CBSE Class 6 Science NSO Olympiad MCQs with Answers Set I

LOGICAL REASONING

Question. Select a figure from the options which will replace the (?) in the series as established by the Problem Figures.

Answer : A

Question. Six persons are sitting in a row facing North. P is third to the left of S, who is to the immediate right of R. U is at the one end and fourth to the right of Q. If T is between S and U, then R is ________ to the left of T.
A. Second
B. Third
C. Fourth
D. None of these
Answer : A

Question. In a certain code language, if 'nice big home' is coded as ‘emoh gib ecin’ and 'nice small family' is coded as ‘ylimaf llams ecin’, then in the same code language, 'all the best' is coded as ________.
A. tseb eht lla
B. tesb the lla
C. tseb eht all
D. tseb the lal
Answer : A

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

A. 13
B. 14
C. 15
D. None of these
Answer : C

Question. A watch reads 9:25. If the minute hand is in the North direction, then hour hand will be in ________ direction.
A. North-West
B. South-East
C. North-East
D. South-West
Answer : B

Question. Which of the following Venn diagrams best represents the relationship amongst, "Polygons, Quadrilaterals and Triangles"?

Answer : A

Question. If every alternate letter starting from C is deleted from the given series, then which of the following will be the eighth letter from the left end in the new series formed?
A C B E D G F I H K J M L O N Q P S R U T W V Y X Z
A. L
B. J
C. N
D. P
Answer : C

Question. Find the missing number, if same rule is followed in all the three figures.

A. 5
B. 10
C. 15
D. 20
Answer : C

Question. What is the minimum number of different colours required to colour the given figure such that no two adjacent regions have the same colour?

A. 3
B. 2
C. 4
D. 5
Answer : A

Question. Select the correct water image of the given figure

Answer : B

SCIENCE

Question. The figure shows two pieces of steel P and Q arranged in line with a bar magnet

Which of the following is ture about the magnetic forces on P and Q?
     Force on P       Force on Q
A. Attractive          Repulsive
B. Attractive          Attractive
C. Repulsive         Repulsive
D. Repulsive         Attractive
Answer : B

Question. There are four different circuits with bulbs(identical) and batteries as shown here.

In which circuit will the bulb(s) be the brightest?
A. Circuit P
B. Circuit Q
C. Circuit R
D. Circuit S
Answer : C

Question. Column II has approximate values of five quantities given in column I. Match column I with column II and select the correct option from the given codes.
             Column I                                Column II
P. Radius of the Earth                      (i) 0.3 nm
Q. Average height of a person         (ii) 1.55 m
R. Thickness of a piece                   (iii) 6 Mm of paper
S. Distance from Delhi to                (iv) 0.2 mm Kolkata
T. Size of a water molecule             (v) 1500 km
A. P - (v), Q - (iii), R - (i), S - (iv), T - (ii)
B. P - (i), Q - (ii), R - (iii), S - (iv), T - (v)
C. P - (iii), Q - (ii), R - (iv), S - (v), T - (i)
D. P - (iii), Q - (iv), R - (i), S - (v), T - (ii)
Answer : C

Question. A rider on horse falls back when horse starts running all of a sudden because
A. Acceleration of horse is less than that of rider
B. Rider is suddenly afraid of falling
C. Inertia of rest keeps the upper part of body at rest while lower part of the body moves forward with the horse
D. Inertia of motion keeps the upper part of body at rest while lower part of the body moves forward with the horse.
Answer : C

Question. A cat was kept inside a box. Four boys are trying to see the cat through four tubes inserted into the box as shown in the figure.

Which of the following boy(s) would be able to see the cat in the box?
A. Mohan only
B. Hari only
C. Mohan and Hari only
D. Raj and Sohan only
Answer : C

Question. Three magnets P, Q and R were dipped one by one in a heap of iron filings. Figure shows the amount of the iron filings sticking to them.

