CBSE Class 6 Science NSO Olympiad MCQs with Answers Set J

LOGICAL REASONING

Question. If second Saturday and all Sundays are holidays in a 30 days month beginning with Saturday, then how many days are working in that month?
A. 20
B. 24
C. 22
D. 23
Answer : B

Question. Some letters are coded as follows :

The word which is coded as $ * × + g ≠ £ is ______.
A. OLYMPIAD
B. OLYNTHUS
C. OLYMPICS
D. OLYMPUS
Answer : D

Question. In which of the following options, given figure is exactly embedded as one of its parts?

Answer : C

Question. Select a figure from the options which will complete the pattern in the given figure.

Answer : B

Question. Select the correct mirror image of the given figure

Answer : A

Question. Which of the following Venn diagrams best depicts the relationship amongst, 'India, Asia and Australia’?

Answer : C

Question. P, Q, R, S and T are to be seated in a row facing East, but R and S cannot be together. Also, Q cannot be at third place. If P and Q are together and R is at the first place, then which of the following cannot be true?
A. S is at the second place.
B. S is at the third place.
C. P is at the third place.
D. None of these
Answer : A

Question. Select a figure from the options which will continue the given series.

Answer : A

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

A. 392
B. 382
C. 374
D. 375
Answer : C

Question. If + is called ×, ÷ is called + and – is called ÷, then which of the following is divisible by the result of the given expression?
175 – 25 ÷ 5 + 30
A. 157
B. 308
C. 450
D. 385
Answer : A

SCIENCE

Question. Which of the following statements is/are incorrect?
I. Metric system is a standard unit of measurement and it was given by the French scientists.
II. International system of measurements is abbreviated as SI.
III. Convenient unit for distance between Delhi and Mumbai is metre.
A. I only
B. III only
C. II and III only
D. I and II only
Answer : C

Question. Abhishek is walking from point S to point P as shown in the figure

Which one of the following shows the correct order of the length of Abhishek's shadows from the longest to the shortest when he walks from point S to point P?
A. S, P, Q, R
B. P, S, R, Q
C. P, Q, R, S
D. S, Q, P, R
Answer : A

Question. Read the given statements and select the correct option.
Statement 1 : When we see the trees near the track from a moving train, they appear to be moving.
Statement 2 : The position of a tree near the track with respect to a moving train changes.
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. Statement 1 is false and statement 2 is true.
Answer : A

Question. A plotting compass is moved slowly towards the metal bar P along the path shown in the figure.

What can you conclude about the metal bar P from the given figure?
A. Bar P is a magnetic material.
B. Bar P is a magnet.
C. Bar P is a non-magnetic material.
D. Bar P is either a magnet or a magnetic material.
Answer : B

Question. Nidhi has two bulbs connected across two cells in a simple circuit as shown. How can she make the bulbs glow dimmer?

A. Replace one cell with a piece of chalk.
B. Replace one cell with a piece of wire.
C. Replace one bulb with a piece of wire.
D. Replace one bulb with another cell.
Answer : B

Question. A lunar eclipse occurs
A. When the earth comes between the sun and the moon
B. When shadow of the moon falls on the earth
C. When the moon is waxing
D. On any night.
Answer : A

Question. Which of the following forces are able to act from a distance?
I. Frictional force II. Gravitational force
III. Magnetic force IV. Electric force
A. I and IV only
B. II and III only
C. I, II and III only
D. II, III and IV only
Answer : D

Question. Observe the given diagram.

If both containers are made of the same material with the same thickness and volume then which of the following options about the heat in the water of the two containers is true?
A. Heat in water of container I > Heat in water of container II
B. Heat in water of container I < Heat in water of container II
C. Heat in water of container I = Heat in water of container II
D. None of these
Answer : A

Question. Mohit created a temporary magnet using the stroking method. Which of the following options shows the correct poles of his new magnet when it is stroked in the direction indicated?

Answer : D

Question. Study the given table carefully.

