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NSO - Mock Test - 4

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NSO - Mock Test - 4
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  • Question 1
    1.2 / -0
    If PROFESSOR is coded as OSNGDTRPQ, then the word ALLOWED will be coded as:
    Solution
    In the given word PROFESSOR, the following pattern is used:
    P – 1 = O
    R + 1 = S
    O – 1 = N
    F + 1 = G
    E – 1 = D
    S + 1 = T
    S – 1 = R
    O + 1 = P
    R – 1 = Q
    Similarly, ALLOWED will be coded as follows:
    A – 1 = Z
    L + 1 = M
    L – 1 = K
    O + 1 = P
    W – 1 = V
    E + 1 = F
    D – 1 = C
  • Question 2
    1.2 / -0
    Find the missing number in the given pattern:

    Solution
    The given figure follows a pattern as given below:
    7 x 5 = 35 – 5 = 30
    9 x 4 = 36 – 4 = 32
    6 x 3 = 18 – 3 = 15
    Therefore, the missing number is 15.
  • Question 3
    1.2 / -0
    Directions: In the following question, there is a relationship between the two terms to the left of (: :) and the same relationship holds between the two terms to its right, out of which one term is missing. Choose the missing term from the given options.

    63 : 126 : : 215 : ?
    Solution
    According to the question,
    43 - 1 = 63
    (4 + 1)3 + 1 = 126
    Similarly,
    63 - 1 = 215
    (6 +1)3 + 1 = 344
  • Question 4
    1.2 / -0
    Find the mirror image of the following figure:

    Solution
  • Question 5
    1.2 / -0
    In which of the following options is the image given below not embedded?

    Solution
    The given image is not embedded in the figure given in option (1). So, option (1) is the correct answer.
  • Question 6
    1.2 / -0
    Find the missing terms in the given pattern:

    E, M, F, L, G, K, ?, ?
    Solution
    The given pattern is made up of two series:
    (i) E, F, G, ?
    (ii) M, L, K, ?
    Now, in the first series, the pattern is to add 1.
    So, E + 1 = F
    F + 1 = G
    G + 1 = H
    In the second series, the pattern is to subtract 1.
    So, M - 1 = L
    L - 1 = K
    K - 1 = J
    Therefore, the missing terms are H and J.
  • Question 7
    1.2 / -0
    If ACE : IKM, then which of the following is true?
    Solution
    According to the question,
    ACE : IKM
    The pattern followed is as follows:
    A + 8 = I
    C + 8 = K
    E + 8 = M
    Now, out of the given options, the same rule is applied for option 2 as follows:
    R + 8 = Z
    T + 8 = B
    V + 8 = D
  • Question 8
    1.2 / -0
    Look at this series: 53, 53, 40, 40, 27, 27, ...

    What number should come next?
    Solution
    In this series, each number is repeated, then 13 is subtracted to arrive at the next number.
    So, 27 - 13 = 14
    Hence, option (2) is the correct answer.
  • Question 9
    1.2 / -0
    If Pintu is the brother of the son of Amar's son, how is Pintu related to Amar?
    Solution


    Son of Amar's son – Grandson
    Brother of Amar's grandson – Amar's grandson
    So, Pintu is Amar's grandson.
  • Question 10
    1.2 / -0
    Find the missing value in the following series:

    1, 2, 6, 15, 31, ?
    Solution
    The series is as follows:
    1 + 12 = 2
    2 + 22 = 6
    6 + 32 = 15
    15 + 42 = 31
    31 + 52 = 56
  • Question 11
    1.2 / -0
    Refer to the flow chart given below and choose the incorrect match.

    Solution
    Polar bear has long, curved and sharp claws, which help it walk on ice.
  • Question 12
    1.2 / -0
    Four identical bulbs are connected in the circuit, what will happen if bulb A is fused.


