CBSE Class 6 Science NSO Olympiad MCQs with Answers Set F

LOGICAL REASONING

Question. Trishika starts walking straight facing South. After walking 30 metres she turned to her right, walked 25 metres and turned to her left. Again after walking a distance of 10 metres she turned to her left. In which direction is she facing now?
A. West
B. East
C. North-East
D. South-West
Answer : B

Question. Select the CORRECT match

Answer : D

Question. Select a figure from the options which completes the pattern in Fig. (X).

Answer : D

Question. Mohit is 27th from the left end in a row of 49 boys and Samrath is 27th from the right end in the same row. How many boys are there between them in the row?
A. 6
B. 3
C. 5
D. Can't be determined
Answer : B

Question. Group the given figures into three classes using each figure only once.

A. 1, 5, 6; 2, 3, 4; 7, 8, 9
B. 1, 4, 7; 2, 5, 8; 3, 6, 9
C. 1, 2, 3; 4, 5, 8; 6, 7, 9
D. 1, 3, 5; 2, 4, 8; 6, 7, 9
Answer : A

Question. Pointing to a photograph, a man said, "She is the daughter of my grandfather's only son." How is the woman related to the man?
A. Mother
B. Daughter
C. Sister
D. Sister-in-law
Answer : C

Question. If 'P' denotes '×', 'R' denotes '÷', 'M' denotes '–' and 'W' denotes '+', then the value of 20 R 5 W 12 M 3 P 4 = ?
A. 4
B. 16
C. 28
D. 52
Answer : A

Question. Select the option which satisfies the same conditions of placement of the dots as in Fig. (X).

Answer : B

Question. If in a certain code language, UTENSIL is coded as WVGPUKN, which word would be coded as WINTER?
A. UGLRCP
B. UGLRPC
C. ULGRCP
D. PCRLGU
Answer : A

Question. Select the correct mirror image of the given figure, if the mirror is placed vertically to the left.

Answer : B

SCIENCE

Question. Which of the following arrangements of four bar magnets is not possible?

Answer : C

Question. A windmill is pushed by four external forces as shown in the figure.

Which of the following is not a possible set of forces P and Q for the windmill to be stationary ?
        P         Q
A. 10 N      8 N
B. 9 N        9 N
C. 2 N       16 N
D. 6 N       14 N
Answer : D

Question. Which of the following statements is correct?
A. Eclipse occurs due to reflection of light.
B. A person located in umbra region may not see the source of light directly.
C. Moon is a luminous body.
D. The size of the shadow depends on the size of object only.
Answer : B

Question. In which of the following does the fulcrum lie between the load and the effort ?

Answer : C

Question. Which of the following options correctly shows the image formed in the two given cases ?

Answer : D

Question. Submultiple micro is equal to
A. 1/1000000
B. 1/100000
C. 1/10000000
D. 1/1000
Answer : A

Question. Fill in the blanks by choosing an appropriate option.
Venus is the brightest planet in the Earth’s night sky.
Venus rotates from (i) to (ii) about its axis, and all the other planets rotate from (iii) to (iv) about their axes.
      (i)           (ii)        (iii)         (iv)
A. East       West     East       West
B. East       West     West      East
C. West      East      East       West
D. West      East      West      East
Answer : B

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

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

Question. In the given circuit, the three lamps are identical.
When switch S is closed then

A. Lamp P becomes dimmer
B. Lamp P is as bright as lamp Q
C. Lamp Q is not as bright as lamp R
D. Lamp P remains as bright as before
Answer : D

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. Saturn     Jupiter        Uranus      Neptune
B. Saturn     Uranus       Jupiter       Neptune
C. Jupiter     Neptune     Saturn       Uranus
D. Jupiter     Saturn        Neptune    Uranus
Answer : D

