NSO - Mock Test

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NSO - Mock Test - 7

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Weekly Quiz Competition

Question 1
1.2 / -0

Choose the water image of figure (X) from the following given options.

Figure (X)

A

B

C

D

Solution

Water image refers to the image which is flipped vertically. In the given figures, only figure 4 is flipped vertically and represents water image of figure (X).
Question 2
1.2 / -0

Choose the appropriate option which resembles the perfect mirror image of the following figure:

A

B

C

D

Solution

To get the mirror image, we need to flip it horizontally.
Out of the given options, figure 1 is the only image that is horizontally flip of the image given in the question.
Question 3
1.2 / -0

From the following options, choose the correct figure which uses figure (X) as its part.

Figure (X)

A

B

C

D

Solution

In figure (X), we can see a star shape having a small star shaped figure in the middle of it. Only figure 2 contains that kind of figure which has a big star and a small star in the middle of that star.
Question 4
1.2 / -0

Reptile is to lizard as flower is to

A
petal

B
stem

C
daisy

D
bud

Solution

A lizard is a type of reptile; a daisy is a type of flower. Choices 1 and 2 are incorrect because a petal and a stem are parts of a flower, not types of flowers. Choice 4 is incorrect because bud is a small growth at the tip or on the side of a stem that later develops into a flower, leaf, or branch.
Question 5
1.2 / -0

Look at this series:

36, 34, 30, 28, 24, ...

Which number should come next?

A
20

B
22

C
23

D
26

Solution

This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.
36 - 2 = 34
34 - 4 = 30
30 - 2 = 28
28 - 4 = 24
24 - 2 = 22
Question 6
1.2 / -0

Which of the following options is the correct coded form of HJK, if BDS is coded as FHW?

A
JKL

B
LNO

C
HJK

D
KLM

Solution

BDS is coded in such a way that all the letters are moving forward by 4 letters.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
H is moving forward by 4 to L.
J is moving forward by 4 to N.
K is moving forward by 4 to O.
So, the correct option is 2.
Question 7
1.2 / -0

Simran is the brother of Ishmeet, Ishmeet is the sister of Deep and Deep is the father of Samar. How is Simran related to Samar?

A
Sister

B
Brother

C
Brother-in-law

D
Uncle

Solution

Clearly, Simran is Samar's uncle.
Question 8
1.2 / -0

Select the related word from the given alternatives.

Ludhiana : City : : Haryana : ?

A
State

B
Capital

C
Union Territory

D
City

Solution

The option which is true for the given question is option 1, as Ludhiana is a city and Haryana is a State.
Question 9
1.2 / -0

Priyanka walks 5 km straight from her office towards west, then turns right and walks 3 km. After that, she takes a left turn and walks 2 km. Further, she turns left and walks 3 km. At last, she turns right and walks 3 km. Now, in which direction is she from the starting place?

A
North

B
South

C
East

D
West

Solution

From the above picture it is clear that Priyanka is in the west direction of her office.
Question 10
1.2 / -0

Find the missing term in the following series:

SCD, TEF, UGH, ____, WKL

A
CMN

B
UJI

C
VIJ

D
IJT

Solution

There are two alphabetical series here. The first series is with the first letters only: S, T, U, V, W. The second series involves the remaining letters: CD, EF, GH, IJ, KL.
So, VIJ is missing term.
Question 11
1.2 / -0

Which of the following in an example of weeds?

A
Paddy

B
Xanthium

C
Sorghum

D
Maize

Solution

Undesirable plants that grow along the crops is known as weeds. The process of removing weeds is known as weeding. Some of the examples of weeds are xanthium, parthenium, etc. So, option 2 is true.
Question 12
1.2 / -0

Which of the following options is not an example of traditional method of irrigation?

A
Pulley system

B
Chain pump

C
Drip system

D
Lever system

Solution

Option 3 is not an example of traditional method of irrigation. Drip system or drip irrigation has been popular in recent times only. It is a form of irrigation that saves water and fertiliser by allowing water to drip slowly to the roots.

Question 13

1.2 / -0

Match the causative organism in column A to the disease in column B.

A	B
1. Bacteria	a. Chicken pox
2. Virus	b. Polio
3. Protozoa	c. Cholera
	d. Typhoid
	e. Malaria

1 - a ; 2 - b ; 3 - c, d, e

1 - a, b ; 2 - c, d ; 3 - e

2 - a, b ; 1 - c, d ; 3 - e

1 - c, d, e ; 2 - b ; 3 - a

Solution

The causative organisms of cholera and typhoid are bacteria, while virus causes chicken pox and polio. Protozoa cause malaria.

