CBSE Class 6 Science NSO Olympiad MCQs with Answers Set G

LOGICAL REASONING

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

Answer : D

Question. Pointing to a lady Abhinav said, "She is the mother of my father's sister". How is that lady related to Abhinav?
A. Aunt
B. Mother
C. Grandmother
D. Daughter
Answer : C

Question. The sheet of a paper shown in Fig. (X) is folded to form a cube. Select the figure from the options that is similar to the cube formed by folding the given sheet

Answer : C

Question. In a certain code language, 'SOMEDAY' is written as 'RNLDCZX'. How will 'HEALTHY' be written in that code language?
A. GDZKSGX
B. GDZKSIZ
C. GDZMUGX
D. GFZMSGZ
Answer : A

Question. Select the correct water image of Fig. (X).

Answer : B

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

Answer : D

Question. How many 9's are there which are preceded by 3 but not followed by 6 in the given number series?
6 9 3 9 3 6 6 3 9 5 9 3 9 6 8 9 3 9 7 3 9 6 3 9 5
A. 4
B. 8
C. 5
D. 7
Answer : A

Question. If 'a' denotes '+', 'b' denotes '÷', 'c' denotes '–' and 'd' denotes '×', then find the value of 28b7d8c6a4.
A. −3/2
B. 32
C. 30
D. 34
Answer : C

Question. Shalu is facing towards South-West and turns through 45° clockwise, 135° anticlockwise and 45° anticlockwise again. In which direction is she facing now?
A. North
B. East
C. South-East
D. North-East
Answer : B

Question. In which of the following figures, Fig. (X) is exactly embedded as one of its part?

Answer : C

SCIENCE

Question. Which of the following statements are incorrect?
(i) A bag placed below the seat of a moving bus is in motion with respect to the floor of the bus.
(ii) While measuring length of an object using a metre scale, use the zero-mark even if the ends are worn out.
(iii) Blinking of eyes is an example of periodic motion.
(iv) If a body as a whole moves around in a circular path, the motion is known as revolution.
A. (i), (ii) and (iv) only
B. (i), (ii) and (iii) only
C. (ii), (iii) and (iv) only
D. (i), (iii) and (iv) only
Answer : B

Question. Which of the following are possible sets of polarity when magnetising a steel bar PQ by the stroking method? (For magnets, N indicates north pole and S indicates south pole)

(i) 1 = N, 2 = S, P = N, Q = S
(ii) 1 = N, 2 = S, P = S, Q = N
(iii) 1 = S, 2 = N, P = S, Q = N
(iv) 1 = S, 2 = N, P = N, Q = S
A. (i) and (ii) only
B. (iii) and (iv) only
C. (i) and (iii) only
D. (ii) and (iv) only
Answer : D

Question. Rohan and Rahul made diary entries of Moon’s phases at different times of a year. The entries are shown below.

Select the option that correctly identifies the entries that should come at the place of question marks

Answer : A

Question. A 1 m long uniform beam is being balanced as shown.
Find the force X.

A. 2 N
B. 3 N
C. 7 N
D. 10 N
Answer : D

Question. Read the given statements and select the correct option.
Statement 1 : A solar eclipse always takes place on a new moon day.
Statement 2 : During a solar eclipse, the dark side of the Moon faces the Earth.
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 but statement 2 is false.
D. Statement 1 is false but statement 2 is true.
Answer : A

Question. A block of ice is sliding at a constant speed before moving up a smooth slope as shown in figure. Which of the following options is true about its energy as it is sliding up the slope

    Kinetic energy        Potential energy
A. Increases                 Decreases
B. Increases                 Increases
C. Decreases               Increases
D. Decreases               Decreases
Answer : C

Question. Which of the following statements are correct?
(i) The shape of a shadow depends on the position of the source of light.
(ii) A plane mirror can change the direction of light falling on it.
(iii) A pinhole camera forms an erect image of an object on a screen.
(iv) A shadow is formed when light passes through a transparent object.
A. (i) and (iii) only
B. (ii) and (iv) only
C. (i), (ii) and (iii) only
D. (i) and (ii) only
Answer : D

18. A beaker containing 1 kg of ice at 0°C is floating in a bucket that contains 4 kg of water at 0°C. Which of the following statements is correct regarding this?
A. Heat flows from ice to water.
B. Heat flows from water to ice.
C. No heat flows between ice and water.
D. Ice will melt completely.
Answer : C

