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NSO - Mock Test - 6

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NSO - Mock Test - 6
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  • Question 1
    1.2 / -0
    If in a certain code "COUNTER" is written as "AMSLRCP", then "GOOGLE" will be written as
    Solution
    The code is obtained by going two letters back in the original word.

    C – 2 = A
    O – 2 = M
    U – 2 = S
    N – 2 = L
    T – 2 = R
    E – 2 = C
    R – 2 = P
    Similarly
    G – 2 = E
    O – 2 = M
    O – 2 = M
    G – 2 = E
    L – 2 = J
    E – 2 = C
    So the word becomes EMMEJC
  • Question 2
    1.2 / -0
    Mike started running from his house in the morning. He ran 3 km in the east direction and then took a left turn and ran 2 km. He again turned towards east and ran another 1 km and then turned right and ran 2 km. What is his displacement from his initial point of running?
    Solution
    According to the information given, the diagram becomes:


    A is the initial position and E is the final position.
    The displacement is the shortest distance between the initial and final point, that is 4 kms here.
    Hence, answer option 1 is correct .
  • Question 3
    1.2 / -0
    Directions: In the following question, there is a certain relationship between two given terms on one side of (: :). One term is given on the other side of (: :), while another term is to be found from the given alternatives having the same relationship with this term as the terms of the given pair bear. Choose the best alternative.

    ADVANCE : RETREAT :: FEEBLE
    Solution
    ADVANCE is antonym for RETREAT
    Similarly, FEEBLE is an antonym for STURDY.
  • Question 4
    1.2 / -0
    While introducing Rohan, Suhana said, "He is my uncle's father's daughter's son. My father has no siblings and my mother has just one brother and no sister." How is Rohan related to Suhana?
    Solution
    According to the given information:
    The father of Rohan's maternal uncle (cannot be paternal uncle as Suhana's father is the only son) → the maternal grandfather of Rohan and daughter of the maternal grandfather → mother of Suhana - her son - Rohan - Suhana's brother.
  • Question 5
    1.2 / -0
    Complete the given series.

    14, 3, 16, 5, 18, ?
    Solution
    There are two series one is of even numbers starting from 14 and going up in 2s at odd positions and other is of odd numbers starting from 3.
    14 + 2 = 16
    16 + 2 = 18
    so, 18 + 2 = 20
    Similarly, 3 + 2 = 5
    5 + 2 = 7
    so, 7 + 2 = 9
    So the series become
    14, 3, 16, 5, 18, 7, 20 and so on.
  • Question 6
    1.2 / -0
    What will be the mirror image of the word "FOCUSED"?
    Solution
    Mirror image is an image or object which is identical in form to another, but with the structure reversed, as in a mirror.

  • Question 7
    1.2 / -0
    What number should come in place of question mark?

    Solution
    The square grid only consists of prime numbers. 23 is the only option that is a prime number.
  • Question 8
    1.2 / -0
    What is the missing part of the image?

    Solution
  • Question 9
    1.2 / -0
    How many lines will be there in the hexagon?

    Solution
    The number of lines in the shapes are one less than the number of sides in the shape.
    Hence, hexagon will have 5 lines (one less than the number of sides (6)).
  • Question 10
    1.2 / -0
    What is the water image of the word "DEFAULT"?
    Solution
    The reflection of an object, as seen in water, is called its water image. It is the inverted image obtained by turning the object upside down.

  • Question 11
    1.2 / -0
    An object is kept in a truck moving with acceleration "a". The surface of the truck is frictionless. Then

    (I) the acceleration of object is zero with respect to ground
    (II) the acceleration of object is -a with respect to truck
    (III) the acceleration of object is 0 with respect to truck
    Solution
    Since the friction is zero, there is n force on the object. Hence, the acceleration is zero with respect to ground. But in frame of truck, there is an inertia with respect to truck. Due to inertia, the acceleration is -a with respect to truck.
  • Question 12
    1.2 / -0
    A football of mass 410 g was moving with a velocity of 1.5 m/sec and was stopped by a footballer in 1.5 sec. What was the magnitude of force applied by the footballer to stop the football ?
    Solution
    We know that
    a =
    Here, v = 0
    u = 1.5 m/sec
    t = 1.5 sec
    So, putting the values,

    a =

    a = -1

    We also know that

    F = ma

    Here, m = 410 g = 0.41 kg

    So, F = 0.41 x (-1)

    Force acted on the football.