Question 14
1.2 / -0

Some common methods of food preservation are given below:

P: Preservation by sugar
Q: Heat and cold treatments
R: Preservation by using chemicals
S: Preservation by oil and vinegar

Which of the statements is incorrect regarding methods of food preservation?

A
P increases the moisture content which inhibits the growth of bacteria

B
R uses sodium benzoate and sodium metabisulphite

C
Q is involved in the pasteurisation of milk

D
S is used in the preservation of fruits and vegetables in the form of pickles.

Solution

Jams, jellies and squashes are preserved by sugar. Sugar reduces the moisture content which inhibits the growth of bacteria which spoil food.
Question 15
1.2 / -0

Nylon is an important synthetic fibre that has a variety of applications.
Which of the following options about nylon is correct?

A
Nylon is made of repeating units of a chemical called ester.

B
Nylon is cheaper than natural wool and can be dyed in various colours, hence used as a replacement for wool.

C
A nylon is stronger than a steel wire of the same thickness.

D
Nylon is a good absorbent and has properties similar to cotton.

Solution

Only the statement (3) is correct because nylon has a greater tensile strength than steel.
All the other options are incorrect.
Nylon is a polyamide and the repeating units are amides not esters.
Nylon does not exhibit the properties of cotton or wool.
Question 16
1.2 / -0

Which of the following is not a characteristic property of plastics and hence, cannot be used to describe them?

A
Poor conductors

B
Biodegradable

C
Non-reactive

D
Strong and durable

Solution

Substances which get decomposed through the natural processes, such as action of bacteria, etc, are called biodegradable substances, e.g. potato peels, peels of other vegetable, food stuffs, fruit, paper, cotton cloths, wood, etc.
Plastics are non-biodegradable and cannot be decomposed by bacteria and other microbes.
Question 17
1.2 / -0

What does zinc give along with zinc chloride when it reacts with hydrochloric acid?

A
Chlorine gas

B
Chloric acid

C
Zinc oxide

D
Hydrogen gas

Solution

Zinc gives hydrogen gas along with zinc chloride when it reacts with hydrochloric acid.
Zn + 2HCl ZnCl₂ + H₂
Question 18
1.2 / -0

Which of the following does not react with dilute sulphuric acid on heating, but reacts with concentrated sulphuric acid?

A
Copper

B
Aluminium

C
Magnesium

D
Iron

Solution

Copper does not react with dilute sulphuric acid even on heating, but reacts with concentrated sulphuric acid.
Copper, silver and gold are considered as noble metals because of their low reactivity and they do not react with dilute acids.
Question 19
1.2 / -0

Analyze the two statements given below and select the correct option.

Statement I: In fractional distillation of petroleum, kerosene is collected in a lower part of the fractional column as compared to petrol.
Statement II: Petrol and kerosene have different boiling points.

A
Both the statements I and II are correct and statement II is the correct reason for statement I.

B
Both the statements I and II are correct but statement II is not the correct reason for statement I.

C
Statement I is correct but statement II is incorrect.

D
Both the statements I and II are incorrect.

Solution

The temperature in the lower parts of the fractional column is higher as compared to that in the upper parts. The component of mineral oil (petroleum) with a higher boiling point is collected in the lower parts of the fractional column.
In the fractional distillation of petroleum, kerosene is collected in the lower part of the fractional column than petrol because kerosene has a higher boiling point than petrol.
Hence, both the statements I and II are correct but statement II is not the correct reason for I.
Question 20
1.2 / -0

Which process is known as carbonisation?

A
Conversion of dead vegetation into coal

B
Melting of iron

C
Burning of tar

D
Fossilisation of dead plants and animals

Solution

About 300 millions year ago, dense forest in low lying lands of the earth got buried because of many natural processes. In a due course of time, they sank deeper and deeper. Beneath the earth, under the geothermal conditions of high pressure and temperature, they slowly converted into coal.
This slow process of conversion of dead vegetation into coal is called carbonisation because carbon is the chief component of coal.
Question 21
1.2 / -0

What is the reason for phases of the moon to occur?

A
We can see only that part of the moon which refracts light towards us.

B
Some part of the moon hides behind the dust in the atmosphere.

C
Our distance from the moon keeps changing.

D
We can see only that part of the moon which reflects light towards us.

Solution

The periods of rotation and revolution are the same in case of the moon. This means that the moon takes the same time in completing one rotation and one revolution. Due to this, only one surface of the moon is visible from the earth. Phases of the moon occur because we can see only that part of the moon which reflects light towards us. Moon does not produce its own light. We are able to see the moon because the sunlight falling on it gets reflected towards us. Thus, we see only that part of the moon from which the light of the sun gets reflected towards us.