Question. Substances X, Y and Z have the following properties :
X : Elastic, opaque, non-edible
Y : Liquid, inflammable, edible
Z : Hard, floats on water, inflammable
X, Y and Z are respectively
A. Plastic, milk and iron nail
B. Sand, honey and soap
C. Rubber band, cooking oil and matchstick
D. Aluminium foil, shampoo and steel plate.
Answer : C

Question. The given figure shows the apparatus used to obtain pure water from sugar solution :

The processes occurring in apparatus I and II are respectively
A. Boiling and vaporisation
B. Sublimation and evaporation
C. Boiling and condensation
D. Melting and condensation.
Answer : C

Question. Which one of the following diagrams represents an example of an element-element mixture?

Answer : A

Question. Match the Column I with Column II and select the correct option from the given codes.

      P    Q    R    S
A. 4     2     1     3
B. 2     4     3     1
C. 3     2     1     4
D. 2     4     1     3
Answer : D

Question. During summer holidays while doing their science project, a group of class 6 students classified things around them as given in the table :

Materials classified incorrectly are
A. 3 and 4 only
B. 1 and 5 only
C. 2 and 5 only
D. None of these.
Answer : C

Question. While explaining the working of a clinical thermometer, Ms. Kusum, a science teacher explained that when temperature rises, mercury in the thermometer expands (Process I) and when temperature goes down, the mercury contracts and falls to a lower reading (Process II).
Which of the following statements are correct regarding the processes I and II?
(i) Both processes represent chemical changes.
(ii) Both processes are reversible.
(iii) Process I is a physical change and process II is a chemical change.
(iv) Both processes represent physical changes.
A. (ii) and (iv) only
B. (i) and (ii) only
C. (ii) and (iii) only
D. None of these
Answer : A

Question. When four different substances W, X, Y and Z are placed in a beaker, they get arranged in a way as shown in the figure :

Identify substances W, X, Y and Z.
        W                   X                    Y                        Z
A. Stone          Mustard oil      Mercury            Ice cube
B. Ice cube      Mercury          Mustard oil        Paper
C. Iron bar       Honey             Mustard oil        Wooden block
D. Mercury      Iron bar           Honey               Wooden block
Answer : C

Question. The given table shows some properties of three substances P, Q and R :

The following steps were carried out to obtain P from a mixture of P, Q and R :
1. Filtration 2. Evaporation
3. Magnetic separation 4. Addition of water
The sequence in which these steps should be carried out is
A. 4, 1, 2, 3
B. 3, 4, 2, 1
C. 3, 4, 1, 2
D. 4, 3, 2, 1
Answer : C

Question. A solid substance ‘X’ sublimes at 95°C. Which of the following figures represents the arrangement of particles of ‘X’ at 100°C?

Answer : A

Question. Read the given paragraph.
P is a bird that migrates from Arctic to Antarctica to escape cold weather conditions, Q is a fish which migrates from freshwater to sea to breed whereas R is also a fish which migrates from sea to freshwater to breed and S is an insect which migrates from Canada to Mexico to escape winters.
Identify organisms P, Q, R and S and select the correct option regarding them.
A. P almost covers a distance of 71000 km on average during its migration cycle.
B. Q completes its migration in single generation whereas R completes its migration in 5 generations.
C. S forms swarms which destroy and eat away crop fields that come in their way.
D. P is Siberian crane, Q is eel, R is salmon and S is Monarch butterfly.
Answer : A

Question. Which of the following does not involve a reflex arc?
A. Closing of the eyes when a foreign object flies into them
B. Kicking a soccer ball away when it is passed to you during a game
C. Stepping back when the toe is pricked by a thumbtack
D. Withdrawing the hand when it is burnt by a flame
Answer : B