    Solution
    If bulb A is fused then no current will flow in wire connecting A, B, D , Hence non of B and D will glow. only C will glow.
  • Question 13
    1.2 / -0
    A cyclist is riding a bicycle. The force responsible for the forward movement of the bicycle is
    Solution
    The wheel of cycle will exert a backward force on the ground, as a result of which the ground will exert an equal and opposite force on the cycle. This reaction force is responsible for the upward moment of the bicycle.
  • Question 14
    1.2 / -0
    Which of the following is not an example of radiation?
    Solution
    In geyser heating is done by by convection , while in other three heat is transfer in the form of electromagnetic radiation.
  • Question 15
    1.2 / -0
    What type of image is formed by a plane mirror?
    Solution

    The image formed by a plane mirror is of the same size as that of the object, left-right inverted, and erect and virtual.
  • Question 16
    1.2 / -0
    Why do we have holes in banners and hoardings?
    Solution
    Holes are made in hanging banners and hoardings in order to tackle the air pressure. The air gets passed through these holes made on the hoardings or banners and thus, reduces the pressure of air on them. Therefore, the hoardings do not get blown away or tear due to air pressure.
  • Question 17
    1.2 / -0
    Which of the following states of India is not prone to cyclone?
    Solution
    Punjab is not prone to cyclone as it is not a coastal state.
  • Question 18
    1.2 / -0
    Which of the following is used as a magnifying glass?
    Solution
    A convex lens is used as a magnifying glass. The convex lens bends the parallel rays so that they converge and create a virtual image on our eyes retinas. That virtual image on our retinas appears larger than the real object due to principles of geometry.
  • Question 19
    1.2 / -0
    Which of the following is/are the best way(s) to help the neighbours in case of cyclone?
    Solution
    All the given options are the best ways to help the neighbours in case of cyclone.
  • Question 20
    1.2 / -0
    If a colourless aqueous solution of a substance turns blue litmus red, then what is the colour change expected when phenolphthalein indicator is added to it?
    Solution
    Since the aqueous solution of the substance turns blue litmus red, it is an acid.
    Acids remain colourless with phenolphthalein.
    Hence, option (4) is correct.
  • Question 21
    1.2 / -0
    Which of the following states experiences the see breeze?
    Solution
    Uttar Pradesh, Punjab and Haryana lie in north India. Goa is a coastal state, so it experiences the see breeze.
  • Question 22
    1.2 / -0


    Observe the part X of the plant shown in the figure given above. It helps in performing
    Solution
    Stomata are responsible for gaseous exchange occurring during photosynthesis and respiration. Loss of water during transpiration also occurs through stomata.
  • Question 23
    1.2 / -0
    Which of the following is not an adaptation of camels to live in hot deserts?
    Solution
    Camels have thick fur. They excrete very small amount of urine and dry dung which help them to conserve water. There's no evidence, though, that camels can store water for long periods of time anywhere in their bodies. Camels store fat in their humps, not water. They can very efficiently conserve water but not store it. Rather than directly storing water, camels are built for adapting to the scarcity of water.
  • Question 24
    1.2 / -0
    Which one of the following countries has tropical rainforests?
    Solution
    Rainforest is found generally near the equator. Places near the equator receive more sunshine and, therefore, more rainfall. This makes the place hot and humid. Temperatures vary from 15oC to 40oC generally near the equator. Rain forests are also present in some tropical areas.Tropical rainforests are warm and moist; while temperate rainforests are cool. To be a tropical rainforest, forested areas must lie between the Tropic of Cancer and the Tropic of Capricorn. One third of the world's tropical rainforests are in Brazil.
  • Question 25
    1.2 / -0
    Directions: Look at the given diagram carefully and answer the question.



