CBSE Class 6 Science NSO Olympiad MCQs with Answers Set L

MENTAL ABILITY

Question. What is the smallest number of squares that must be added so that the line MN becomes a line of symmetry?

(A) 4
(B) 5
(C) 6
(D) 7
Answer : C

Question. I am a number between 20 and 30. If you divide 47 and 92 by me, the remainders are 3 and 4, respectively. What number am I?
(A) 21
(B) 23
(C) 22
(D) 24
Answer : C

Question. 378 Indian stamps and 588 foreign stamps were pasted in an album in such a way that each page had either Indian or foreign stamps on it. What is the maximum number of stamps that were pasted on each page if the number of stamps were the same on each page?
(A) 1874
(B) 6048
(C) 21
(D) 42
Answer : D

Question. Which of the following solids is made up of the greatest number of unit cubes?

Answer : C

Question. Anusha and Priya were given some candies in the ratio 4 : 7. Priya ate 9 candies, she still had 15 candies more than Anusha. How many candies did Anusha have?
(A) 30
(B) 32
(C) 41
(D) 15
Answer : B

Question. Which of the following solids has the greatest number of faces?

Answer : A

Question. A rope is 82.03 m long. John cut off 3.28 m. Then, he cut the remaining rope into 100 pieces of equal length. What is the length of each piece?
(A) 0.07875 cm
(B) 0.7875 cm
(C) 7.875 cm
(D) 78.75 cm
Answer : B

Question. How many angles in the given figure are less than 90° ?

(A) 11
(B) 12
(C) 13
(D) 14
Answer : D

Question. A set of numbers is given below :
358 426 853 674 592
If 1 is subtracted from the middle digit of each number and then the numbers are arranged in descending order, what will be the sum of the digits of the newly formed second number?
(A) 16
(B) 15
(C) 11
(D) 12
Answer : A

Question. The bar graph shows the number of stamps collected by four boys. Who has 15/62 of the total number of stamps collected by the four boys?

(A) Arjun
(B) Kartik
(C) Mohit
(D) Raj
Answer : C

Question. Pointing to a woman in a photograph, a man says, "She is the mother-in-law of the husband of the only grand-daughter of my own mother-in-law". How is the woman related to the man?
(A) Daughter
(B) Wife
(C) Sister-in-law
(D) Niece
Answer : B

Question. How many sad faces will there be in Pattern 99 ?

(A) 300
(B) 191
(C) 980
(D) 120
Answer : A

Question. The big rectangle is divided into four parts. P is a square. The area of Q is thrice that of P. The area of R is 42 cm² more than the area of Q. What is the perimeter of the big rectangle?

(A) 90 cm
(B) 76 cm
(C) 80 cm
(D) 88 cm
Answer : D

Question. Replace * by the given options to make the statement true.
(– 6) + (– 9) – (– 12) – 12 + 8 – 3 * (– 6) – (–9) – (– 12) + 12 – 8 + 3
(A) >
(B) <
(C) =
(D) Can't be determined
Answer : B

Question. A dog jumps 4 times during the time when a hare jumps 5 times. But the distance covered by the dog in 3 jumps is equal to that covered by the hare in 4 jumps. What is the ratio of the speeds of the hare and the dog ?
(A) 5 : 3
(B) 15 : 16
(C) 4 : 5
(D) 12 : 18
Answer : B

SCIENCE

Question. Light rays undergo regular reflection at ________.
(A) A piece of cloth
(B) The Moon surface
(C) A whitewashed wall
(D) The calm surface of a lake
Answer : D

Question. Which of the following statements about the circuit is correct?

(A) Lamp L1 will light up when either L2 or L3 are lighted.
(B) Electricity will flow only when all the switches are closed.
(C) Current flowing through L1 and L2 are equal.
(D) Electricity will flow as long as any one switch is closed.
Answer : A

Question. Study the diagram. Raj is standing in front of the plane mirror. What is the minimum height of the mirror so that he can see himself completely in the mirror?

(A) x m
(B) Half of x m
(C) More than x m
(D) Can’t say
Answer : B

Question. Two boys played ‘tug-of-war’ on movable planks. When the two boys started pulling, they moved the same distance backwards. What is the likely reason that caused them to move the same distance backwards?

(A) Boy P applied a greater amount of force than Boy Q.
(B) The two boys applied the same amount of force on the rope.
(C) The gravitational force pulled the two boys down to the ground.
(D) The frictional force between the two boys and their movable planks stopped them from moving.
Answer : B

Question. A piece of steel can be magnetised by stroking it with a magnet.
When the magnet is moved in the direction shown, which poles are produced at X and at Y ?