Question 22

1.2 / -0

Study the dichotomous key and identify the components of air represented by W, X, Y and Z.

I. (i) Forms one fifth of the natural composition of air: W
(ii) It is a pollutant. Go to II
II. (i) Causes rise in global temperatures: X
(ii) A water soluble gas. Go to III
III. (i) Causes acid rain and summer smog: Y
(ii) Causes acid rain and winter smog: Z

Select the correct option:

	W	X	Y	Z
A.	Oxygen	Methane	Nitrogen dioxide	Sulphur dioxide
B.	Oxygen	Carbon dioxide	Nitrogen dioxide	Sulphur dioxide
C.	Nitrogen	Methane	Sulphur dioxide	Nitrogen dioxide
D.	Nitrogen	Carbon dioxide	Nitrogen dioxide	Sulphur dioxide

A

B

C

D

Solution

W is Oxygen, which forms one-fifth of the natural composition of air.
X is Methane, which is a green house gas and is responsible for global warming.
NOTE: Carbon dioxide is also a green house gas and is responsible for global warming. But being a water soluble gas it does not represent X.
Y is Nitrogen dioxide, which being water soluble comes down as acid rain. It is the gas that causes the reddish haze in the atmosphere, referred to as summer smog.
Z is Sulphur dioxide which is an air pollutant which is added to the atmosphere by combustion of coal and other fossil fuels. It is a major cause of acid rain and causes winter smog.
Hence, option (1) is correct.

Question 23
1.2 / -0

Which of the following options is FALSE?

A
Sodium and potassium are stored under kerosene.

B
Lemon pickle is stored in aluminium utensils.

C
Immersion rods for heating the liquids are made up of metallic substances.

D
Copper cannot displace zinc from its salt solution.

Solution

Metals react with acids and pickles are acidic in nature.
Hence, lemon pickle should not be stored in aluminium utensils as it would react with the metal to produce toxic substances..
Question 24
1.2 / -0

Refer to the Venn diagram given below and choose the correct option.

A
X represents a sickle, which is used to manually harvest crops.

B
X represents a combine machine, which functions both as a harvester and thresher.

C
X represents a harvester, which is used to separate seed from chaff.

D
X represents a winnowing machine, which is used to separate grain from chaff.

Solution

X stands for a combine machine, which can carry out both harvesting and threshing.
Question 25
1.2 / -0

Which of the following options shows a record that is maintained by Red Data Book?

A
Extinct species

B
All species

C
Endangered plants and animals

D
Endemic species

Solution

Red Data Book is the source book which keeps a record of all endangered animals and plants.
Question 26
1.2 / -0

Refer to the Venn diagram given above and choose the correct option.

A
X comprises only flora and fauna present on land.

B
X includes only non-living components.

C
In the zone X, various living and non-living organisms show interdependence.

D
No interaction between biotic and abiotic factors occurs in X.

Solution

X represents biosphere. Everything in the biosphere is interrelated. Plants, animals and microbes show interrelationship with respect to their nutritional requirement and habitat. All biotic and abiotic components show connection with each other.
Question 27
1.2 / -0

Which unit of distance is the easiest way to express distance between planets and the sun?

A
Kilometre

B
Parsec

C
Astronomical Unit

D
Nautical Mile

Solution

The distance between the sun and the Earth is one astronomical unit (AU). This unit of distance makes it easy to express the distances of different planets from the sun.
Question 28
1.2 / -0

Which planet can be seen in western sky after sunset?

A
Mercury

B
Venus

C
Jupiter

D
Uranus

Solution

Venus appears in the western sky after sunset and is called the evening star. As it does so, it changes from the "Evening Star", visible after sunset, to the "Morning Star", visible before sunrise. Although Mercury, the other inferior planet, reaches a maximum elongation of only 28° and is often difficult to discern in twilight, Venus is hard to miss when it is at its brightest.
Question 29
1.2 / -0

Which organ is present at the upper end of the windpipe of a human being?

A
Larynx

B
Vocals

C
Tonsils

D
Tongue

Solution

Larynx is situated at the upper end of the windpipe. There are two stretched membranes attached in larynx; with a narrow slit between them. When air passes through those stretched membranes, they produce different types of sounds with different combinations of stretching.
Question 30
1.2 / -0

Which one of the following properties of wave has no relation with other three properties?

A
Frequency

B
Amplitude

C
Wavelength

D
Speed

Solution

The product of wavelength and frequency gives the speed of wave , or , hence wavelength , frequency and speed are related to each other, while amplitude has no relation with wavelength , frequency and speed.
Question 31
1.2 / -0

Which of the following options is/are TRUE?