Question. Fill in the blanks with the most appropriate option.
Although a number of objects, such as kites, birds, aeroplanes move in space, their shadows are not seen on the Earth. This is due to the reason that the (i) , the region of complete (ii) is not able to reach the Earth. The region of partial (iii) , that is the (iv) reaching the Earth is too large and too faint to be visible to us.
         (i)                     (ii)                 (iii)                (iv)
A. Penumbra      Darkness       Brightness       Umbra
B. Penumbra      Brightness     Darkness         Umbra
C. Umbra           Darkness       Brightness       Penumbra
D. Umbra           Brightness     Darkness         Penumbra
Answer : C

Question. Match column I (types of motion) with column II (example) and select the correct option from the given codes.
      Column I                Column II
P. Rotatory         (i) Motion of pendulum of a clock
Q. Oscillatory     (ii) Motion of a ceiling fan
R. Circular         (iii) Motion of a rocket in space
S. Curvilinear    (iv) Motion of the tip of minute hand of a wrist watch
 P Q R S
A. (iv) (i) (iii) (ii)
B. (i) (iv) (iii) (ii)
C. (ii) (i) (iv) (iii)
D. (iii) (ii) (i) (iv)
Answer : C

Question. What happens to particles of ammonium chloride when it undergoes sublimation?
A. Particles gain energy, move faster, come closer and change to liquid state.
B. Particles gain energy, move faster, come closer and change to gaseous state.
C. Particles gain energy, move faster, go away from each other and change to gaseous state.
D. Particles lose energy and move far away from each other to change into gaseous state.
Answer : C

Question. Match column I with column II and select the correct option from the given codes.
            Column I                           Column II
P. Chalk-water mixture        (i) A gaseous mixture
Q. Glucose solution            (ii) A solid-gas mixture
R. Fizzy drink                     (iii) A h o m o g e n e o u s solid-liquid mixture
S. Smoke                           (iv) A h etero g en eo u s solid-liquid mixture
T. Air                                   (v) A gas-liquid mixture
A. P - (iii), Q - (iv), R - (v), S - (i), T - (ii)
B. P - (v), Q - (iii), R - (iv), S - (ii), T - (i)
C. P - (ii), Q - (i), R - (iv), S - (v), T - (iii)
D. P - (iv), Q - (iii), R - (v), S - (ii), T - (i)
Answer : D

Question. Vedant, a class-6 student has classified a few changes as shown in the table :

Changes classified incorrectly are
A. I and III only
B. I and V only
C. II and V only
D. II, IV and V only.
Answer : D

Question. Rohan is trying to look through a material X.

Which of the following statements is true? 
A. If material X is frosted glass, Rohan will be able to see clearly through it.
B. If material X is aluminium foil, Rohan will be able to see partially through it.
C. If material X is a chart paper, Rohan will be able to see clearly through it.
D. None of these.
Answer : D

Question. Study the given Venn diagram carefully and identify P, Q, R and S.

           P                   Q                        R               S
A. Milk              Honey                 Shampoo     Petrol
B. Kerosene     Plasticine            Honey          Olive oil
C. Butter          Spirit                   Shampoo      Honey
D. Camphor     Soap solution     Fruit jelly       Mustard oil
Answer : D

Question. A few methods of separation are represented with the help of examples as :
W : Alum is added to muddy water to settle the mud particles at the bottom.
X : Salt is separated from saline water without any loss of water.
Y : Sand is separated from gravel at a construction site.
Z : Chilli powder is separated from its mixture with water.
W, X, Y and Z are respectively
A. Loading, evaporation, sedimentation and sieving
B. Filtration, decantation, sieving and winnowing
C. Evaporation, winnowing, sedimentation and sieving
D. Loading, distillation, sieving and filtration
Answer : D

Question. The given figure represents the arrangement of molecules in different states of matter

Which of the following statements are correct?
I. Processes P, Q, R, S and T, all are reversible.
II. Processes P, Q and S involve absorption of energy.
III. Processes R, S and T involve evolution of energy.
IV. Process P represents process S + process Q.
A. I and III only
B. I and IV only
C. II and IV only
D. I, II and IV only
Answer : D

Question. Study the given table carefully.

The substance which will sink in mercury and the substance which will float in alcohol are respectively
A. Iron and gold
B. Gold and cork
C. Gold and iron
D. Cork and gold.
Answer : B

Question. Ms Naina, a science teacher divided the class into four
groups and each group was given different mixtures :
Group I : Sand and iron filings
Group II : Oil and water
Group III : Salt and sand
Group IV : Wheat and husk
Which of the following methods should each group use
to separate the components of mixtures given to them?