The strength of these magnets will be
A. P > Q > R
B. P < Q < R
C. P = Q = R
D. P < Q > R
Answer : A

Question. Which of the following statements is/are true ?
I. A force can change the shape of an object.
II. A force cannot change the direction of a moving object.
III. A force can be applied to stop a moving object.
A. I only
B. III only
C. I and III only
D. I, II and III
Answer : C

Question. Four boys are reading the temperature on the thermometer as shown in the figure.

Which of the boys is reading the temperature on the thermometer correctly?
A. Sakib
B. Jon
C. Arpit
D. Rohan
Answer : B

Question. Match column I with column II and select the correct option from the given codes.
    Column I           Column II
P. Venus            (i) Morning star
Q. Saturn          (ii) Fastest spinning planet
R. Jupiter          (iii) Rings made of ice, rocks and dust
A. P - (i), Q - (ii), R - (iii)
B. P - (ii), Q - (i), R - (iii)
C. P - (i), Q - (iii), R - (ii)
D. P - (iii), Q - (i), R - (ii)
Answer : C

Question. A solid ball is released from the top of a slope as shown in the figure.

What will happen to the ball's kinetic and potential energy as it slips down the slope at a constant speed?
    Kinetic energy                  Potential energy
A. Increases                          Decreases
B. Remains unchanged         Decreases
C. Increases                          Increases
D. Remains unchanged        Remains unchanged
Answer : B

Question. Sachita has categorised the processes (I-IV) into different types of changes given in the box :
1. Desirable 2. Chemical 3. Physical
4. Exothermic 5. Periodic 6 . Endothermic
I. Ripening of crops - 1, 2
II. Occurrence of day and night - 5, 6
III. Volcanic eruption - 2, 4
IV. Deposition of dry ice - 3, 6
Select the incorrect classification.
A. I and III only
B. III and IV only
C. II and IV only
D. None of these
Answer : C

Question. Study the given table

Select the option that correctly identifies any two of them.
A. P - Rubber, R - Wood
B. Q - Copper, R - Plastic
C. P - Rubber, Q - Iron
D. Q - Wood, R - Glass
Answer : C

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

A. P - (i), (iii); Q - (ii), (v); R - (ii), (iv); S - (i), (iii)
B. P - (i), (iii); Q - (ii); R - (ii), (iv), (v); S - (iii)
C. P - (iii); Q - (i), (ii); R - (iii), (v); S - (iii)
D. P - (iv), (v); Q - (i), (iii); R - (ii); S - (iv)
Answer : B

Question. The given figures show arrangement of particles of a substance 'P' at different temperatures :

Which of the following statements is correct?
A. Melting point of the substance 'P' is below 42°C.
B. Particles of the substance 'P' at 115°C have less kinetic energy than at 65°C.
C. Boiling point of the substance 'P' is between 65°C and 115°C.
D. All of these
Answer : C

Question. Which of the following statements are incorrect?
I. Mixture of kidney beans and chick peas can be separated by winnowing.
II. Salt from sea water can be obtained on a large scale by evaporation.
III. An alloy is a homogeneous mixture of a metal with another metal or non-metals.
IV. Seeds of wheat can be separated from a bundle of wheat stalks by sieving.
A. II and III only
B. I and IV only
C. I, III and IV only
D. None of these
Answer : B

Question. Read the given statements and select the correct option.
Statement 1 : When sea water is allowed to stand in
shallow pits, water gets heated by sunlight and slowly turns into water vapour through evaporation. 
Statement 2 : Boiling takes place at all temperatures.
A. Both statements 1 and 2 are true and statement 2 is 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 but statement 2 is false.
D. Both statements 1 and 2 are false.
Answer : C

Question. Three identical towels were hung out to dry under different conditions.

Arrange them in order, beginning with the towel that would take the shortest time to dry.
A. X, Y, Z
B. Z, X, Y
C. Z, Y, X
D. Y, X, Z
Answer : C

Question. Identify the incorrect statement from the following.
A. Interparticle distance is more in helium than in gold.
B. Nitrogen has no definite shape as well as no definite volume.
C. Mercury is lighter than water.
D. Potassium is a reactive metal
Answer : C

Question. Manu placed three different types of materials I, II and III in front of letters P, Q and R as shown in the figure and tried to look from the other side of each.