On the basis of the conversion of electrical energy, in which group would you put the electric iron?
A. Group W
B. Group X
C. Group Y
D. Group Z
Answer : C

Question. The given flow chart was prepared by Sakshi for sorting materials into different groups. Fill in the blanks by selecting an appropriate option.

Answer : D

Question. Rashu deliberately mixed rice, all pins, biscuits, pebbles and powdered sugar into a bowl in equal proportions and gave the mixture to her brother Kunal. She asked him to separate each component of the mixture without using water. Select the correct sequence of the methods of separation that you think Kunal should use.
A. Sieving, threshing and then handpicking
B. Magnetic separation, handpicking, filtration and then sieving
C. Handpicking, centrifugation and then winnowing
D. Handpicking, magnetic separation and then sieving
Answer : D

Question. Hitesh has classified some common items based on their properties as shown in the table :

Which of the given items are not correctly classified?

A. II and III only
B. I and IV only
C. II, IV and V only
D. None of these
Answer : C

Question. Study the given Venn diagram carefully.

The centre point X represents
A. Burning of paper
B. Dissolving salt in water
C. Boiling of an egg
D. Bursting of a balloon.
Answer : C

Question. The solubility of substance 'X' in water is 20 g/100 mL which means that maximum 20 g of 'X' can be dissolved in 100 mL of water to form a solution. Observe the given figure carefully.

Which of the following statements is incorrect?
A. No more 'X' can be dissolved in beaker (Q).
B. In beaker (P), 10 g of 'X' will remain undissolved.
C. In beaker (P), the entire amount of 'X' taken can be dissolved on heating and after adding more water.
D. In beaker (Q), 15 g of 'X' gets dissolved completely and forms a clear solution.
Answer : A

Question. Observe the given heating curve of ice carefully and select the correct statement(s) about it.

(i) Point p is the freezing point of water.
(ii) Between the points q and r water exists in liquid state.
(iii) After point s, water vapours condense back to liquid water on further increasing the temperature.
(iv) Point r is the boiling point of water.
A. (ii) and (iii) only
B. (iii) only
C. (i) and (iv) only
D. (i), (ii) and (iv) only
Answer : D

Question. Read the given statements and select the correct option.
Statement 1 : Handles of cooking utensils are made of metals like copper, aluminium or iron.
Statement 2 : Metals are bad conductors of heat.
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. Both statements 1 and 2 are false
Answer : D

Question. Match column I with column II and select the correct option from the given codes.
    Column I                                         Column II
P. Milk                                 (i) Has definite shape and volume
Q. Air                                  (ii) Undergoes sublimation
R. Ammonium chloride      (iii) Has definite volume
S. Brick                              (iv) Homogeneous mixture
A. P-(iii); Q- (iv); R-(i), (ii); S-(i)
B. P- (iii); Q- (ii); R-(i); S-(iv)
C. P-(i); Q-(ii), (iii); R-(iv); S-(ii)
D. P- (iv); Q-(i), (iii); R-(iii); S-(ii)
Answer : A

Question. Saransh made the following flow chart on the blackboard and asked his friend to identify objects P to S.

P, Q, R and S are respectively
A. Rubber ball, flour dough, glass and steel plate
B. Flour dough, steel plate, glass and rubber ball
C. Glass, rubber ball, flour dough and steel plate
D. Rubber ball, flour dough, steel plate and glass.
Answer : D

Question. Two friends Varun and Sujal visited a general physician for their respective diseases. Doctor examined them and prepared a chart as shown to keep a record of their illness.

Refer to the given chart and select the correct option.
A. Varun is suffering from deficiency of a water soluble vitamin which is essential for proper functioning of digestive and nervous system.
B. Sujal is suffering from carbohydrate and fat deficiency disease.
C. Varun is suffering from deficiency of a fat soluble vitamin which can be synthesised by our body in the presence of sunlight and helps to absorb calcium.
D. Sujal is suffering from deficiency of a mineral which is required for the formation of haemoglobin
Answer : C

