Indian Army Agniveer Technical Mock Test - 5 - Indian Army Agniveer MCQ

The Venn diagrams best represent the relationship between - Mammals, Zebra, Animals figures are shown below:

Mammals mean an animal of the type that gives birth to live babies, not eggs and feeds its young on milk from its own body.

So, all Zebras are mammals animals.

Hence, ‘option 1’ is the correct answer.

Concept:

Surface-to-air missile (SAM):

• A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM), is a weapon that can be fired from the ground in order to take out aircraft or other missiles.
• This particular antiaircraft defence system is used by contemporary armed forces.

Explanation:

Trishul:

• It is a quick-reaction, all-weather surface-to-air missile with a short range (500 m to 9 km) that was created by India to defend against a low-level attack.
• As a part of the Integrated Guided Missile Development Program, it was created by DRDO.
• It can also be deployed from a ship as an anti-sea skimmer against moving targets and low-flying assault missiles.

Thus, Trishul is a surface-to-air missile.

Additional Information
Prithvi:

• The Integrated Guided Missile Development Program was used by the Defence Research and Development Organization of India to create the tactical surface-to-surface short-range ballistic missile known as Prithvi.
• It is sent out by the Strategic Forces Command of India.

Agni:

• India developed the Agni missile, an intercontinental ballistic missile.
• It bears the name of one of the five natural elements.
• The Integrated Guided Missile Development Program (lGMDP) was used to create Agni-I, the first missile in the series, which was tested in 1989.

Dhanush:

• Dhanush missile is an Indian short-range, ship-launched ballistic missile (ShLBM).

The leader who opposed the Champaran satyagraha of Mahatma Gandhi was N.G Ranga.

Key Points

• Gandhiji successfully led this Satyagraha in March-April, 1917.
• Gandhiji went to jail during Satyagraha which was his first jail/arrest in India.
• It was Gandhiji's first Satyagraha in India.
• European planters forced the cultivators to cultivate indigo on 3/20th of their holdings (known as the tinkathia system).
• The Government appointed a Commission and nominated Gandhiji as one of its members.

• Planters refunded only twenty-five per cent of the money they had taken illegally from the peasants.

• During this satyagraha N.G Ranga opposed Gandhiji.

• N.G Ranga was the founding member of All India Kisan Sabha (AIKS) at the Lucknow session of the Congress in April 1936.

• Sahajanda Saraswati was elected as its first president and Ranga as a general secretary.

Hence we can conclude that the leader who opposed the Champaran satyagraha of Mahatma Gandhi was N.G Ranga.

Additional Information

• Ferozeshah Mehta was one of the founding members of the Indian National Congress.
• Madan Mohan Malviya was a moderate leader and opposed separate electorates for Muslims under the Lucknow Pact of 1916. The Mahamana title was conferred on him by Gandhiji.
• Bal Gangadhar Tilak was an extremist leader of the Indian National Movement.

The Correct answer is USA.

Key Points The concept of dual citizenship, also known as dual nationality, exists in various countries around the world. Different nations have different laws and regulations regarding dual citizenship, and some countries explicitly allow individuals to hold citizenship in more than one country. Examples of countries that generally permit dual citizenship include:

• United States: The U.S. generally allows dual citizenship.
• Canada: Canada permits dual citizenship.
• United Kingdom: The UK allows dual citizenship.
• Australia: Australia generally allows dual citizenship.
• India: India permits dual citizenship under specific circumstances.
• Philippines: The Philippines allows dual citizenship.
• Italy: Italy generally allows dual citizenship.

1. Harass - This implies persistently troubling or bothering someone.
2. Annoy - This means to irritate or bother, often in a less intense or less aggressive manner than harassment.
3. Ravage - Unlike the other words, which deal with emotional or minor physical disturbances, "ravage" implies severe damage or destruction, often used in the context of natural disasters, wars, or something that physically destroys.
4. Distress - This involves causing someone to feel extremely worried, upset, or troubled, often as a result of a particular event or situation.

While "harass," "annoy," and "distress" are primarily concerned with causing emotional turmoil or irritation, "ravage" stands out because it refers to causing severe and extensive damage or destruction,

The correct answer is Shehnai.

