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NSO - Mock Test - 8

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NSO - Mock Test - 8
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  • Question 1
    1.2 / -0
    A person starts moving towards south. After walking 20 m, he turns to his right and walks 25 m. Further, he turns to his left and walks 20 m again. Finally, he moves to his left and walks 25 m. How far is he now from the starting point?
    Solution
    S = Start point, and E = End point



    The person is 40 metres far from the starting point.
  • Question 2
    1.2 / -0
    A and B are siblings. E is the wife of F. D is the son of E. If B is the daughter of F, then how is B related to D?
    Solution
    A and B are siblings.
    E is the wife of F.
    D is the son of E.
    If B is the daughter of F, it means B is the daughter of E also.
    So, B is the sister of D.
  • Question 3
    1.2 / -0
    Complete the following series.

    1, 16, 81, 256, ?
    Solution
    The series is as follows:
    14 = 1
    24 = 16
    34 = 81
    44 = 256
    54 = 625
  • Question 4
    1.2 / -0
    Find the missing portion of the following figure.

    Solution
    The whole image is as follows:-

  • Question 5
    1.2 / -0
    Find the mirror image of the following picture.

    Solution
    The mirror image is as follows:-

  • Question 6
    1.2 / -0
    In a certain code, "BRAKE" is written as "ASZLD". How will "STONE" be written in that code?
    Solution
    The code is as follows:
    B – 1 = A
    R + 1 = S
    A – 1 = Z
    K + 1 = L
    E – 1 = D
    So, in the same way, STONE will be written as:
    S – 1 = R
    T + 1 = U
    O – 1 = N
    N + 1 = O
    E – 1 = D
  • Question 7
    1.2 / -0
    Find the missing term in the following analogy.

    MNO : PRT : : STU : ?
    Solution
    The relation is as follows:-
    M + 3 = P
    N + 4 = R
    O + 5 = T
    In the same way,
    S + 3 = V
    T + 4 = X
    U + 5 = Z
  • Question 8
    1.2 / -0
    Find the water image of the following picture:

    Solution
    The water image will be as shown below:

  • Question 9
    1.2 / -0
    Find the odd one out.

    441, 529, 729, 841, 969
    Solution
    Except 969, all the other numbers are perfect squares.
    212 = 441
    232 = 529
    272 = 729
    292 = 841
  • Question 10
    1.2 / -0
    If green is blue, black is red, yellow is white and purple is orange, then what are the colours of grass and mango?
    Solution
    According to the question,
    Green = Blue
    Black = Red
    White = Yellow
    Purple = Orange
    The colour of grass is green, and of mango is yellow. So, the correct answer is blue and white.
  • Question 11
    1.2 / -0
    Which of the following terms represents the art of growing fruits, vegetables and ornamental plants?
    Solution
    Horticulture is the art of growing fruits, vegetables and ornamental plants.
  • Question 12
    1.2 / -0
    Which of the following micro-organisms helps in nitrogen fixation?
    Solution
    Bacteria are used for nitrogen fixation. Some of the soil bacteria, like azotobacter, clostridium and symbiotic bacteria, are capable of fixing free atmospheric nitrogen into nitrates. These nitrates are used by green plants to produce proteins.
  • Question 13
    1.2 / -0
    Given below are some properties of metals. Select the option which shows the correct group of properties.

    (i) All metals are solid at room temperature.
    (ii) Sodium and potassium are soft metals.
    (iii) Metals have a brilliant shine which is referred to as the metallic lustre.
    (iv) Metals are brittle.
    (v) Metals can be drawn into very thin wires.
    (vi) Iodine is a lustrous metal.
    Solution
    All the metals are solid at room temperature except mercury which is a liquid.
    Sodium and potassium are metals and are soft like wax.
    Metals have a brilliant shine, which is referred to as the metallic lustre.
    Metals are not brittle. They are malleable and flatten into thin sheets when hammered or subjected to pressure.
    Metals are ductile and can be drawn into very thin wires.
    Although Iodine has a metallic lusture, it is essentially a non-metal.
    Hence, (ii), (iii) and (v) are the correct.
    The statements (i), (iv) and (vi) are incorrect.
  • Question 14
    1.2 / -0
    Which of the following statement is incorrect?
    Solution
    According to first law of motion if no force is applied then the body will continue its motion hence it will not stop,therefore 2nd option is correct.
  • Question 15
    1.2 / -0
    Which of the following metals is not a good conductor of electricity?
    Solution
    Copper, aluminium and silver are very good conductors of electricity, whereas, tungsten has a high resistivity. So, it is not a good conductor of electricity. When current passes through the tungsten filament in an electric bulb it gets heated and glows producing light.
    Hence, option (2) is correct.
  • Question 16
    1.2 / -0
    Observe the given pictures of fuels and select the incorrect statement(s) regarding the fuels A, B, C and D.