Answer : A

Question. Select the option that groups rocks of two different kinds as shown in the box.
                                      Conglomerate :: Obsidian
A. Slate :: Sandstone
B. Gneiss :: Shale
C. Limestone :: Granite
D. Slate :: Pumice
Answer : C

Question. Refer to the given Venn diagram and select the correct option regarding X and Y.

A. X could be DDT whereas Y could be bones.
B. X could be human faeces whereas Y could be scissors.
C. X could be rotten vegetables whereas Y could be cardboard.
D. X could be cowdung whereas Y could be dried leaves.
Answer : B

Question. Refer to the given flow chart

Identify P, Q, R and S and select the correct option.
       P               Q               R                    S
A. Oyster      Turtle        Pigeon         Grasshopper
B. Tortoise    Clam         Butterfly       Sparrow
C. Oyster      Tortoise    Mosquito      Housefly
D. Snail         Turtle        Robin           Stork
Answer : B

Question. Refer to the given figures P and Q which represent different joints in our body. Identify these joints and select the correct option.

A. Joint P allows 360° of movement whereas joint Q allows only 90° of movement.
B. Both joints P and Q allow movement in one plane only.
C. Joint P is present in our shoulders and hips whereas joint Q is present between our neck and skull.
D. Joint P is ball and socket joint whereas joint Q is hinge joint.
Answer : D

Question. In order to find out the rate of decomposition of three types of solid waste, X, Y and Z, scientists dumped these wastes in a restricted open low lying area. The given graph shows the rate of decomposition of these wastes.

Which of the following correctly identifies X, Y and Z?
A. X-Wooden chair, Y-Fruit peel, Z-Syringe
B. X-Plastic tumbler, Y-Iron nail, Z-Wrist watch
C. X-Metal bangles, Y-Cotton shirt, Z-Cooked beans
D. X-Animal excreta, Y-Newspaper, Z-Wooden box
Answer : C

Question. Prashant categorised living organisms on the basis of their habitats. He made four groups of four organisms each. By mistake he placed one wrong member in each group. Identify the wrong member and select the correct option.
Group I : Meerkat, Fennec fox, Camel, Penguin
Group II : Polar bear, Musk ox, Blackbuck, Caribou
Group III : Carp, Climbing perch, Arowana, Sloth
Group IV : White oryx, Toucan, Lion-tailed macaque, Poison dart frog
A. Penguin in group I should be interchanged with Caribou in group II.
B. Sloth in group III should be replaced with Eel.
C. Musk ox in group II should be replaced with Lynx whereas Carp in group III should be replaced with Armadillo.
D. White oryx in group IV should be interchanged with Meerkat in group I.
Answer : B

Question. Refer to the given figure and select the correct option regarding its parts labelled P, Q, R, S and T.

A. P is the main reproductive organ in plants but in some lants like broccoli and cabbage it gets modified to store food.
B. After reproduction, P changes to Q which is always edible in all plants.
C. T stores food and becomes swollen in plants like turnip, potato and Dahlia.
D. Fenugreek and lettuce have edible R which are reduced to spines in Opuntia whereas ginger has edible S, which stores water and becomes photosynthetic in some cacti.
Answer : D

Question. The method shown below is used to obtain X from a mixture of X and water.

Which of the following properties of X can you deduce from this?
A. X has a high melting point.
B. X has a low melting point.
C. X is insoluble in water.
D. X is soluble in water
Answer : C

Question. Refer to the given figure.

Identify P, Q, R and S and select the correct option regarding them.
A. Q controls hormone production, behaviour and body temperature
B. P regulates heart beat and blood circulation.
C. R controls musculo-skeletal movements and maintains balance and posture.
D. S relays information between spinal cord and brain.
Answer : A

Question. Read the given passage where some of the words have been italicised.
Cotton plant is annual shrub. It grows best in cold climate. Black soil is best suited for the cultivation of cotton plant. The stems of cotton plant are called cotton bolls. The seeds with cotton fibres are picked from the cotton bolls by hand. After picking, the fibres are separated from the seeds by a process called combing.
Select the correct option regarding this.
A. Annual should be replaced by biennial.
B. Cold should not be replaced as it is correctly mentioned.
C. Black should be replaced by yellow and stems should be replaced by fruits.
D. Combing should be replaced by ginning.
Answer : D

Question. Which of the following is not a structural adaptation?
A. Camels have long eyelashes to protect their eyes from dust storm.
B. Some animals migrate from less favourable to more favourable places in search of food and to escape harsh weather.
C. Stem of cactus becomes fleshy to store water and also performs photosynthesis.
D. Some aquatic plants have reduced root system and dissected ribbon like leaves.
Answer : B

Question. Read the statements regarding the given food web and select the option that consists of all correct statements.