    F = -0.41 N
    Hence the magnitude of the force applied by the footballer on the ball is 0.41 N.
  • Question 13
    1.2 / -0
    It is commonly observed that while taking a high jump or a long jump, the athlete runs before jumping. Why does the athlete runs before taking a jump?
    Solution
    An athlete runs before jumping to gain momentum. Because it helps in jumping higher and longer because of inertia of motion gained due to the motion.
  • Question 14
    1.2 / -0
    Two masses of mass m and M are kept at a distance r in the air and the force between them is F. If the space between the two masses is filled by water and the force between them becomes F', then
    Solution
    Gravitational force between the two masses is independent of the medium in between them.
    So F' = F
  • Question 15
    1.2 / -0
    Two blocks X and Y of same material are fully immersed in the water. X is cone having same radius and height 'r' and Y is a sphere of radius r. Then the buoyant force is
    Solution
    Up thrust acting on the immersed block is equal to the weight of the water displaced.

    Up thrust = Density of the water × Volume displaced × Acceleration due to gravity.

    Hence, greater is the volume displaced, greater is the upthrust.

    Volume displaced by the cone (X) is

    Volume displaced by the sphere (Y) is

    Volume displaced by the sphere is more than the volume displaced by the cone. Hence, upthrust acting on the sphere is more.
  • Question 16
    1.2 / -0
    What kind of force does a fireman experiences while struggling to hold a hose – pipe?
    Solution
    This is because the stream of water rushing through the hose-pipe in the forward direction with a large speed exerts a large force on the hose-pipe in the backward direction. The force exerted on the hose-pipe in the backward direction is known as the reaction force. This reaction force tends to move the hose-pipe in the backward direction. Therefore, a fireman struggles to hold the hose-pipe strongly to keep it at rest.
  • Question 17
    1.2 / -0
    A gunman fires a bullet of mass 15 g with a velocity of 444 m/s. The bullet got embed in a freely suspended wooden case which is of mass 900 g. Find the velocity acquired by the wooden case.
    Solution
    Initial momentum of the bullet = 15 x 444 = 6660 g m/s
    Initial momentum of the wooden case = 900 g x 0 = 0
    Total momentum of the system before collision = 6660 + 0 = 6660 g m/s
    Let the velocity of the wooden case after the collision be v.
    As the bullet and the wooden case move together
    The mass of the system = 15 + 900 = 915 g
    We know that,
    momentum = mass x velocity = 915 g x v
    Applying the law of conservation of momentum,
    6660g m/s = 915 g x v
    So, v = = 7.27 m/s
  • Question 18
    1.2 / -0
    Which force directs the passengers to fall sideways when a speeding car takes a sharp turn?
    Solution
    When a speeding car takes a sharp turn, the centripetal force helps keep the car in its curved track. The part of passenger's body that is in contact with the car will be in its position due to frictional force.
    The rest of the body of the passengers will experience a centrifugal force which is directed away from the center of the curved path.
    So the passengers tend to fall sideways when a speeding car takes a sharp turn.
  • Question 19
    1.2 / -0
    What will be the momentum of a ball having mass 750 g at t = 1 sec which is thrown vertically upwards with a speed of 15 m/s? Take g = 10 m/s2.
    Solution
    We know that

