of coal tar for metalling the roads
Z : A pure form of carbon, used in the manufacture of steel and in the extraction of many metals
       X                   Y               Z
A. Coal            Bitumen       Coke
B. Coal tar       Coal             Paraffin wax
C. Coal tar       Diesel          Coke
D. Coke           Bitumen       Coal
Answer : A

Question. Mr. Verma while watching TV suddenly came across an accident as shown below.
In the above situation, what should Mr. Verma do?

A. He should pour water on the fire.
B. He should use oil to cut off the supply of air.
C. He should use CO₂ extinguisher on fire.
D. He should use LPG to control fire.
Answer : C

Question. Use of drugs like ephedrine and insulin by athletes is banned.
Rakesh, Amit, Deepak and Tarun were asked by a trainer to give their urine samples for the tests.
Chromatogram of their urine samples and drugs is shown below

Study the given chromatogram carefully and choose the incorrect statement among the following.
A. Deepak used both the drugs.
B. Rakesh and Deepak used insulin.
C. Rakesh used ephedrine.
D. Amit and Tarun did not use any of the given drugs. 
Answer : B

Question. Match column-I with column-II and choose the correct option using the codes given below.
Column-I                Column-II
(a) Terylene            (i) Rayon
(b) Bakelite            (ii) Thermoplastic
(c) PVC                 (iii) Polyester
(d) Artificial silk     (iv) Thermosetting
A. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
B. (a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
C. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
D. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
Answer : A

Question. Maximum number of molecules are present in ____.
A. 4.9 × 10^–3 mg of H₂SO₄
B. 4 × 10²³ molecules of SO₂
C. 10 g of N₂
D. 1.5 moles of NH₃
Answer : D

Question. The diagram shows five different structures that can be observed in cells.

Which structures would be present in large quantities in lipid synthesizing cells?
A. 1, 2, 4 and 5
B. 1, 3 and 4
C. 2, 3 and 5
D. 3, 4 and 5
Answer : C

Question. Raman set up an experiment as shown here and kept it at 30° C.

After four hours, he wrote down his observations as follows :
(i) The water in the beaker contained reducing sugars.
(ii) The reducing sugars passed into the beaker by diffusion.
(iii) The water in the beaker contained no starch.
(iv) The partially permeable membrane of visking tube prevented passage of starch into the beaker.
(v) Reducing sugars were formed in the visking tube.
Which of these observations is/are incorrect?
A. (iv) and (v)
B. (iii) only
C. (v) only
D. None of these
Answer : D

Question. Select the correct option regarding the given organisms.

A. Organisms (i), (ii) and (v) show tissue level of body organisation.
B. Organisms (i), (iv) and (v) are triploblastic animals.
C. Organisms (iii), (iv) and (v) all are eucoelomates.
D. Organisms (i), (iii), (iv) and (v) possess notochord in some stage of their life .
Answer : C

Question. Which of these epithelia is chiefly involved in function like diffusion and thereby is found in the wall of blood vessels and air sacs of the lungs?

Answer : D

Question. The diagram given below shows a river and its surrounding area.
Which of these statements holds true regarding the given diagram?

A. Site X has the highest content of dissolved oxygen while site Y has the lowest content of dissolved oxygen.
B. There is a high concentration of nitrogen compounds at site Z.
C. There are very few fishes found at site Z.
D. All of these
Answer : D

Question. Match column-I with column-II and select the correct option from the codes given below.
Column-I                      Column-II
a. Bottom feeder          (i) Surti
b. Cow breed               (ii) Tharparkar
c. Buffalo breed           (iii) Common carp
d. Surface feeder        (iv) Murrah
                                   (v) Mrigal
                                   (vi) Red sindhi
                                   (vii) Catla

Answer : D

Question. In an ecosystem, four major interdependent components were in the given proportions.

If male cats are removed from the given ecosystem, then which of these figures would show the new composition of the same ecosystem after a gap of 3 years?

Answer : A

Question. Identify the given organisms shown in the figure.

Which of the following statements is/are correct about X and Y?
(i) X is Anopheles while Y is Culex.
(ii) X spreads filariasis while Y spreads malaria.
(iii) The female Y is the vector of malaria.
(iv) The male Y is the vector of filariasis.
(v) X is host for a protozoan and Y is a host for a nematode.
A. (ii) and (iii)
B. (ii) and (v)
C. (ii) only
D. (i), (iii) and (iv)
Answer : A

Question. Mohit was asked to draw a diagram of sclerenchyma as seen in longitudinal section and label it. His figure is as shown. Find out the mistake he has made in the diagram.

A. The pit pair is bordered not simple.
B. The cell walls are not lignified in sclerenchyma.
C. The nucleus and cytoplasm are not shown.
D. It is a transverse section and not the longitudinal section.
Answer : D

Question. Refer to the given figure and identify the labelled connective tissues X and Y.

A. X - Cartilage; Y - Tendon
B. X - Tendon; Y - Ligament
C. X - Ligament ; Y - Tendon
D. X - Ligament; Y - Cartilage
Answer : B

Question. Read the following statements regarding female reproductive system and select the correct option.
(i) If the ovum released from the ovaries is not fertilized, then it is shed alongwith blood during menstruation.
(ii) Menopause occurs in the females at an age of 45–50 years.
(iii) Vagina of female reproductive system is primary sex organ.
(iv) Development of breasts in females is the accessory sex character.
A. Statements (i), (ii) and (iii) are true; while statement (iv) is false.
B. Statements (i), (ii) and (iv) are true; while statement (iii) is false.
C. Statements (ii), (iii) and (iv) are true; while statement (i) is false.
D. Statements (i) and (ii) are true; while statements (iii) and (iv) are false.
Answer : B

Achievers Section

Question. An object of mass 20 kg moves along a straight line on a smooth horizontal surface. A force F acts on the object in its direction of motion. A graph of force against time is shown here. What is the velocity of the object at t = 6 s if its velocity at t = 4 s is 4 m s^–1?

A. 3.5 m s^–1
B. 4.5 m s^–1
C. 5.3 m s^–1
D. 6.2 m s^–1
Answer : B

Question. Fill in the blanks:
The (i) of a sound is determined by its (ii) . The (iii) of the sound wave depends upon the force with which an object is made to vibrate. A sound of (iv) frequency is called a (v) .
          (i)                 (ii)                 (iii)               (iv)          (v)
A. Amplitude    Loudness      Loudness       Double     Note
B. Loudness     Amplitude     Amplitude      Single       Tone
C. Loudness     Amplitude     Amplitude      Double      Tone
D. Amplitude    Loudness      Loudness      Single       Note
Answer : B

Question. Four strips of fresh potato P, Q, R and S were immersed in solutions of different concentrations.
Osmosis occurred according to the concentration difference between cell sap and ambient solution.
A graph was plotted between initial length of strips and the change in length after osmosis.

Which of these strips was placed in the most diluted solution?
A. S
B. Q
C. R
D. P
Answer : C

Question. The solubility of two substances, X and Y at 35°C and 75°C is given in the table.

If the temperature of solutions M and N is dropped to 35°C, then amount of X and Y crystallized out will be ______.
A. 40 g, 30 g
B. 25 g, 80 g
C. 40 g, 0 g
D. 80 g, 55 g
Answer : C

Question. A comparison between two cropping patterns X and Y is given below. What are X and Y?

A. X - Mixed cropping; Y - Inter-cropping
B. X - Inter-cropping; Y - Crop rotation
C. X - Mixed cropping; Y - Crop rotation
D. X - Inter-cropping; Y - Mixed cropping
Answer : A