Which of the following is correct?
A. Material II is frosted glass.
B. Material I is glass window.
C. Material III is wooden door.
D. All of these
Answer : B

Question. Study the given flow chart and select the option that correctly identifies the organisms P, Q, R and S.

         P                      Q                  R                       S
A. Dionaea            Hydra           Amoeba          Nepenthes
B. Ocimum            Agaricus      Tapeworm        Bison
C. Nepenthes        Cuscuta       Porcupine        Opossum
D. Spirogyra          Amoeba       Hyena              Leech
Answer : B

Question. Study the given list of adaptations in plants.
(a) Leaves reduced into spines
(b) Drip tips
(c) Sloping branch
(d) Fleshy stem
(e) Thick waxy layer on stem
(f) Cone shaped trees
(g) Photosynthetic stem
Which of the given adaptations are of plants inhabiting rainforests (X), mountains (Y) and deserts (Z)?

Answer : D

Question. Priya met with an accident while going to school.
Luckily she did not get any serious injury but she is having constant pain in her elbows and knees and finds difficulty in bending her arms and kneeling down. Identify her injured joints and select the correct option regarding them.
A. Her injured joints are those joints which allow free movement of bones in all planes.
B. Her injured joints are those joints whose movement resembles the movement of mortar and pestle.
C. Her injured joints are those joints in which the ball shaped surface of one rounded bone fits into the cup like depression of another bone.
D. Her injured joints are those joints which allow movement of bones in one plane only.
Answer : D

Question. Rohan prepared a list of cellulosic fibres obtained from the stem of a plant. By mistake he put some wrong fibres in the list. Select the option that groups only the cellulosic fibres obtained from a plant stem.
(i) Linen (ii) Hemp
(iii) Shahtoosh (iv) Mink
(v) Kapok (vi) Jute
(vii) Coconut (viii) Cotton
(ix) Rayon (x) Acrylic
A. (i), (iii), (iv), (vii) and (x) only
B. (i), (ii) and (vi) only
C. (iii), (v), (vi) and (ix) only
D. (i), (ii), (vi) and (viii) only
Answer : B

Question. Which option correctly identifies P - S in the given flow chart?

Answer : B

Question. Prashant tested some food items and tabulated the results as follows

Identify X, Y and Z and select the incorrect statement.
A. Y helps in formation of haemoglobin which carries oxygen from one part of the body to another.
B. X helps in formation of antibodies in our body which fight infection and protect us from diseases.
C. Same amount of Z provides more energy as compared to X.
D. Z forms shock absorbing cushion around our internal organs
Answer : B

Question. Refer to the given relationship.
          Sandstone : Quartzite
Select the option which satisfies the same relationship.
A. Obsidian : Basalt
B. Granite : Pumice
C. Slate : Shale
D. Conglomerate : Gneiss
Answer : D

Question. Study the given table.

Select the correct option for (i), (ii), (iii) and (iv).

Answer : C

Question. Tripti made four sets of different plants based on their edible parts as shown here.

Which of these sets are correct?
A. I and III only
B. II and IV only
C. I and II only
D. I and IV only
Answer : D

Question. Refer to the given Venn diagram and select the correct option for X, Y and Z.

A. X could be beans whereas Y could be cotton shirt.
B. Y could be rotten fruits whereas Z could be aluminium can.
C. X could be animal excreta whereas Y could be plastic container.
D. X could be used syringe whereas Z could be dead leaves.
Answer : C

Question. Read the given passage.
P, Q and R are the vertebrates which possess flippers.
P is cold blooded animal whereas Q and R are warm blooded animals. Q possesses feathers as body covering whereas R possesses hair as body covering.
Which option correctly identifies P-R?
A. P - Frog; Q - Penguin; R - Turtle
B. P - Turtle; Q - Seal; R - Platypus
C. P - Seal; Q - Frog; R - Penguin
D. P - Turtle; Q - Penguin; R - Seal
Answer : D

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

A. (i) - (e); (ii) - (b); (iii) - (a); (iv) - (c); (v) - (d)
B. (i) - (d); (ii) - (e); (iii) - (b); (iv) - (a); (v) - (c)
C. (i) - (e); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (d)
D. (i) - (d); (ii) - (a); (iii) - (b); (iv) - (c); (v) - (e)
Answer : A

Question. Identify the correct option regarding P – S from the given flow chart.