A
The carpet produces greater frictional force than the tiled surface.

B
We are more likely to slip while walking on a wet floor.

C
A bigger and heavier box is more difficult to be moved than a smaller and lighter box.

D
All of the above

Solution

A rough surface produces greater friction as compared to a smooth surface and a heavier object exerts a greater frictional force.
So,
1.The carpet produces greater frictional force than the tiled surface,
2.We are more likely to slip while walking on a wet floor
3.A bigger and heavier box is more difficult to be moved than a smaller and lighter box.
Question 32
1.2 / -0

Frictional force on any object depends on
1. mass of object
2. speed of object relative to surface.
3. coefficient of friction

Which of the above statements is/are correct?

A
All 1, 2 and 3

B
Only 1 and 3

C
Only 2 and 3

D
Only 1

Solution

The frictional force is given by umg, where u is coefficient of friction , m is mass and g is acceleration due to gravity
hence it just depends on mass and coefficient of friction.
Question 33
1.2 / -0

Abida and Ramesh were conducting an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick on the yellow part of the candle flame. Ramesh kept the beaker on the outermost part of the flame. Which of the following options is TRUE according to the situation?

A
Abida has kept the beaker in the non-luminous zone of the flame.

B
Ramesh's beaker will be heated faster

C
Abida's beaker will be heated faster

D
Ramesh has kept the beaker in the luminous zone of the flame.

Solution

The non-luminous (outermost) part of the flame is the hottest, on account of complete combustion of the fuel in this zone.
The luminous (Yellow, middle) part of the flame is less hot due to incomplete combustion.
Since Abida has kept the beaker in the luminous zone of the flame, the beaker will take more time to get heated.
On the other hand, Ramesh has kept the beaker in the non-luminous zone of the flame, so his beaker will be heated in shorter time.
Hence, option (2) is correct.
Question 34
1.2 / -0

L.P.G is the most common domestic fuel which is stored in cylinders or transported through pipelines.
Which of the following statements about L.P.G is/are incorrect?

I. It is a foul smelling gas.
II. It is a clean fuel with a high calorific value.
III. It undergoes spontaneous combustion in the gas burners.
IV. It is a mixture of hydrocarbons.

A
I and II

B
II and III

C
II and IV

D
I and III

Solution

L.P.G is an odourless gas by itself. However, it is mixed with a foul smelling mercaptane gas so that any leakage can be detected by the smell.
Hence, statement I is incorrect.
L.P.G undergoes rapid combustion, not spontaneous combustion.
Hence, statement III is incorrect.
Question 35
1.2 / -0

Which of the following substances is being used in the following picture?

A
Bitumen

B
Kerosene

C
LPG

D
Paraffin wax

Solution

Bitumen is the black viscous mixture of hydrocarbons obtained naturally or as a residue from petroleum distillation.
It is used as a binder in asphalt for roads, runways, parking lots and footpaths. Gravel and crushed rock are mixed with thick bitumen holding them together and then applied to roadways.
Question 36
1.2 / -0

Which of the following options is FALSE?

A
Weight is the force of gravity with which an object is pulled by the Earth.

B
Frictional forces are the forces that oppose or prevent motion.

C
A force results from the interaction between two objects.

D
Forces are measured in units called Joules (J).

Solution

Forces are measured in units called Newtons (N).
Question 37
1.2 / -0

Which of the following does not allow electricity to pass through it?

A
Tap water

B
Vinegar

C
Vegetable oil

D
Sea water

Solution

The option which is not a conductor is vegetable oil. Vegetable oil is not a good solvent. This means that there are not many ions in vegetable oil, so there is no easy path for electricity to flow.
Question 38
1.2 / -0

Which of the following is an application of electricity in our daily lives?

A
Conduction

B
Electroplating

C
Convection

D
All of these

Solution

Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes or to prevent corrosion of a metal. So, this is an application used in daily life to prevent rusting.
Question 39
1.2 / -0

Which of the following options is the point on the Earth's surface vertically above the focus of an earthquake?

A
Hypocentre

B
Pericentre

C
Epicentre

D
Apocentre

Solution

The point on the Earth's surface vertically above the focus of an earthquake is known as the epicentre. It is the area suffering the greatest damage.
Question 40
1.2 / -0

What is the transfer of charge from an object to the Earth known as?

A
Earthing

B
Static charges

C
Conduction

D
Lightening

Solution

In an electrical installation or an electricity supply system, an earthing system or grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes.
Question 41
1.2 / -0

When we apply force on an inflated balloon using both hands, its shape changes. Which of the following causes that change?