(i) There are 7 interconnected food chains in the given food web.
(ii) Snake and fox serve as top consumers in the given food web.
(iii) Snake serves as primary, secondary as well as tertiary consumer in the given food web.
(iv) If populations of rat and rabbit are removed from this community then populations of snake and fox will be equally affected negatively.
(v) There are four primary consumers and two secondary consumers in the given food web.
(vi) If the populations of top consumers are removed from this food web then populations of all primary consumers of web will decline.
A. (iv) and (v) only
B. (i), (iii) and (v) only
C. (i) and (ii) only
D. (ii), (iv) and (vi) only
Answer : C

Question. Observe the given experimental figures carefully.
What does this experiment prove?

A. Material X contains proteins.
B. Material X contains carbohydrates.
C. Material X contains fats.
D. Material X contains iodine.
Answer : A

Question. Refer to the given flow chart.

Identify P, Q, R and S and select the correct option

Answer : B

Question. Riya grouped plants broadly on the basis of type of venation present in their leaves. In one of the groups she placed an incorrect member by mistake. Identify this group and select the correct option.
A. Petunia, Hibiscus, Rose
B. Maize, Palm, Peepal
C. Grass, Wheat, Banana
D. Basil, Neem, Mango
Answer : B

Question. Which of the following statements is correct regarding flax plant?
A. It is a food and fibre crop.
B. Fabric made from the fibres of this plant is called linen.
C. The fibres are extracted from the stem of this plant.
D. All of these
Answer : D

ACHIEVERS SECTION

Question. Read the given passage and fill in the blanks by choosing an appropriate option.
There are some changes in which heat from outside is absorbed leaving the surroundings cooler while in other changes heat is given out making the surroundings warmer. A change in which heat is given out is called a/an (i) change e.g., (ii) , while a change in which heat is taken in is called a/an (iii) change e.g., (iv) . There are many changes in which heat is neither given out nor taken in e.g., (v) .

Answer : C

Question. Refer to the given dichotomous key.
I (a) It is a mineral nutrient. - Go to II
(b) It is a vitamin. - Go to III
II (a) It is a constituent of haemoglobin. - P
(b) It is a constituent of thyroxine hormone. - Q
III (a) It helps in clotting of blood. - R
(b) It helps in building strong bones and teeth. - S
Identify P, Q, R, and S and select the correct option regarding them.
A. Deficiency of P causes a disorder called anaemia which can also be caused by deficiency of a vitamin known as B12.
B. Our body is capable of manufacturing Q so we need not supplement it externally through our diet.
C. Deficiency of R causes beriberi in children and pellagra in adults.
D. S also helps in building resistance against infection in children and is found abundantly in citrus fruits.
Answer : A

Question. The given figure shows an electric circuit in which a lamp L is connected. What happens to the brightness of the lamp L when the switch S is closed?
(Box represents extra resistance in the circuit.)

A. It becomes dimmer.
B. It becomes brighter.
C. It goes off.
D. It remains the same
Answer : B

Question. The given graph shows the amount of water absorbed by four fabrics W, X, Y and Z of same size when put in four separate beakers containing equal amounts of water.
Identify the fabrics and select the incorrect option regarding them.

A. Y could be obtained from an insect whereas Z could be obtained from a mammal.
B. Fibre of fabric W shrinks when burnt and melts into very hot bead that drips dangerously.
C. Fibres of fabric X are obtained without harming the source organism and can be repeatedly obtained from the same organism.
D. Fabric W is made up of synthetic fibres, X is composed of cellulosic fibres whereas Y and Z are made up of protein fibres.
Answer : A

Question. Read the given paragraph.
Process P helps in drying up of our wet clothes when hung on clothesline under sunlight. Process Q makes the mirror in our washroom foggy when we take hot shower. Process R is responsible for loss of water present in soil through leaves of plants. Identify the processes and select the correct option regarding them.
A. All the processes P, Q and R involve the change of state of matter.
B. Process P decelerates with increase in temperature whereas processes Q and R speed up with increase in temperature.
C. In absence of process Q, water present in atmosphere will not precipitate or fall down on Earth’s surface.
D. Both A and C
Answer : D