        X                Y
(A) North         North
(B) North         South
(C) South        North
(D) South        South
Answer : B

Question. The passengers sitting in a flying aeroplane are in ____ with respect to clouds, but are in ____ with respect to the interior of the aeroplane.
(A) Rest, motion
(B) Rest, rest
(C) Motion, rest
(D) Motion, motion
Answer : C

Question. The earth wire of an electric appliance should be connected to the ________.
(A) Fuse
(B) Metal case
(C) On/Off switch
(D) Plastic handle
Answer : A

Question. An iron bar is placed near a magnet as shown.
Which diagram correctly shows the induced magnetisation of the iron bar?

Answer : C

Question. An example of rotational motion is ______.
(A) The moon revolving around the Earth
(B) Rotation of the Earth
(C) A child in merry-go-round
(D) The bob of a swinging pendulum
Answer : B

Question. Suppose the Earth begins to rotate twice as fast. Which of these would happen in this condition?
(A) Days would be twice as long.
(B) The Sun would rise and set in the east.
(C) Days would be half as long.
(D) Some places would have eight seasons in a year.
Answer : C

Question. Arjun was given a saturated solution of sugar. He was asked to dissolve two more spoons of sugar into the saturated solution. His four friends suggested him to do the following before adding more sugar.
(I) Stirr the solution for longer time (II) Divide the solution into two separate glasses
(III) Add more water to the solution (IV) Heat the solution
Which of his friend's suggestion(s) will help him in dissolving more sugar?
(A) I and II
(B) II and III
(C) III and IV
(D) IV only
Answer : C

Question. Shopkeepers store eatables in X containers so that buyers can easily see them while some other materials are stored in metal containers Y. Identify X and Y respectively.
(A) Transparent, transparent
(B) Opaque, opaque
(C) Transparent, opaque
(D) Opaque, transparent
Answer : C

Question. Match the columns and choose the correct option.
     Column-I (Mixtures)                     Column-II (Separation Techniques)
(P) Oil and water                                                   (I) Winnowing
(Q) Soil and water                                                (II) Evaporation
(R) Salt and water                                               (III) Decantation
(S) Powdered leaves and sand                           (IV) Filtration
(A) (P)-(IV), (Q)-(I), (R)-(III), (S)-(II)
(B) (P)-(II), (Q)-(I), (R)-(IV), (S)-(III)
(C) (P)-(III), (Q)-(IV), (R)-(II), (S)-(I)
(D) (P)-(IV), (Q)-(II), (R)-(I), (S)-(III)
Answer : C

Question. Rishab came back home after a few days. He observed the following :
(P) Juice in bottle kept in refrigerator was freezed.
(Q) The food kept in kitchen was spoiled.
Which of the following is true for P and Q?
(A) P and Q are physical changes.
(B) P and Q are chemical changes.
(C) P is a physical change and Q is a chemical change.
(D) P is a chemical change and Q is a physical change.
Answer : C

Question. Study the given flowchart carefully and identify the material S.

(A) Wood
(B) Notebook
(C) Glass
(D) Iron rod
Answer : D

Question. Geeta set up an experiment as shown below to find out how much light can pass through different materials.

She placed four materials K, L, M and N, one at a time at position X. She then recorded the intensity of light detected by the light sensor in the table below.

Which material should she use if she wants to make curtains for her bedroom to keep out the sunlight?
(A) K
(B) L
(C) M
(D) N
Answer : C

Question. Vidhi has three beakers, X, Y and Z with equal amount of water at different temperatures. She dissolved equal amount of sugar in all the beakers. After 5 minutes of stirring, she filtered the solutions to remove the undissolved sugar. She obtained 0.5 g sugar from X, 1.8 g sugar from Y and 1.2 g of sugar from Z. Which of the three beakers has water at the highest temperature?
(A) X
(B) Y
(C) Z
(D) Both X and Y
Answer : A

Question. The two beakers, X and Y were left on the table. After 10 minutes, what will you observe?

(A) Water droplets are formed inside the beaker X and outside the beaker Y.
(B) Water droplets are formed outside the beaker X and inside the beaker Y.
(C) Water droplets are formed only on beaker X.
(D) Water droplets are formed only on beaker Y.
Answer : A

Question. Study the following table. Identify the change(s) listed under the wrong heading

(A) 2 and 3
(B) 2 and 5
(C) 2
(D) 5
Answer : D

Question. The given figure shows two different types of root system i.e., X and Y. Which of the following options is correct regarding them?

(A) Younger sidewards roots of these root systems are called lateral roots.
(B) The Y type of root system provides greater anchorage to the plant.
(C) Mostly plants showing reticulate venation possess X type of root system. 
(D) The food storing root of turnip is a modification of Y type of root system.
Answer : C

Question. Refer the given figure of a typical flowering plant and select the option that correctly fills the blank in following statement.