    I. A undergoes rapid combustion.
    II. B is a fuel from animal fossils.
    III. C is the cleanest automobile fuel.
    IV. D is a fossil fuel.
    Solution
    A is LPG, B is Coal, C is petrol and D is a nuclear fuel.
    LPG undergoes rapid combustion. Hence, statement I is correct.
    Fossil fuels were formed in the geological past from the remains of living organisms. Coal, petroleum, natural gas etc. are fossil fuels. Coal is formed from the wood of trees which got buried beneath the earth's crust during natural calamities. It is a fuel formed from plant fossils. Hence, statement II is incorrect.
    CNG is a cleaner fuel as compared to petrol and is replacing it as an automobile fuel. Hence, statement III is incorrect.
    Radioactive substances are used as nuclear fuels, which have an application in nuclear power plants, where they produce heat energy to run the turbines. Nuclear fuel is not a fossil fuel. Hence, statement IV is incorrect.
    Therefore, option (4) is correct.
  • Question 17
    1.2 / -0
    Which of the following substances is combustible?
    Solution
    A substance that burns on subjection to heat is combustible.
    Magnesium ribbon is a combustible substance and burns with a dazzling white light to form Magnesium oxide.

    All the other listed substances are incombustible.
  • Question 18
    1.2 / -0
    Read the statements given below:
    (i) Manure increases the water holding capacity of the soil.
    (ii) Manure provides a lot of humus to the soil.
    (iii) Manure is prepared in factories.
    (iv) Manure is a man made inorganic salt.

    Which of the given statements are true?
    Solution
    Statements (iii) and (iv) are incorrect. Manure is a natural substance obtained by the decomposition of cattle dung and plant residues. Manure can be prepared in the fields.
  • Question 19
    1.2 / -0
    Which of the following has both unicellular and multicellular forms?
    Solution
    Single-celled organisms are called unicellular organisms. Such organisms include yeast, euglena, amoeba etc. Many algae are single celled, however some species are multicellular. Many, but not all of red and brown algae are multicellular.
  • Question 20
    1.2 / -0
    Which of the following methods is used to reduce the friction in racing cars and aeroplanes?
    Solution
    Shapes of racing cars and aeroplanes are designed to reduce the friction. This is called streamlining.
  • Question 21
    1.2 / -0
    Which of the following properties of wave is not related to other three?
    Solution
    Wave length × Frequency = Speed
    Amplitude is not related to any of these.
  • Question 22
    1.2 / -0
    In which of the following options does the applied force cause a change in the shape of an object?

    (a) Squeezing of a plastic bottle
    (b) Pressing clay between hands
    (c) A drawer is pulled to open it
    Solution
    Both, squeezing of a plastic bottle, and pressing clay between the hands changes the shape of objects.
  • Question 23
    1.2 / -0
    What is the study of earthquakes called?
    Solution
    Study of earthquakes is called seismology.
  • Question 24
    1.2 / -0
    What is the size of one light year?
    Solution
    A light year is the distance travelled by light in one year. The speed of light is 300,000 km/s.Therefore, one light year is about 9.5 million kilometres.
  • Question 25
    1.2 / -0
    What was the name of the first Earth satellite sent by India into the space?
    Solution
    India sent its first Earth satellite Aryabhatta on 19th April, 1975.
  • Question 26
    1.2 / -0
    Excessive growth of algae in the water bodies is called
    Solution
    Excessive growth of algae in the water bodies is called eutrophication.

