CBSE Class 6 Science NSO Olympiad MCQs with Answers Set E

LOGICAL REASONING

Question. Select the odd one out.
A. 5, 10, 20, 15
B. 25, 50, 100, 75
C. 10, 20, 60, 45
D. 15, 30, 60, 45
Answer : C

Question. How many minimum number of straight lines are required to make the given figure?

A. 15
B. 16
C. 17
D. 18
Answer : D

Question. Find the missing number, if a certain rule is followed row-wise or column-wise

A. 4
B. 8
C. 12
D. 16
Answer : B

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

Answer : A

Question. Study the diagram carefully

Architects who are neither Indians nor musicians are represented by ________.
A. b
B. c
C. f
D. g
Answer : C

Question. Select a figure from the options, which will continue the same series as established by the Problem Figures

Answer : D

Question. In a certain code language, CENTRAL is written as ABCDEFG and PLANETARIUM is written as HGFCBDFEIJK. How will LANTERN be written in the same code language ?
A. GFCDFEG
B. GFCDEFG
C. GFCDBEC
D. GFCDBEB
Answer : C

Question. Five boys are standing in a row facing East. Mohit is to the left of Sameer, Tushar and Samrath. Sameer, Tushar and Samrath are to the left of Aman. Samrath is between Sameer and Tushar. If Tushar is fourth from the left, how far is Sameer from the right?
A. First
B. Second
C. Third
D. Fourth
Answer : D

Question. Select a figure from the options, which will complete the given figure matrix.

Answer : C

Question. Arrange the given words in the sequence in which they occur in the dictionary and then choose the correct sequence.
1. Protein 2. Problem
3. Proverb 4. Property
5. Project
A. 1, 2, 3, 4, 5
B. 2, 1, 4, 3, 5
C. 2, 5, 4, 1, 3
D. 3, 4, 5, 2, 1
Answer : C

SCIENCE

Question. A bar magnet gets broken into four pieces E, F, G and H.

Answer : C

Question. A 1 m long uniform beam is being balanced as shown in the given figure.

What are the forces X and Y ?
Force X        Force Y
A. 1 N           0 N
B. 2 N           1 N
C. 3 N           3 N
D. 4 N           7 N
Answer : C

Question. Which of the following statements about pinhole camera are correct ?
(i) It is a camera with a single lens.
(ii) It produces an upside down image of object.
(iii) It does not have a screen.
(iv) It works because light travels in a straight line.
(v) It forms real and colourless shadows of objects.
A. (i) and (v) only
B. (ii) and (iv) only
C. (i), (iii) and (iv) only
D. (ii), (iv) and (v) only
Answer : B

Question. Which of the following statements is incorrect about the asteroids?
A. They are planet like objects, but smaller and often irregularly shaped.
B. Majority of asteroids orbit in the asteroid belt between the orbits of Mars and Jupiter.
C. Asteroids are mainly composed of mineral and rock.
D. Vesta is the largest and most massive asteroid discovered.
Answer : D

Question. To protect the user, part(s) _______ of the plug as shown in the figure must be made of electrical insulators

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

Question. Match column-I with column-II and select the correct option

A. (i) – (c), (ii) – (b), (iii) – (d), (iv) – (a)
B. (i) – (c), (ii) – (a), (iii) – (d), (iv) – (b)
C. (i) – (d), (ii) – (a), (iii) – (b), (iv) – (c)
D. (i) – (d), (ii) – (b), (iii) – (a), (iv) – (c)
Answer : B

Question. Peehu has a card with the word MAGNET written on it. She places a plane mirror at position (1) and then at position (2) as shown in the figure and observes the images.

Answer : C

Question. In which of the following does the fulcrum not lie between the effort and the load ?

Answer : C

Question. Study the given flowchart carefully.

Which of the following correctly lists the names of planets that can be placed at P, Q, R and S in the given flowchart ?
        P               Q             R            S
A. Mars         Venus      Earth    Mercury
B. Venus       Mercury   Earth     Mars
C. Mercury    Earth       Mars     Venus
D. Mars        Earth       Venus    Mercury
Answer : D

Question. Fill in the blanks by choosing an appropriate option.
Magnetic strength of a bar magnet is (i) at its poles and (ii) at its centre. Two (iii) poles attract each other whereas two (iv) poles repel each other.
          (i)              (ii)               (iii)          (iv)
A. Maximum     Minimum       Opposite     Similar
B. Maximum     Maximum      Opposite     Similar
C. Minimum     Minimum       Similar        Opposite
D. Minimum     Maximum      Similar        Opposite
Answer : A

Question. Rashmi, a class 6 teacher listed the given materials on the board and asked students to classify them on the basis of transparency.
(I) Window glass (II) Oily paper (III) Metal sheet (IV) Thin muslin cloth (V) Concrete wall
Which of the following represents the correct classification?
A. I, IV-transparent; II-translucent; III, V-opaque
B. I, II-translucent; III-opaque; IV, V-transparent
C. I-transparent; II, IV-translucent; III, V-opaque
D. V-opaque; II, III-translucent; I, IV-transparent
Answer : C