Question. Hansika categorised plants on the basis of their parts that are generally eaten. She made four groups of three plants each. By mistake she placed one wrong member in each group. Identify the wrong member of each group and select the correct option.
Group I : Asparagus, Ginger, Radish
Group II : Cumin, Fennel, Cinnamon
Group III : Cauliflower, Broccoli, Lettuce
Group IV : Carrot, Turnip, Potato
A. Radish of group I should be interchanged with potato of group IV.
B. Cinnamon of group II should be replaced with Tapioca.
C. Lettuce of group III should be replaced with coriander.
D. Broccoli of group III should be interchanged with turnip of group IV.
Answer : A

Question. Refer to the given figure and select the correct option

A. When solution of copper sulphate and caustic soda are added in test tubes P and Q and shaken, the colour of solution in test tube P will change into blue-black whereas in Q it will change into purple.
B. When iodine solution is added into test tubes P and Q, the colour of solution in test tube P will remain unchanged whereas in Q it will change into blue-black.
C. When Benedict’s solution is added into test tubes P and Q and heated, the colour of solution in test tube Q will remain unchanged whereas in P it will change into reddish orange.
D. Both B and C
Answer : B

Question. Ruchir took four equal sized containers P, Q, R and S containing equal amounts of water and dipped four different equal sized fabrics
in them. After five minutes, he took out all the fabrics from the containers. The given graph shows the amount of water remaining in each container.

Select the correct statement regarding the given graph.
A. Fabric dipped in Q has base fibre cellulose whereas fabric dipped in S has base fibre petroleum.
B. Fabric dipped in P could be made of chemicals whereas fabric dipped in S could be made of cellulose.
C. Fabrics dipped in S and R may be obtained from mammal and insect, respectively.
D. Fabric dipped in P is used for making raincoat whereas fabric dipped in R is used as winter clothing.
Answer : C

Question. Refer to the given table.

Select the option which correctly identifies P–S.
A. P – Flippers; Q – Desert;
R – Rainforest; S – Blowholes
B. P – Armoured shell; Q – Desert;
R – Boreal forest; S – Gills
C. P – Concentrated urine; Q – Desert;
R – Boreal forest; S – Blowholes
D. P – Blubber; Q – Boreal forest;
R – Rainforest; S – Lungs
Answer : C

Question. Select the incorrect match.

A. (iii) and (v) only
B. (ii), (iii) and (iv) only
C. (i), (iii) and (v) only
D. (ii) and (v) only
Answer : A

Question. Refer to the given food web and select the correct option regarding it.

A. There are two producers and two top carnivores in this food web.
B. There are three herbivores, four carnivores and one omnivore in this food web.
C. Snake feeds on three different species in this food web whereas hawk feeds on two different species.
D. Bird acts both as primary consumer and secondary consumer in this food web.
Answer : B

Question. Refer to the given Venn diagram and select the correct option regarding animals P, Q and R.

A. P and R could regulate internal body temperature.
B. P could be toucan, Q could be capybara whereas R could be walrus.
C. P could be an animal with aquatic adaptations whereas Q could be an animal with aerial adaptations.
D. Endoskeleton is absent in P and Q whereas it is present in R comprising of hollow bones.
Answer : A

Question. The gas X is only about 20 parts out of 100 parts of air in the atmosphere. It is needed for decomposition of organic matter. The gas X is
A. Carbon dioxide
B. Water vapour
C. Oxygen
D. Nitrogen.
Answer : C

Question. Refer to the given paragraph.
The yarn produced from fibres can be converted into fabric by processes X and Y. In process X, two sets of yarns are arranged together whereas in process Y single yarn is used.
Identify processes X and Y and select the correct statement regarding them.
A. Process X could be done by handlooms whereas process Y could be done by powerlooms.
B. Takli and charkha could be used for process Y.
C. X could be spinning whereas process Y could be weaving.
D. None of these
Answer : D

Question. Which of the following statements is/are incorrect?
(i) Fats deposited in our body act as shock absorbers and protect us from injury.
(ii) Kwashiorkor is caused by deficiency of proteins, carbohydrates and fats.
(iii) Roughage neither releases energy nor helps in tissue or body building.
(iv) Starch containing food item turns bluish black in colour on undergoing iodine test.
A. (i) and (ii) only
B. (ii) only
C. (iii) only
D. (ii) and (iv) only
Answer : B

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

Answer : B

Question. Refer to the given set-ups (i-iv) and select the correct option regarding them.