    Eutrophication is the natural ageing of a lake by nutrient enrichment of its water. In a young lake, the water is cold and clear, supporting little life. With time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus, which encourage the growth of aquatic organisms. As the lake's fertility increases, plant and animal lives burgeon, and organic remains begin to be deposited on the lake bottom. Over the centuries, as silt and organic debris pile up, the lake grows shallower and warmer, with warm-water organisms supplanting those that thrive in a cold environment. Marsh plants take root in the shallows and begin to fill in the original lake basin. Eventually, the lake gives way to large masses of floating plants (bog).
  • Question 27
    1.2 / -0
    What does our body produce to fight the invader when a disease-carrying microbe enters into it?
    Solution
    Our body produces antibodies to fight the invader when a disease-carrying microbe enters into it.
  • Question 28
    1.2 / -0
    Refer to the diagram given below.



    The correct identification of X is:
    Solution
    The correct identification is:

  • Question 29
    1.2 / -0
    Which of the following fibres has the maximum tensile strength?
    Solution
    The tensile strength of a material is the maximum amount of tensile stress that it can take before breaking or snapping under the effect of the applied force.
    Nylon has the maximum tensile strength which is greater than even a steel wire.
  • Question 30
    1.2 / -0
    Which of the following forces exists only if the interacting particles are protons or neutrons or both?
    Solution
    A nuclear force is a force that exists only if the interacting particles are protons or neutrons or both.
  • Question 31
    1.2 / -0
    What is mixed with graphite to form the pencil lead?
    Solution
    Graphite is mixed with fine clay and made into dough, from which spaghetti like strings are drawn. These strings are termed as pencil lead and the pencil as lead pencil.
  • Question 32
    1.2 / -0
    Which of the following substances is not obtained during the destructive distillation of coal?
    Solution
    Coke, coal tar and coal gas are products of destructive distillation of coal whereas lubricating oil is produced during fractional distillation of petroleum.
    Hence, option (4) is correct.
  • Question 33
    1.2 / -0
    In an activity to study the zones of the candle flame, the students were instructed as follows:

    (i) Light the candle.
    (ii) Hold a glass tube with a pair of tongs and introduce its one end in the dark zone of a non-flickering candle flame.
    (iii) Bring a lighted match near the other end of the glass tube.

    Observation: A flame is formed at the open end of the glass tube.

    Which of the following is the correct reason for the observation?



    Solution
    No combustion takes place in the dark zone due to non availability of oxygen and it contains unburnt wax vapour. This vapour coming out at the other end of the glass tube burns in the presence of oxygen when subjected to flame.
    Hence, option (3) is the correct answer.
  • Question 34
    1.2 / -0
    Refer to the diagram given below.



    Choose the option that gives the correct term and example regarding A, B and C.
    Solution
    The correct terms for A, B and C are:
    A - Extinct
    B - Endangered
    C - Endemic
    Option A is correct as Dodo is an extinct species. Dinosaurs and Woolly Mammoth are also extinct species.
  • Question 35
    1.2 / -0
    The cell wall of bacteria is made up of:
    Solution
    Peptidoglycan (murein) is a polymer consisting of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria, forming the cell wall.
  • Question 36
    1.2 / -0
    Why is it easier to catch a tennis ball as compared to a cricket ball even if both are dropped from the same height?
    Solution
    Catching a ball with a higher velocity is more difficult as compared to catching a ball which is moving with low velocity. We see that moving bodies possess a physical quantity associated with their motion which determines how much force is required to bring them to rest. This quantity depends on the mass and velocity of the moving body, which is called 'momentum'. So, lesser the weight of the object, lesser will be its momentum.
  • Question 37
    1.2 / -0
    In which of the following processes does the division of the parent body into two halves take place to produce two daughter cells?
    Solution
    In binary fission, the division of the parent body into two halves takes place to produce two daughter cells. The nucleus and the cytoplasmic contents divide into smaller-sized daughter individuals.
  • Question 38
    1.2 / -0
    Why does sound require a material medium to propagate?
    Solution
    Sound propagates in the form of mechanical waves, so it requires a material medium to propagate.
  • Question 39
    1.2 / -0
    Which of the following devices will act as a source of power in the circuit?
    Solution
    The battery will act as a source of power in the circuit
  • Question 40
    1.2 / -0
    The point of origin of an earthquake inside the earth is called
    Solution
    The focus is the point of origin of an earthquake inside the earth.
  • Question 41
    1.2 / -0
    When light travels from one transparent medium to another, a change in the wavelength of the light occurs. This is due to
    Solution
    When light travels from one transparent medium to another, a change in the wavelength of the light occurs. This is due to change in the optical density considered with reference to the motion of the light in the medium, which is also called refractive index of the medium.
  • Question 42
    1.2 / -0
    Which of the following can be used to explain the origin of the universe?
    Solution
    Astronomers believe that the origin of the universe can be explained by the Big Bang Theory. At the time of the Big Bang, there was a gigantic explosion, which formed atoms, then molecules, then eventually nebulae. All the matter in the universe occupied a singe point till the explosion, after which it began its explosive expansion. The universe is still expanding.
  • Question 43
    1.2 / -0
    The accumulation of harmful chemicals in the body of living organisms is called
    Solution
    The accumulation of harmful chemicals in the body of living organisms is called bio-concentration.
  • Question 44
    1.2 / -0
    Which of the following is a Zaid crop?
    Solution
    Zaid crops are sown in March/April and harvested before rainy season. Most crops are vegetables and fruits like cucurbits, gourd, bitter gourd etc.
  • Question 45
    1.2 / -0
    Refer to the diagram given below and choose the incorrect option regarding the information conveyed in the diagram.