Question. The given diagrams represent two elements :

Which of the following statements is true about X and Y?
A. Particles of element X can move freely in all directions.
B. Element Y is incompressible in nature.
C. Element X is a solid and element Y is a gas.
D. Element X is less denser than element Y.
Answer : C

Question. Substances W, X, Y and Z are obtained from different types of mixtures by using appropriate separating processes as shown in the given flowchart :

Separating processes used to obtain W, X, Y and Z respectively are
A. Winnowing, filtration, sedimentation and evaporation
B. Sedimentation, winnowing, filtration and separating funnel
C. Handpicking, sedimentation, winnowing and evaporation
D. Sieving, evaporation, filtration and separating funnel.
Answer : D

Question. Rohan, a class 6 student used lemon juice to write a secret message to his friend on a white paper. He let the paper dry completely and message disappeared (Process I). He asked his friend to gently heat the paper (taking care that it does not catch fire) to see the message (Process II).
Which of the following statements is correct regarding the types of changes taking place in processes I and II?
A. Both are physical changes.
B. Both are chemical changes.
C. Process I is a physical change and process II is a chemical change.
D. Process I is a chemical change and process II is a physical change.
Answer : C

Question. Which of the following statements are incorrect?
I. Vinegar and lemon juice form a separate layer on water.
II. Freshly cut surfaces of metals are lustrous.
III. Oxygen gas is transparent while milk is opaque.
IV. Wax when mixed with water forms a solution.
A. I and II only
B. I and IV only
C. III and IV only
D. None of these
Answer : B

Question. The given diagram describes the changes that take place between different states of matter

The processes in which heat energy is given out are
A. I and III only
B. I, IV and V only
C. I, II and IV only
D. None of these.
Answer : D

Question. Some common changes are classified in the given table :

Which of these changes are correctly matched?
A. 2, 4, and 5 only
B. 1, 3 and 5 only
C. 2 and 5 only
D. All of these
Answer : B

Question. Sonali mixed a packet of salt in a small amount of sand and then tried to recover the salt by the usual processes of sedimentation, decantation or filtration followed by evaporation. To her surprise, she could recover only a small part of the salt that she had taken. The possible reasons could be
I. Salt also got evaporated along with water.
II. The quantity of salt was much more than that required to form a saturated solution.
III. The undissolved salt remained mixed with sand.
IV. The quantity of water taken was insufficient to dissolve all the salt.
A. II and III only
B. I and IV only
C. II, III and IV only
D. All of these.
Answer : C

Question. Soham, a class 6 student, took four solid objects W, X, Y, and Z of different weights and made from the same plastic material of density 0.85 g/cm3 and placed them in beakers containing equal amount of water having density 1.0 g/cm3 as shown in the figure :

What would be his observation?
A. Objects X and Z will sink while W and Y will float.
B. Objects W and Y will sink while X and Z will float.
C. All four objects will sink.
D. All four objects will float.
Answer : D

Question. Refer to the given figure showing a typical plant with its parts labelled as U, V, W and X and read the following paragraph

P is a plant where part U is edible, plant Q has edible part W, plant R has edible part X whereas plant S has edible part V.
Select the option that correctly identifies these plants.
           P                       Q                 R                 S
A. Clove                  Mustard       Cumin          Ginger
B. Pomegranate      Rose            Orange        Turmeric
C. Pomegranate      Spinach       Clove           Radish
D. Cumin                 Rose           Spinach        Potato
Answer : C

Question. Select the incorrect option regarding the given figure of a neuron with its parts labelled as P, Q, R, S and T.

A. Part P of this neuron connects with part T of another neuron.
B. Part R is formed by wrapping of a special cel around S of the neuron.
C. Part Q is central vacuole that contains signal transmitting compounds.
D. Part P receives signals and part T carries signals out of the neuron
Answer : C

Question. On the basis of body covering, Rohit made four groups of three organisms each. In an attempt of doing so, he classified organisms incorrectly in one of the groups.
Identify this group and select the correct option.
A. Tortoise, Snail, Oyster
B. Fish, Snake, Lizard
C. Penguin, Ostrich, Bat
D. Hippopotamus, Whale, Cow
Answer : C

Question. Match column I with column II and select the correct option from the given codes.
    Column I            Column II
a. Iron                   (i) Beriberi
b. Vitamin B1         (ii) Anaemia
c. Vitamin C           (iii) Scurvy
d. Vitamin D          (iv) Goitre
e. Iodine                (v) Rickets
A. a - (ii), b - (i), c - (iii), d - (v), e - (iv)
B. a - (i), b - (iii), c - (iv), d - (v), e - (ii)
C. a - (iii), b - (ii), c - (iv), d - (v), e - (i)
D. a - (iv), b - (i), c - (v), d - (iii), e - (ii)
Answer : A

Question. A large number of fur seals and aquatic birds were found dead near a water body. The reason behind their death came out to be the failure of their temperature regulating system.
This indicates the occurrence of a/an _____________ recently.
A. Avalanche
B. Oil spill
C. Acid rain
D. Flood 
Answer : B