A. Balloons of set-ups (ii) and (iii) will inflate due to expansion of air.
B. Balloon of set-up (iv) will deflate due to expansion of air.
C. Balloon of set-up (i) will inflate due to expansion of air.
D. Balloon of set-up (i) will deflate due to contraction of air whereas balloons of set-ups (ii), (iii) and (iv) will inflate due to expansion of air.
Answer : C

Question. Refer to the given characteristics of three plants regarding their adaptations for seed dispersal.
Plant X - Its fruits are small, hooked and spiny.
Plant Y - Its fruits have spongy and fibrous outer coat with floating ability.
Plant Z - Its fruits are small, light weight and winged.
Select the correct option regarding X, Y and Z.
A. Seeds of plant X and Y are dispersed through abiotic agency whereas seeds of plant Z are dispersed through biotic agency.
B. If all animals are removed from the community where plant X grows then the seeds will not be dispersed effectively.
C. Seeds of plant Y are dispersed far off from the parent plant whereas seeds of plant Z are dispersed in a very small radius around parent plant.
D. Seeds of plant X are dispersed by water, seeds of plant Y are dispersed by explosion and seeds of plant Z are dispersed by animals.
Answer : B

Question. Refer to the given flow chart.

Select the incorrect statement regarding P-S.
A. S may breathe through spiracles whereas R breathes through lungs.
B. P could possess body covering of hair whereas Q could possess body covering of scales.
C. S could be a cold blooded animal whereas R could be warm blooded animal.
D. None of these
Answer : D

Question. Refer to the given table regarding different types of waste and identify P, Q, R and S.

Answer : C

ACHIEVERS SECTION

Question. Read the given passage and fill in the blanks by selecting an appropriate option.
Change in temperature and pressure plays a very important role in changing the state of matter. A gas gets liquefied with (i) and (ii) while camphor undergoes sublimation with (iii) and (iv)

Answer : C

Question. Refer to the given dichotomous key and select the correct option regarding them.
I. (a) It is a flowering plant. -Go to II
(b) It is a non-flowering plant. - P
II. (a) It possesses reticulate venation. -Go to III
(b) It possesses parallel venation. -Go to IV
III. (a) It stores food in its root. - Q
(b) It stores food in its stem. - R
IV. (a) It stores food in its leaf. - S
(b) It stores food in its seed. - T
A. P could be Azolla whereas R could be onion.
B. Q could be carrot whereas T could be maize.
C. S could be mustard whereas T could be gram.
D. Q could be radish whereas S could be coriander.
Answer : B

Question. The figure shows two iron nails X and Y hanging from a magnet. Which of the following statements is incorrect?

A. Top of nail Y is north pole and bottom of nail Y is south pole.
B. Top of nail X is north pole and bottom of nail X is south pole.
C. Magnetic properties are induced into both the nails X and Y.
D. Magnetic properties are induced into the nail X only.
Answer : D

Question. Read the given passage where few words have been italicised.
Jute is a summer season crop and grows best in alluvial soil. Jute plants are harvested before flowering. After harvesting the stalks of plants are tied into bundles and soaked in alkali for few days. This leads to softening of tissues so that fibres get easily separated. The process is called ginning. The fibres are then washed in water and hung up to dry.
Select the correct option regarding this.
A. Summer should be replaced by winter and alluvial should not be replaced as it is correctly mentioned.
B. Before should be replaced by after and ginning should be replaced by retting.
C. Positions of alkali and water should be interchanged.
D. None of these
Answer : B

Question. Shivani took three equal sized similar glasses X, Y and Z and filled each of them with 20 mL of water. She left glass X in the sun and covered it with plate, placed glass Y in shade and placed glass Z in the sun.
Which of the given graphs correctly represents change in amount of water in glasses X, Y and Z with time?

Answer : A