    Solution
    Sex chromosomes of the father determine the sex of an unborn baby. The belief that the mother is responsible for the sex of her baby is completely wrong and to blame her for this is totally unjustified.
  • Question 46
    1.2 / -0
    Refer to the flowchart given below and choose the incorrect statement regarding A, B and C.

    Solution
    The correct identification of cells A, B and C is:
    A - Red blood cells
    B - Nerve cells
    C - Smooth muscle cells
    Nerve cells contain a nucleus present in the cyton of the nerve cell. RBCs lack a nucleus.
  • Question 47
    1.2 / -0
    Study the following table depicting the behaviour of different metals with four different salt solutions.
    The empty slots indicate that behaviour of the metal was not studied with that solution.

    Metals CuSO4 ZnSO4 FeSO4 MgSO4
    Cu No reaction
    Zn Displacement reaction Displacement reaction No reaction
    Fe Displacement reaction
    Mg Displacement reaction Displacement reaction

    The metals in the increasing order of their reactivity are:
    Solution
    Since Zn, Fe, and Mg can displace Cu from its salt solution, copper is the least reactive among the given metals.
    Zn can displace Fe from the salt solution, but not Mg. Hence, Zinc is more reactive than iron but less reactive than magnesium.
    Iron is more reactive than copper but less reactive than zinc.
    Magnesium is the most reactive metal among the listed metals.
    The metals in the increasing order of their reactivity are Cu < Fe < Zn < Mg.
    Therefore, option (4) is correct.
  • Question 48
    1.2 / -0
    In which of the following cases will work be done?

    Solution
    In (A), the box will be displaced towards left because more force is applied on it from the right.
    In (B), there will be no change in the position of the box because same amounts of force are applied on it from both the sides.
    In (C), the box will be displaced towards right because it is pulled from the right with more force.
    In (D), the table will be displaced towards the left because the force is applied on it from the right.
    In (E), there will be no displacement because the force is applied on a wall.
    So, work will be done in (A), (C) and (D) because work is said to be done if there is a change in the position of the object on which force is applied.
  • Question 49
    1.2 / -0
    Following are given different phases of moon. Identify the missing phases of the moon.

    Solution
    When the moon is not visible, it is called new moon. (D)
    Full moon is the phase of the moon in which the whole disc is illuminated. (C)
    The first quarter phase of the moon is when one-half is illuminated by the sun. It occurs when the moon's illumination is decreasing. (A)
    The third quarter moon is when the opposite half of the moon is illuminated as compared to the first quarter. (B)
  • Question 50
    1.2 / -0
    Label the missing parts of the bulb given below.
    Solution
    Construction of a bulb - The filament rests on two tiny wires called supporters and its ends are connected to leads through which electric current passes. The leads and filament supporters are fixed to a glass support and the upper portion is sealed with glass. Above the seal, an aluminium cap is attached and the leads are connected to the top of the cap as two terminals. On the lateral sides of the aluminium cap, two small projections are provided diametrically opposite to each other to help fix the bulb to its holder. As the resistance of the filament is much higher, it gets red hot and then emits light when electricity is passed through it.

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