    Which of the following statements is incorrect about A?
    Solution
    A represents gills of fish.
    Gills are well supplied with blood vessels. Diffusion occurs in gills and oxygen diffuses in the blood vessels of fish from gills.
    Gills are projections of skin found in aquatic organisms.
    Gills are used by fish in respiration and not for drinking water.
  • Question 26
    1.2 / -0
    Which of the following is the correct explanation of 'land breeze'?
    Solution
    When winds flow from land to ocean, they are called land breeze. During night, the land cools down faster than the ocean surface. The warmer air from the ocean surface rises up and creates an area of low pressure near the surface. This is filled in by cooler air from the land. This gives rise to the land breeze.
  • Question 27
    1.2 / -0
    Which of the following organisms have spiracles through which air enters in their body?
    Solution
    Cockroaches and other insects breathe through spiracles and tracheae. There is a network of hollow tubes running through the body of an insect. These hollow tubes are called trachea. Each trachea opens on the body surface in the form of very small pore. These pores are called spiracles.
  • Question 28
    1.2 / -0
    What kind of climate is there in tropical regions?
    Solution
    Rainforest is found generally near the equator. Places near the equator receive more sunshine and, therefore, more rainfall. This makes the place hot and humid. Temperatures vary from 15oC to 40oC generally near the equator. Rainforests are also present in some tropical areas. Tropical rainforests are warm and moist.
  • Question 29
    1.2 / -0
    What is the role of lactic acid production in our body during intense exercise?
    Solution
    During intense exercise, there may not be enough oxygen available to complete the process, so a substance called lactate is made. Our body can convert this lactate to energy without using oxygen.
  • Question 30
    1.2 / -0
    A student, while setting up the experiment to show that CO2 is evolved during respiration, committed some errors shown in the figure below:



    What changes should be made in the setup to get the desired results?
    Solution
    KOH solution should be taken in the small test tube inside the flask and water should be taken in the beaker.
  • Question 31
    1.2 / -0
    Which of the following is/are true for aerobic respiration?
    Solution
    Aerobic respiration takes place in the presence of oxygen. Carbon dioxide and water are the end products of aerobic respiration. Aerobic respiration happens in most of the organisms.
    Glucose Carbon dioxide + Water + Energy
  • Question 32
    1.2 / -0
    Which of the following animals breathe through skin?
    Solution
    Earthworms breathe through their skin. The skin of an earthworm always remains moist, which helps in breathing.
  • Question 33
    1.2 / -0
    Refer to the diagram given below.


    Bees hover over the flowers to collect nectar from them. During this, bees carry X from one flower to the other. Which part of the flower should the bees touch in order to collect X?
    Solution
    While collecting nectar, the bees also carry pollen grains with them. Pollen grains are produced in the anther which is represented by Q.
  • Question 34
    1.2 / -0
    Of the two test tubes shown in the picture, one contains an acid and the other contains water.



    Which of the following is a suitable indicator to detect the contents of the test tube?
    Solution
    Methyl orange shows red colour in acidic medium and would remain orange with water.
    Hence, option (1) is correct.
    Clove oil would retain its odour with both acid and water.
    Phenolphthalein is colourless in acidic as well as neutral medium.
    Both acid and water will have no effect on red litmus paper.
  • Question 35
    1.2 / -0
    In higher plants, usually the haploid (half) set of chromosomes is present in
    Solution
    From the options given, only pollen represents the male gamete structure. Therefore, it will have half the number of chromosomes present in other cells.
  • Question 36
    1.2 / -0
    Which of the following is not a measure for the conservation of water?
    Solution
    Water conservation includes all the policies, strategies and activities undertaken to sustainably manage the natural resource of fresh water, in order to protect the water environment and to meet the current and future human demand.
    Hydroelectricity is a method of generating electricity by using the potential energy of water preserved in dams to run the turbines in a hydroelectric plant. It is not directly related to water conservation.
  • Question 37
    1.2 / -0
    What is the study of light called?
    Solution
    Optics is the study of light. Optics, a segment of physics, evaluates and analyses the properties and behaviours of light.
  • Question 38
    1.2 / -0
    Directions: Analyse the two statements given below and select the correct option.