    750 g = 0.75 kg

    u = 15 m/s

    Velocity of the ball at t = 1 sec.v = u + at v = 15 - 10 × 1 = 5 m/s

    Hence, momentum of the ball at t = 1 sec is p = mv

    p = 0.75 × 5 = 3.75 kgm/s
  • Question 20
    1.2 / -0
    The _________ energy of the bow is converted into _________ energy of arrow while arrow is shot from a bow. Which of the following options represent these energies respectively?
    Solution
    A stretched bow possesses elastic potential energy on the account of a change in its shape. To shoot an arrow, the bow is released. The elastic potential energy of the bow is converted into kinetic energy of the arrow.
  • Question 21
    1.2 / -0
    What is the mass of the vehicle if the vehicle accelerates at the rate of 15 after applying a force equal to 55000 N?
    Solution
    Given :
    a = 15
    F = 55000 N
    mass = m
    We know that,
    F = m x a
    55000 N = m x 15
    m = kg
    m = 3666.66 kg
  • Question 22
    1.2 / -0
    What are the waves produced by earthquake called?
    Solution
    P waves, or Primary waves, are the first waves to arrive at a seismograph. P waves are the fastest seismic waves and can move through solid, liquid or gas. They leave behind a trail of compressions and rarefactions on the medium they move through. So P waves are longitudinal waves.
  • Question 23
    1.2 / -0
    Rohit fires a gun while standing at a distance of 60 m from a wall. What is the time for an echo to be heard if the speed of the sound is 330 m/s?
    Solution
    Given :
    d = 60 m
    v = 330 m/s
    To find : t = ?
    We know that,
    2d = v x t
    or t = 2d ÷ v
    t = 2 x 60 ÷ 330
    t = 120 ÷ 330
    t = 0.36 s
  • Question 24
    1.2 / -0
    The term 'Matter' is used to represent everything that has mass and occupies space. Which of the following cannot be classified as matter?
    Solution
    Matter is anything that has mass and occupies space. Light is a form of energy. It is an electromagnetic wave and cannot be classified as matter, as it does not possess mass nor does it occupy space.
  • Question 25
    1.2 / -0
    CO2, obtained from different sources, always contains Carbon and Oxygen atoms in the respective ratio of 1 : 2. This is in accordance with which of the following?
    Solution
    Law of definite proportions given by Joseph Proust states that elements combine in a fixed proportion by mass to form compounds. Hence, the mass as well as the number of atoms of each element in the molecule of a compound is fixed.
  • Question 26
    1.2 / -0
    In which of the following is the rate of diffusion the slowest?
    Solution
    The rate of diffusion depends on the kinetic energy of the particles.
    Since the molecules in the gaseous state possess the highest kinetic energy, they exhibit the highest rate of diffusion.
    Kinetic energy of the molecules in the solid state is the least and hence, the rate of diffusion is the slowest in case of CuSO4 crystal.
  • Question 27
    1.2 / -0
    The following points are the postulates of an important theory regarding the states of matter:

    (i) Matter in any state is composed of small particles, which may be molecules, atoms, or ions.
    (ii) Particles are arranged in such a way that there is space between the particles. The amount of interparticle space differs in different forms of matter.
    (iii) Particles are in continuous random motion.
    (iv) Molecules of a given substance attract each other.

    The theory represented here is

    Solution
    The Kinetic molecular theory is based on the following postulates, or assumptions:


    1. Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.2. These particles move in a straight line until they collide with another particle or the walls of the container.
    3. These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space.
    4. There is no force of attraction between gas particles or between the particles and the walls of the container.
    5. Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.
    6. The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.
  • Question 28
    1.2 / -0
    Which of the following is a heterogeneous mixture?
    Solution
    Colloids and suspensions are heterogeneous mixtures. Milk is a colloid and does not have a uniform composition throughout its volume.
    All the other options are examples of true solutions and are homogeneous.
  • Question 29
    1.2 / -0
    Which of the following is/are the essential condition(s) for the liquefaction of gases?
    Solution
    In order to liquefy the gases, the kinetic energy of the molecules must decrease and the intermolecular forces of attraction increase. Every gas has a critical temperature, at or below which it liquefies on increasing the pressure.
    Hence, in order to liquefy the gases, the temperature should be decreased and the pressure should be increased.
  • Question 30
    1.2 / -0
    Which of the following scientists proposed that all atoms of a given element are identical in their mass and properties and those of different elements are different in every respect?
    Solution
    Dalton gave an atomic theory, according to which:

    (1) All matter is made of atoms. Atoms are indivisible and indestructible.
    (2) All atoms of a given element are identical in mass and properties.
    (3) Atoms of different elements are different in every respect.