A
Force of Gravitation

B
Force of Motion

C
Force of Pressure

D
Force of Friction

Solution

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure. Various units are used to express pressure. When you apply force on an inflated balloon using your hand from both sides, the force of pressure changes the shape of the balloon.
Question 42
1.2 / -0

Which of the following forces will not change the potential energy of the body?

A
Gravitational force

B
Spring force

C
Magnetic force

D
Frictional force

Solution

Frictional force is a non-conservative force, so the work done by friction does not change potential energy of the body.
Question 43
1.2 / -0

Which of the following is a correct pair of organelle and its function?

A
Plasma membrane - Packaging of lipids into vesicles

B
Lysosome - Synthesis of proteins

C
Nucleus- Transmission of genetic material

D
Golgi complex - Storage of waste products

Solution

The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organised as DNA molecules, along with a variety of proteins, to form chromosomes.
Question 44
1.2 / -0

Which of the following endocrine glands is attached to the base of the brain by a thin stalk?

A
Pituitary gland

B
Thyroid gland

C
Adrenal gland

D
Pineal gland

Solution

Pituitary gland is about the size of a pea and is situated in a bony hollow, just behind the bridge of the nose. It is attached to the base of your brain by a thin stalk. The pituitary gland is often called the master gland because it controls several other hormone glands in our body, including the thyroid and adrenals, the ovaries and testicles.
Question 45
1.2 / -0

Which of the following is formed by fertilisation between two gametes?

A
Zygote

B
Placenta

C
Embryo

D
Blastula

Solution

A zygote is an eukaryotic cell formed by a fertilisation event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual. An individual is formed from a zygote which is a result of fusion of sperm from father and ovum from mother. Hence, it inherits some characteristics of father and some of mother.

Question 46

1.2 / -0

Match the elements listed in column B with their application listed in column A.

A	B
1. It is used for making engines.	a. Copper
2. It is used for making electric wires.	b. Carbon
3. It is used as a fuel.	c. Mercury
4. It is used in thermometers.	d. Iron
5. It is used in aircraft.	e. Titanium

1 – a, 2 – b, 3 – c, 4 – d, 5 – e

1 – e, 2 – d, 3 – c, 4 – b, 5 – a

1 – d, 2 – a, 3 – b, 4 – c, 5 – e

1 – d, 2 – b, 3 – c, 4 – a, 5 – e

Solution

The metal chiefly used for making engines of automobiles is iron.
The metal used for making electric wires is copper, as copper is light in weight and also a good conductor of electricity.
Carbon in the form of coal is used as a fuel.
The metal used in thermometers is mercury.
Titanium alloys are used in aircraft due to their high tensile strength to density ratio, high corrosion resistance, and ability to withstand moderately high temperatures without creeping.
Hence, option (3) is correct.

Question 47
1.2 / -0

Ravi performed an experiment in which he took two microorganisms X and Y that reproduce by binary fission. Just after cell division, he interchanged the nuclei of the two daughter organisms as shown in the figure given below:

Which of the following is the most likely result of his experiment?

A
Organisms P and S will show similar characteristics.

B
Organism Q will show characteristics of parent organism X.

C
Organism R will show characteristics of parent organism X.

D
Organisms P and Q will show similar characteristics.

Solution

Since P and S have similar genetic material, they will show similar characteristics.
Question 48
1.2 / -0

Arrange the following boxes in proper order to make a flowchart of sugarcane crop production.

A

B

C

D

Solution
Question 49
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Observe the table given below and the characteristics of its components, W, X, Y and Z.

W is a regenerated fibre.
X resembles wool.
Y is used as a non-stick coating for cookware.
Z is a polyester.

Which of the following options in context to W, X, Y and Z is incorrect?

A
W may be rayon.

B
X is acrylic.

C
Y is teflon.

D
Z may be nylon.

Solution

Rayon is a semi-synthetic fibre, regenerated from wood cellulose by treatment with chemicals like NaOH.
Acrylic fibres resemble wool.
Polyacrylonitrile (Teflon) is used to coat non-stick cookware.
Nylon and terylene have a lustre like silk, but nylon is a polyamide (chain of amide molecules) and terylene, also known as dacron, is a polyester (chain of ester molecules).
Hence, the information in option (4) is incorrect.
Question 50
1.2 / -0

In which of the following options is friction not being used?

A

B

C

D

Solution

In options 1, 2, and 3, friction is being used but in option 4, there is a compass which works with the help of magnetic force, and not frictional force.