We may not be able to see new plants of the same type if the part labelled ______ is removed.
(A) W
(B) X
(C) Y
(D) Z
Answer : A

Question. The given table shows the degree of angular movement shown by three different skeletal joints X, Y and Z.
Which of the following statements is correct regarding this?

(A) Joint X can be the joint between shoulder bone and arm.
(B) Joint Y can be the elbow joint.
(C) Joint Z can be the joint between upper jaw and rest of the skull.
(D) All of these
Answer : D

Question. Animals that undergo hibernation in winters get energy by utilizing _____ stored in their bodies.
(A) Fats
(B) Carbohydrates
(C) Proteins
(D) Both (A) and (B)
Answer : A

Question. Which of the following is incorrect regarding skeletal support system of different organisms?
(A) Earthworms have liquid skeleton where liquid filled spaces inside body serve as support system.
(B) Skeletal muscles work in pairs, when one muscle of a pair contracts, the other relaxes.
(C) Snakes and other limbless animals have bristles on body's under surface that support movement.
(D) The birds have hollow bones with air filled cavities that assist in flying.
Answer : C

Question. Surabhi was comparing plant Q with a typical flowering plant shown in figure. She made the following observations about plant Q.

1. Part X is swollen, fleshy and green.
2. Watery material squeezes out when part X is broken.
3. Part W shows a great reduction in size.
4. Part Y penetrates to deep levels in soil.
These observations suggest that plant Q is most likely to be found in
(A) Plains along a river
(B) Ponds
(C) Evergreen forests
(D) Deserts
Answer : D

Question. Aquatic habitats (freshwater or marine) sustain various organisms including mammals, amphibians, etc., each with different kinds of adaptations. Which of the following is incorrect regarding these adaptations?
(A) Blowholes and lungs are the respiratory organs of many aquatic mammals.
(B) Dorsoventrally flattened body is found in many deep sea fishes in order to cope with high pressure.
(C) Many aquatic animals either have streamlined bodies or make their bodies streamlined while swimming.
(D) Gills are the organs of respiration in essentially all fishes.
Answer : D

Question. The given pie chart shows relative amount of three main gases (X, Y and Z) in the air. Which of the following statements is correct regarding this? 

(A) X is a major component of most of the fertilizers.
(B) Y is the gas that is used in photosynthesis.
(C) Z represents the gas that is used in respiration of plants.
(D) X and Y do not dissolve in water.
Answer : A

Question. Read the given statements and select the correct option.
Statement 1 : Weaving and knitting are two different processes of cloth making.
Statement 2 : Weaving involves the use of a single yarn while knitting involves use of two sets of yarn.
(A) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
(B) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is correct but statement 2 is incorrect.
(D) Both statements 1 and 2 are incorrect.
Answer : C

Question. A person living in a humid region like equatorial regions would prefer to use clothes made up of _______.
(A) Nylon as it is stronger, light and does not wrinkle.
(B) Wool as it is fluffy and soft.
(C) Jute as it has a good power of absorption.
(D) Cotton as it allows moisture to go through it.
Answer : D

Question. Which of the following is an incorrect match of the articles and the fibres used in their production?
(A) Mountain climbing ropes – Nylon
(B) Blankets – Wool
(C) Banknotes and high quality paper – Cotton
(D) None of these
Answer : D

Question. Aditya was testing a food sample X as shown in the given figure.

Which of the following statements is correct regarding this?
(A) X can be boiled egg if the sample turned blue-black.
(B) X can be raw meat if the sample did not change colour.
(C) X can be raw potato slices if the sample turned blue-black.
(D) Both (B) and (C)
Answer : D

Question. Select the option which on reshuffling gives the name of the food component that does not provide nutrients but aids in digestion.
(A) umcacil
(B) egouarhg
(C) setaegelbv
(D) roptiesn
Answer : B

Question. Match Column-I with Column-II in context of the given figure and select the correct option from the codes given below

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

Question. The given Venn diagram represents some plants (P, Q, R and S) based on their edible parts.

Select the option which most correctly defines their position inthe chart.
(A) P-Mustard, R-Fenugreek
(B) P-Rice, Q-Apple
(C) S-Fenugreek, Q-Tomato
(D) P-Spinach, S-Coriander
Answer : C

Question. Read the given statements and select the correct option.
Statement 1 : Biodegradable wastes are also known as organic wastes.
Statement 2 : The origin of biodegradable wastes are living organisms.
(A) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
(B) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is correct but statement 2 is incorrect.
(D) Both statements 1 and 2 are incorrect.
Answer : A