    However, the second postulate was modified with the discovery of isotopes which are atoms of the same element having different mass.
    Hence, isotopes have the same atomic number but different mass number; for example, are isotopes of carbon.
  • Question 31
    1.2 / -0
    Who came to be known as the father of nuclear physics?
    Solution
    Ernest Rutherford was a New Zealand-born British physicist who came to be known as the father of nuclear physics. He is the scientist who for the first time introduced the concept of atomic nucleus as a conclusion drawn from his alpha particle scattering experiment.
  • Question 32
    1.2 / -0
    Find the number of formula units in 276 g of K2CO3.
    [Given the atomic masses of K, C and O are 39 u, 12 u and 16 u, respectively.]
    Solution
    Formula unit mass of K2CO3 = 2 x atomic mass of K + 1 x atomic mass of C + 3 x atomic mass of O

    = 2 x 39 u + 1 x 12 u + 3 x 16 u = 78u + 12u + 48u = 138u

    Therefore, the molar mass of K2CO3 will be 138 g.

    Number of moles of K2CO3 =

    Therefore, number of formula units = 2N0
  • Question 33
    1.2 / -0
    A silver ring contains 90% of the silver and the rest is copper. How many atoms of silver are present in 1 gram of this silver ring?
    Solution
    One gram of silver ring will contain: = 0.9 g of silver

    Number of moles of silver = = = 0.0083

    One mole of silver contains NA atoms, i.e. .

    Therefore, 0.0083 mole of silver will contain: 0.0083 x = 4.99 x1021 atoms
  • Question 34
    1.2 / -0
    In the cells of oil seeds which of the cell organelles have to be more active?
    Solution
    Smooth Endoplasmic Reticulum are the organelles responsible for the synthesis of lipids in a cell. Hence, the cells of oil seeds will have greater number and higher activity of SER.
  • Question 35
    1.2 / -0
    All of the following are correct about the food chain, except
    Solution
    Pesticides tend to be concentrated in the highest amount at the topmost consumer level . This phenomenon is known as biomagnification.
  • Question 36
    1.2 / -0
    Refer to the diagram given below:



    Choose the incorrect option regarding the tissue shown in the diagram.
    Solution
    The tissue shown in the diagram is sclerenchyma. It is a simple permanent tissue. The cells of this tissue are dead. They are long and narrow as the walls are thickened due to lignin. Often these walls are so thick that there is no internal space inside the cell. This tissue is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. It provides strength to the plant parts.
  • Question 37
    1.2 / -0
    The taxon X contains plants without any specialised tissue for the conduction of water and other substances. The plant body is commonly differentiated to form stem and leaf-like structures. These are called the amphibians of the plant kingdom.

    In the above passage, X is:
    Solution
    Bryophytes are called the amphibians of the plant kingdom. The plant body is commonly differentiated to form stem and leaf-like structures. However, there is no specialised tissue for the conduction of water and other substances from one part of the plant body to another. Examples are moss (Funaria) and Marchantia.
  • Question 38
    1.2 / -0
    The composition of chromatin is:
    Solution
    The DNA double helix in the cell nucleus is packaged by special proteins termed histones. The formed protein/DNA complex is called chromatin.
  • Question 39
    1.2 / -0
    The shape of chloroplast in Chlamydomonas is
    Solution
    Chlamydomonas has a cup-shaped chloroplast, with a single large pyrenoid where starch is formed from photosynthetic products.
  • Question 40
    1.2 / -0
    Pollinating agent in pinus is
    Solution
    Because they don't have flowers with nectar and pollen, pine trees don't attract bees, butterflies and other pollinators; all they need for pollination is wind.
  • Question 41
    1.2 / -0
    Microbial diseases that can be spread from an infected person to a healthy person through air, water, food or physical contact are called X. There are some insects and animals that are Y of disease-causing microbes.

    Which of the following is an incorrect pair of insect/animal that are Y of disease-causing microbes and the corresponding disease?
    Solution
    The hepatitis B virus is spread when blood, semen, or other body fluid infected with the hepatitis B virus enters the body of a person who is not infected. It is not spread by means of cockroach.
  • Question 42
    1.2 / -0
    Which of the following body parts is/are affected in a person having hepatitis?
    Solution
    Hepatitis targets liver. It leads to inflammation of the liver tissue.
  • Question 43
    1.2 / -0
    The following question consists of an Assertion (A) and a Reason (R). Read both statements carefully and mark the appropriate option.