A. S may be a non-flowering plant.
B. P could be Hydrilla whereas Q could be Vallisneria.
C. P leaves may possess specialised tips called drip tips whereas leaves of R lack stomata.
D. S could be spruce whereas R could be pine.
Answer : A

Question. On a cold winter day, Sohan put a room heater near his aquarium, which made water in the aquarium warm but not hot.
What could happen due to this?
A. Fishes would feel more comfortable in warm water due to more availability of oxygen.
B. Fishes would suffocate due to less availability of oxygen for breathing.
C. Fishes would die due to decrease in amount of carbon dioxide dissolved in warm water.
D. Fishes would feel more comfortable in warm water due to decrease in amount of dissolved carbon dioxide.
Answer : B

Question. Refer to the given flow chart.

Identify P, Q and R and select the incorrect statement.
A. During the process of burning, P is used up and Q is given out.
B. Autotrophs could be the only source of P in the atmosphere.
C. Q is used in fire extinguishers as it extinguishes fire.
D. In atmospheric air, R is present in highest percentage whereas P is present in lowest percentage.
Answer : D

Question. Which of the following is a correct match?
A. Waste from farmyards and food courts – Domestic waste
B. Pesticides, pharmaceuticals and heavy metal sludge – Biodegradable waste
C. Peels of fruits and vegetables, tea leaves – Organic waste
D. Mineral wastes from mining and rubber waste – Kitchen waste
Answer : C

ACHIEVERS SECTION

Question. Aquil used a strong magnet to stroke the iron nail fifty times in the same direction continuously. After stroking, he wanted to test it by bringing a compass near the tip of the nail. Which one of the following diagrams shows the correct observation?

Answer : D

Question. Study the given Venn diagram and fill in the blanks

Answer : D

Question. Refer to the given graph plotted for three different fabric pieces of equal size P, Q and R on the basis of their water absorbing capacity and select the correct statement.

A. P is made up of fibres obtained from Gossypium plant whereas R is made up of fibres obtained from an insect.
B. Q is made up of protein fibres obtained from an insect whereas R is made up of cellulose fibres obtained from flower of a plant.
C. R is made up of fibres obtained from plant stem by the process of retting whereas P is made up of fibres obtained from plant seed by the process of ginning.
D. P is biodegradable whereas Q and R are nonbiodegradable.
Answer : A

Question. Read the given passage where few words have been italicised.
Iron is a very important food component. It takes part in formation of thyroid hormone secreted by parathyroid glands of our body. It is a trilobed gland located in the neck region. Iron deficiency can lead to malfunctioning of the gland causing hypo or hyper secretion of thyroid hormone. This leads to disease like osteomalacia.
Foods like orange and spinach are recommended to the patient suffering from this condition.
Select the correct option regarding this.
A. Iron should be replaced by iodine.
B. Parathyroid should be replaced by thyroid and osteomalacia should be replaced by anaemia.
C. Trilobed should be replaced by tetralobed.
D. Orange and spinach should not be replaced as they are correctly mentioned
Answer : A

Question. Refer to the given dichotomous key.
I. (a) It conducts food, water and minerals to different parts of the plant. -Go to II
(b) It absorbs water. -Go to III
II. (a) It is modified to climb. - P
(b) It is modified to store water. - Q
III. (a) It is modified to climb. - R
(b) It is modified to absorb moisture from air. - S
Select the incorrect option regarding P – S.
A. P could be tendril of grapevine whereas S could be prop roots of banyan.
B. Q could be stem of Opuntia whereas R could be climbing root of betel.
C. P could be tendril of Cucurbita whereas R could be climbing root of ivy.
D. P could be tendril of passion flower whereas S could be aerial root of orchid.
Answer : A