    Statement I: Patanwadi sheep is found in Gujarat.
    Statement II: Patanwadi wool is used for hosiery.
    Solution
    The Patanwadi is found in the coastal plains of the Saurashtra and Kutch regions of Gujarat, and the sandy loamy areas of Patan, Panch Mahals and Mehsana districts of Gujarat.
    The wool is of superior quality and is used for hosiery.
    Hence, option (2) is correct.
  • Question 39
    1.2 / -0
    Which of the following is/are responsible for clotting or coagulation of blood?
    Solution
    Platelets are responsible for clotting or coagulation of blood. In case of an injury, the blood clots after some time. This prevents excess loss of blood. Clotting of blood is a defence mechanism in the body.
  • Question 40
    1.2 / -0
    Which of the following methods is used by unicellular plants like yeast for reproduction?
    Solution
    Budding is a method which is used by unicellular plants like yeast for reproduction. Yeast is a fungus and fungi are also known as non-green plants. The yeast cell produces a bud which gets its own nucleus. The bud develops to a certain size and detaches from the mother cell to produce the new yeast.
  • Question 41
    1.2 / -0
    A car travels from Ludhiana to Delhi with a speed of 30 km/h and returns with a speed of 60 km/h. What is the average speed for the whole journey?
    Solution
    Let the time taken to travel from Ludhiana to Delhi be t1 and that from Delhi to Ludhiana be t2.
    t1 = d/30, t2 = d/60
    Total distance = 2d
    Average speed =
    Hence, the correct option is (1).
  • Question 42
    1.2 / -0
    Observe the image below and the colour of the solutions when universal indicator is added to them.

    Select from the options provided, the combination of acid and base respectively that could justify the picture.

    Solution


    Since the salt solution formed gives a green colour with universal indicator, the salt is a neutral salt and will be formed in a neutralization reaction between a strong acid and a strong base.


    Hence, option (2) is correct.
    NOTE: Acetic acid (CH3COOH) is a weak acid and Ammonium hydroxide (NH4OH) is a weak base.
  • Question 43
    1.2 / -0
    Silk is a continuous filament made up of secretions by the salivary glands of the silkworm. These secretions contain two proteins, X that makes up the filament and Y, which is a gum that holds the filaments together.

    'X' and 'Y' respectively are:
    Solution
    Silk is a natural protein fibre, some forms of which can be woven into textiles. The fibre is composed mainly of fibroin protein, which is produced by the larvae (silk worms) to form cocoons. Sericin is the binding protein which binds the solid fibre (fibroin).
  • Question 44
    1.2 / -0
    Which of the following types of teeth are used for fine grinding of food?
    Solution
    There are two molars on both sides in both the jaws. They have almost a flat surface with small projections. These teeth are meant for fine grinding of food.
    There are total 12 molar teeth including the wisdom teeth in an adult human. Wisdom teeth usually grow between the ages of 18 and 21.
  • Question 45
    1.2 / -0
    Observe the following classification of 'Changes around us' and analyse the statements that follow.



    I. 'W' could be digestion of food.
    II. 'X' could be cutting of a log of wood into pieces.
    III. 'Y' could be rotting of fruits and vegetables.
    IV. 'Z' could be evaporation of water from the water bodies.

    Which of the above statements regarding 'W', 'X', 'Y' and 'Z' are FALSE?
    Solution
    Digestion of food is a chemical change.
    Cutting of a log of wood into pieces is a physical change.
    Rotting of fruits and vegetables is a chemical change. It occurs when saprophytic microbes decompose the organic matter by secreting some digestive enzymes.
    Evaporation of water from the water bodies is a physical change.
    Hence, statements I and IV are false.
  • Question 46
    1.2 / -0
    Study the following diagrams carefully and select the option which shows the correct statements regarding them.



    Statements:
    (a) (A) shows xylem and (B) shows phloem.
    (b) (A) has end walls between cells and (B) has no end walls between cells.
    (c) In (A), transport of water and minerals is taking place; in (B), transport of food is taking place.
    (d) In (A), transport of food is taking place; in (B), transport of water and minerals is taking place.
    (e) (A) has no end walls between cells and (B) has end walls between cells.
    (f) (A) shows phloem (B) shows xylem.
    Solution
    For transportation in plants, there are two main tissues viz. xylem and phloem. These are composed of narrow tube-like structures. Xylem is responsible for transport of water, while phloem is responsible for transport of food.