Question. The given relationship is based on eating habits of animals.
                                   Deer : Sparrow : Lion
Which of the following options satisfies the same relationship?
A. Tiger : Bear : Ant
B. Cow : Crow : Tiger
C. Lion : Goat : Leopard
D. Sheep : Panther : Bear
Answer : B

Question. Cinchona, isabgol, neem, Rauwolfia are
A. Oil yielding plants
B. Medicinal plants
C. Fibre yielding plants
D. Food plants.
Answer : B

Question. Equal sized square pieces of three different fabrics X, Y and Z were taken and spread out on a floor. Three small similar metal balls were each rolled with equal force from one end diagonally to the other end of fabric piece. Time taken by the balls to reach other end of fabric was noted to be as follows :

Now, select the correct option regarding this.
A. Fabric Z can be obtained from seeds of a plant and fabric Y can be obtained from stem of a plant.
B. Fabric Z can be obtained from the stem of a plant and fabric Y can be obtained from larva of an animal.
C. Fabric Y can be obtained from the fur of an animal and fabric X can be obtained from larva of an animal.
D. Fabric Y can be obtained from the fur of an animal and fabric Z can be obtained from larva of an animal.
Answer : B

Question. X is a stem modified to store food, while Y is a stem modified to make food. X and Y are respectively
A. Cactus and sweet potato
B. Onion and potato
C. Ginger and cactus
D. Dahlia and ginger.
Answer : C

Question. Refer to the given figures and select the correct option regarding these, when they are operating.

A. Object I converts mechanical energy into kinetic energy whereas object II converts electrical energy into potential energy.
B. Object II converts electrical energy into kinetic, heat and sound energy.
C. Object I converts potential energy into kinetic energy.
D. Both B and C
Answer : D

Question. If P represents the fibre and Q represents the fabric, find out the correct order in which Q is made from P.
A. P obtained from source, Weaving, Yarn, Spinning, Q
B. P obtained from source, Spinning, Weaving, Yarn, Q
C. P obtained from source, Spinning, Yarn, Weaving, Q
D. None of these
Answer : C

Question. ‘Reducing’ a part of garbage management can be exemplified by __________.
A. Carrying your own jute bag while shopping
B. Packing objects using least possible packing material
C. Using both sides of paper for writing
D. All of these
Answer : D

Question. In the textile industry, the given tool was used earlier to produce ______ from ________.

A. Fibre, Yarn
B. Yarn, Fibre
C. Fabric, Yarn
D. Yarn, Fabric
Answer : B

Question. Refer to the given flow chart and identify the components X, Y and Z of air?

A. X – Nitrogen, Y – Oxygen
B. Y – Carbon dioxide, Z – Oxygen
C. X – Oxygen, Z – Nitrogen
D. Y – Nitrogen, Z – Carbon dioxide
Answer : C

Question. Phyllotaxy is the arrangement of leaves on the stem.
Identify the three types of phyllotaxy shown in the given figures, X, Y and Z.

          X                Y                Z
A. Alternate     Opposite      Whorled
B. Opposite     Whorled       Alternate
C. Whorled      Alternate     Opposite
D. Opposite     Alternate     Whorled
Answer : A

Question. The given table shows the rank of three different minerals on the scale of hardness.

Based on the above data, which of the following results of scratch test will be obtained?

Answer : B

ACHIEVERS SECTION

Direction: Refer to the given paragraphs to answer questions a and b.
P is a joint that allows movement in one plane only and shows 180° of movement. The movement of car doors resembles the movement of bones between which this joint is present. This type of joint is found in our body at elbow and in skull.
Q joint allows movement in all directions and in more than one plane. This joint controls the movement of the humerus and femur bones. Movement of pestle in a mortar resembles the movement of bones in this joint.

Question a. The joints P and Q in the above paragraphs are respectively
A. Hinge joint, Pivot joint
B. Pivot joint, Ball and socket joint
C. Gliding joint, Hinge joint
D. Hinge joint, Ball and socket joint.
Answer : D

Question b. Some of the italicised words are mentioned incorrectly in the paragraphs. Select the correct option regarding them.
A. Femur should be replaced by tibia.
B. 180° should be replaced by 360°.
C. More than should be replaced by only.
D. Skull should be replaced by knee.
Answer : D

Question. A scientist conducted a study on four different species of organisms (W, X, Y and Z) that are related in an aquatic food chain. He estimated the total number of individuals in the population of each species and the average biomass of each individual.

Which of the following shows the correct relation of these species in a food chain?
A. Z → Y → W → X
B. X → W → Z → Y
C. X → W → Y → Z
D. Z → W → X → Y
Answer : A

Question. One of the four identical light bulbs in a series circuit has blown off as shown in the figure

Which of the following statements is correct about the bulbs?
A. R will not glow while P, Q and S will glow as before.
B. R will not glow while P, Q and S will glow brighter than before.
C. R will glow brighter than before while P, Q and S will glow as before.
D. All the bulbs P, Q, R and S will not glow.
Answer : D

Question. Observe the given Venn diagram carefully and fill in the blanks by choosing an appropriate option

Answer : C