    (A) Assertion: The contents fizz out when a bottle of soda water is opened.
    (R) Reason: The contents from a bottle of soda water fizz out more if the bottle is opened after it has been placed in the sunlight for some time.
    Solution
    Soda water consists of carbon dioxide dissolved in water. Since solubility of gases increases with pressure, the bottles are sealed under pressure. On opening the bottle, pressure is released and the dissolved gas escapes into the atmosphere, which is why we see the effervescence.
    Solubility of a gas decreases with increase in temperature and fizzing is more if contents of the bottle are at a higher temperature.
    Hence, both (A) and (R) are correct, but (R) is not the right explanation of (A).
  • Question 44
    1.2 / -0
    The correct identification of the cell given below is:

    Solution
    Eosinophils are specialised immune cells. This proinflammatory white blood cell generally has a nucleus with two lobes (bilobed) and cytoplasm filled with approximately 200 large granules containing enzymes and proteins.
  • Question 45
    1.2 / -0
    Which of the following statements is/are true about cells?

    Statement 1: A cell is capable of independent existence.
    Statement 2: A cell carries out nutrition, respiration, excretion, transportation and reproduction.
    Solution
    A cell is capable of independent existence and can carry out all the functions which are necessary for a living being. A cell carries out nutrition, respiration, excretion, transportation and reproduction.
  • Question 46
    1.2 / -0
    If an object is thrown with initial velocity of 19.6 m/s in upward direction, then match the entities of the column I with column II. (Take g = 9.8 m/s2 and upward direction as positive)

    Column I Column II
    1.Maximum height attained (in m) a.-9.8
    2.Time taken to reach the maximum height (in sec) b.9.8
    3.Velocity of the object at t = 1sec (in m/s) c.2
    4.Velocity of the object at t = 3 sec (in m/s) d.19.6
    Solution
    At the maximum height, velocity of the object = 0
    Using





    Let the maximum height



    m

    Time take to reach at maximum height is t
    Using



    t = 2 sec

    Velocity at t = 1 sec

    v = 19.6 - 9.8 × 1 = 9.8 m /s

    Velocity at t = 3 sec

    v = 19.6 - 9.8 × 3 = -9.8 m /s
  • Question 47
    1.2 / -0
    Which of the following statements is/are true for Gravitation?

    Statement 1: Movement, or a tendency to move, away from center of gravity.
    Statement 2: Example is when you hold a ball up in the air, the mass of Earth allows the ball to fall towards the Earth.
    Solution
    Gravitation is movement, or a tendency to move, towards the center of gravity, as in the falling of bodies towards the Earth.
  • Question 48
    1.2 / -0
    A motorbike gets 20 seconds to increase the speed from 10 m/s to 60 m/s. If the mass of the motorbike is 180 kg, what force will be required to do so?
    Solution
    Given:
    u = 10m/s
    v = 60m/s
    t = 20 seconds
    m = 180 kg
    We know that,







    F = 450 or 450 N
  • Question 49
    1.2 / -0
    A periodic and repeating disturbance in a lake creates waves which emanate outward from its source to produce circular wave patterns. If the frequency of the source is 2.00 Hz and the wave speed is 5.00 m/s, then the distance between adjacent wave crest and the trough is ___ meter.
    Solution
    Speed of the wave = wavelength × frequency





    Distance between consecutive crest and the trough is half of the wavelength i.e. 1.25 m
  • Question 50
    1.2 / -0
    The graph shown below gives measurements of different types of blood vessels.



    Select the correct option regarding these vessels.
    Solution
    The correct identification of X, Y and Z is:
    X - Artery
    Y - Vein
    Z - Capillary
    Pulmonary artery carries deoxygenated blood. Hence, option 2 is incorrect.
    Pulmonary veins carry oxygenated blood. Hence, option 3 is incorrect.
    Option 1 is correct as capillaries are thin-walled with least diameter of the lumen.
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