    (A) shows xylem and (B) shows phloem.

  • Question 47
    1.2 / -0
    There are various types of asexual reproduction in plants and organisms. Which of the following options is correct about the given diagrams?

    Solution
    Budding is a type of asexual reproduction in plants and organisms. It is used by unicellular plants; like yeast. Yeast is a fungus and fungi are also known as non-green plants. The yeast cell produces a bud which gets its own nucleus. The bud develops to a certain size and detaches from the mother cell to produce the new yeast. Picture (A) shows budding in yeast.
    In some simple plants, the plant body is divided into smaller fragments. Each fragment then develops into a new plant. This is called fragmentation. It is a type of asexual reproduction in plants and organisms. Example: Spirogyra. Picture (B) shows fragmentation in Spirogyra.
    Special spore-bearing organs are present in some plants; especially in fungi and algae. These are called sporangiophores. The sporangiophore bears spores. The spores germinate to develop a new plant. It is called spore formation. It is a type of asexual reproduction in plants and organisms. Picture (C) shows spore formation in fungi.
  • Question 48
    1.2 / -0
    Consider the following pictures:



    Which of the given statements is true about the given pictures?

    (1) (A) shows oscillatory motion, (B) shows odometer, (C) shows speedometer, (D) shows rectilinear motion
    (2) (A) shows rectilinear motion, (B) shows odometer, (C) shows speedometer, (D) shows oscillatory motion
    (3) (A) shows oscillatory motion, (B) shows speedometer, (C) shows odometer, (D) shows rectilinear motion
    (4) (A) shows circular motion, (B) shows odometer, (C) shows speedometer, (D) shows rectilinear motion
    Solution
    (A) When an object repeats its motion after every fixed interval of time, the motion of the object is called periodic motion or oscillatory motion. Swinging of a pendulum is an example of oscillatory motion.
    (B) Odometer is a device used to measure the distance covered by a vehicle. (B) shows odometer.
    (C) A device used to measure the speed of a vehicle is called speedometer. (C) shows speedometer.
    (D) Motion along a straight line is known as rectilinear motion. A boy riding a bicycle is an example of rectilinear motion.
  • Question 49
    1.2 / -0
    The column A of the following table lists certain steps to obtain wool from sheep. Match the processes with their correct explanation.

    A B
    (i) Shearing (a) Fibres are combed and rolled into yarn.
    (ii) Scouring (b) Burrs are dyed in desired colours.
    (iii) Sorting (c) Fleece is sorted according to the texture.
    (iv) Dyeing (d) Fleece is washed properly to remove dirt and grease.
    (v) Spinning (e) The fleece of sheep is shaved off along with a thin layer of skin.
    Solution
    Step 1: Shearing - It is the first step in the process of obtaining wool from the sheep. The fleece (hair) of sheep is shaved off along with a thin layer of skin.
    Step 2: Scouring - Fleece, after shearing, is washed properly to remove dirt and grease.
    Step 3: Sorting - After scouring, fleece is sorted according to the texture.
    Step 4: Dyeing - After sorting and picking out of burrs, these are dyed in desired colours.
    Step 5: Spinning - The fibres are then straightened, combed and rolled into yarn.
    Hence, option (3) is correct.
  • Question 50
    1.2 / -0
    A destarched leaf on a potted plant was covered with black (A), white (B) and transparent (C) strips of paper as shown in the figure.



    After six hours of exposure to sunlight, the leaf was removed from the plant and tested for starch. Which one of the following would be the correct observation?
    Solution
    The portion of leaf covered by transparent strip allows sunlight to pass through and hence, photosynthesis occurs there. It will therefore give a positive iodine test for the presence of starch.
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