Question. Refer to the given dichotomous key.
I. (a) Rock is formed from volcanic lava. – Go to II
(b) Rock is formed by deposition and cementing of small rock fragments under pressure within water bodies. – Go to III
II. (a) Formed when magma slowly cools down beneath the earth's surface – P
(b) Formed when lava quickly cools down on earth's surface – Q
III. (a) Formed when particles of sand get cemented together – R
(b) Formed from shells and skeletons of tiny sea creatures – S
Select the correct statement regarding P, Q, R and S.
A. P consists of minerals such as mica, quartz and feldspar.
B. Powdered Q is used by dentists for polishing teeth whereas surgeons use knives made of P for eye surgery.
C. R is used as a body scrubber whereas Red Fort in Delhi is made of S rock.
D. None of these
Answer : A

Question. Identify the incorrect statement from the following.
A. Matter exists in three forms.
B. Matter can be changed from one form to another.
C. A new substance is formed in a chemical change.
D. Ice is heavier than water.
Answer : D

Question. Read the following statements.
(i) Air dissolved in water cannot be removed from it.
(ii) Density of air decreases with increasing altitude.
(iii) Air is an element that surrounds the earth and makes earth hospitable for living organisms.
(iv) Air helps in pollination of several flowers and in the dispersal of seeds.
Which of the above statements are correct?
A. (i) and (ii) only
B. (ii) and (iv) only
C. (i) and (iii) only
D. (iii) and (iv) only
Answer : B

Question. Scientists selected and grew three different species of plants P, Q and R in a big field to investigate methods of seed dispersal in them. The given graphs show the approximate number of seedlings found at various radii around the parent plants.

Which of the following holds true regarding plants P, Q and R ?
A. Seeds of P are heavy and bear spines and hooks.
B. Seeds of Q are winged and light weighted.
C. Seeds of R are hairy or bear fibrous outer coat.
D. P can be Dandelion, Q can be Xanthium and R can be pea.
Answer : D

Question. Given below are the four food components (P-S) and their corresponding sources.
P – Meat, fish, eggs
Q – Butter, ghee, margarine
R – Bread, biscuits, potatoes
S – Amla, tomato, orange
Select the incorrect statement regarding these.
A. Deficiency of P causes marasmus in children and kwashiorkor only in adults.
B. Among P, Q, R and S, 1 gram of Q produces the maximum energy.
C. Excess of R gets stored in body cells and is used for production of energy whenever required.
D. Deficiency of S leads to a disease in which gums swell up and bleed.
Answer : A

Question. Refer to the given objects (1, 2 and 3) and identify the positions of fulcrum and load in each of these.

Answer : B

Question. Study the given food relationship and select the correct option which satisfies the same relationship.
                                              Honey : Carbohydrate : Sugarcane

A. Spinach : Iron : Liver
B. Maize : Protein : Fish
C. Fish oil : Vitamin A : Carrot
D. Groundnut : Fat : Milk
Answer : C

Question. Refer to the given food web.
If a population of an organism X is introduced in this community who preys on mice and snake then what will be the likely consequence over time ?

A. The population of owl will decline with time.
B. The populations of frog and sparrow will increase with time.
C. Plant and grasshopper population will remain unaffected by introduction of organism X.
D. Both A and B
Answer : D

Question. Refer to the given Venn diagram

What could be X and Y respectively?
A. X – Ability to trap and retain air, Y – Fluffy texture
B. X – Obtained from animals, Y – Ability to absorb water
C. X – Rough texture, Y – Comfortable to wear in hot and humid weather
D. X – Shiny appearance, Y – Give characteristic smell of burning paper when burnt
Answer : B

Question. Match column I (nutrient) with column II (function) and column III (deficiency symptom) and select the correct option from the given codes

A. P - (iii) - (b); Q - (i) - (c); R - (iv) - (a); S - (ii) - (d)
B. P - (ii) - (c); Q - (i) - (d); R - (iii) - (a); S - (iv) - (b)
C. P - (iv) - (a); Q - (ii) - (c); R - (i) - (b); S - (iii) - (d)
D. P - (i) - (b); Q - (iv) - (a); R - (iii) - (c); S - (ii) - (d)
Answer : A

Question. Read the given paragraph.
In the 16th and 17th centuries, sailors who went on long voyage suffered from a disease ‘X’ as they did not get fresh fruits to eat during the voyage. In the year 1747, a doctor named, James Lind discovered that if these sailors were given lemons and oranges, the disease was cured very quickly. This led to the discovery that X is a deficiency disease caused by the deficiency of Y.
Identify X and Y in the above paragraph and select the correct option.
          X                 Y
A. Pellagra     Vitamin B₁
B. Scurvy       Vitamin C
C. Goitre        Iodine
D. Rickets      Fluorine
Answer : B

Question. Ravi collected three different types of wastes P, Q and R from a human dwelling and left wastes P and Q in an open field while disposed off R by a manual method of waste disposal as it was toxic. The given graph shows the changes in amount of P, Q and R with time.

Refer to the above given graph and select the incorrect option regarding P, Q and R.
A. P could be a man-made object whereas Q is derived from living organisms.
B. The method used for disposing off R is often mployed in disposal of hospital wastes.
C. Management of wastes P and R by any manual method will always increase air and water pollution.
D. Q is disposed off by decomposition process which is slow but completely disposes off the waste.
Answer : C

Question. Refer to the given graph that shows how three different organisms P, Q and R cope with external environmental conditions and select the correct option regarding this.

A. P and R are warm blooded whereas Q is cold blooded.
B. R could be a mammal, Q could be an amphibian whereas P could be a reptile.
C. Q may show a wide range of distribution but P is restricted to areas with favourable environmental conditions.
D. P and R can tolerate extremes of temperatures and are cosmopolitan in distribution.
Answer : C

Question. Refer to the given classification table and select the correct option regarding P, Q, R and S.

A. P could be Aloe whereas Q could be Gloriosa.
B. P and R could be xerophytic plants.
C. R could be Rhoeo whereas S could be grapevine.
D. Q could be pea whereas S could be pumpkin.
Answer : B

ACHIEVERS SECTION

Question. Refer to the given flow chart and identify P, Q, R and S.

A. P - Salamander, Q- Snail, R - Cockroach, S-Tuna
B. P- Scorpion, Q- Octopus, R- Ladybird beetle, S- Ostrich
C. P- Earthworm, Q- Prawn, R-Tortoise, S-Scoliodon
D. P- Snake, Q-Toad, R- Crocodile, S- Centipede
Answer : C

Question. Saurabh classified living organisms in four groups (I, II, III and IV) each containing four members on the basis of the habitats in which they are found. In doing so he unknowingly placed one wrong member in each group. Identify the odd one out and select the correct option regarding this.
I. Acacia, Camel, Toucan, Aloe
II. Penguin, Fur seal, Polar bear, Lion-tailed macaque
III. Sea horse, Octopus, Corals, Silverfish
IV. Vallisneria, Chimpanzee, Red-eyed frog, Fern
A. In group I, toucan is placed incorrectly and should be replaced with Kangaroo rat.
B. Lion-tailed macaque is incorrectly mentioned in group II and should be included in group I.
C. In group III, sea horse is placed incorrectly and should be replaced with Ceratophyllum.
D. Vallisneria is wrongly placed in group IV and should be replaced with sea horse.
Answer : A

Question. The given diagram shows two identical bar magnets placed side by side. Four compasses are positioned at W, X, Y and Z.

Answer : C

Question. The given graph shows changes in populations of 3 interrelated organisms X, Y and Z in a community over some years.
What could be inferred from the given graph?

A. Organism X exclusively preyed upon organism Y until the whole population is wiped out.
B. Organism Z is the predator in the community whose population grew as long as its food lasted and then started decreasing.
C. Z is the predator of Y and Y is the predator of X.
D. Both B and C
Answer : D

Question. Read the given flowchart carefully and fill in the blanks by choosing an appropriate option.

Answer : B