Key Points

Shehnai:

• It is a reed instrument in which there are seven holes along the tube which are used for playing the melody by opening and closing them with the fingers.
• It is known as a Mangal Vadya and is usually played on all auspicious occasions in north India such as marriages, temple festivals, etc.
• The Shehnai is considered to have come to India from West Asia, there are other scholars who believe that this instrument travelled to China from India.
• It is now a popular instrument in concerts, the sound is very sweet and suited for playing Raga Sangeet.
• In the early fifties of this century, Ustad Bismillah Khan is credited for popularizing this instrument.
• Today, Pt. Anant Lal and Pt. Daya Shankar is also a noted Shehnai player.

​

The logic followed here is:

Ranchi : Jharkhand → Ranchi city is the capital of Jharkhand.

Similarly,

Dispur : Assam → Dispur city is the capital of Assam.

Hence, the correct answer is "Assam".

Additional Information

The logic followed here is:

‘CLOUD’ is written as ‘59432’

And,

‘RAIN’ is written as ‘1678’,

Similarly,

‘AROUND’ be written as

Therefore, AROUND’ be written as '614382'

Hence, "Option (1)" is the correct answer.

Given:

Two matrices A and B of same order is given.

Concept Used:

A' = A, then A will be a symmetric matrix,

A' = - A, then A will be a skew- symmetric matrix.

Solution:

We have,

(AB' - BA') if we calculate (AB' - BA')'

⇒ (AB' - BA')' = (AB')' - (BA')'

⇒ (AB' - BA')' = (B')' A' - (A')' B' {(AB)' = B'A'}

⇒ (AB' - BA')" = B A' - A B' {(A')' = A}

⇒ (AB' - BA')' = - (AB' - BA')

Hence (AB' - BA') is skew-symmetric matrix.

$\therefore$ Option 1 is correct.

Given:

Concept used:

Calculation:

∴ The required value is 7/4.

Concept used:

Simple Interest (SI)

SI = PRT / 100

where

P = Principal

R = Rate percent per annum

T = Time taken

Calculation:

Let the principal be Rs. x.

When sum is doubled the amount will be Rs. 2x.

Amount = Principal + SI

2x = x + SI

SI = 2x - x

SI = x

Thus, for T = 10 years,

SI = PRT / 100

x = x(R)(10) / 100

R = 100 / 10

R = 10%.

∴ Rate of interest is 10% per annum.

Solution:

Given, S1 = {x ϵ R ∶ x2 + | x | - 2 = 0} and S2 = {x ϵ R ∶ x2 + x - 2 = 0}

For S₁ : x² + |x| - 2 = 0

Case 1: x ≥ 0

x² + x - 2 = 0

⇒ x² + 2x - x - 2 = 0

⇒ x(x + 2) -1(x + 2) = 0

⇒ (x - 1)(x + 2) = 0

⇒ x = 1 and -2

But according to case 1, x ≠ -2

x = 1

Case 2: x < 0

x² - x - 2 = 0

⇒ x² + x - 2x - 2 = 0

⇒ x(x + 1) -2(x + 1) = 0

⇒ (x - 2)( x + 1) = 0

⇒ x = 2 and -1

But according to case 2, x ≠ 2

x = -1

Hence, S₁ = {1, -1}

For S₂: x² + x - 2 = 0

⇒ x2 + 2x - x - 2 = 0

⇒ x(x + 2) -1(x + 2) = 0

⇒ (x - 1)(x + 2) = 0

⇒ x = 1 and -2

Hence, S₂ = {1, -2}

So, S₁ ∩ S₂ = {1, -1} ∩ {1, -2}

= {1}

∴ The correct option is (4)

Given:

The sum of all the heads of hens and goats = 77

The sum of the legs of hens and goats = 248

Calculation:

Let the number of heads of hens and goats be x and y respectively.

Now, according to the question

The sum of all the heads of hens and goats = 77

⇒ x + y = 77 -----(1)

And, sum of their legs = 248

As hens have two legs each and goats have four legs each.

So, 2x + 4y = 248 -----(2)

Multiplying equation (1) with 2, we get

⇒ 2x + 4y = 154 -----(3)

Now, subtracting equation (3) from (2), we get

⇒ 2x + 4y - 2x - 2y = (248 - 154)

⇒ 2y = 94

⇒ y = 47

Putting the value of y in equation (1), we get

⇒ x + 47 = 77

⇒ x = (77 - 47) = 30

∴ The required number of hens on the farm is 30.

∴ (n - 1) = 18

⇒ n = 18 + 1 = 19

Hence, option (3) is correct

Concept:

The solution of the linear differential equation  is given by

y × I.F =

Where P and Q are the functions of 'x' and I.F =

Explanation:

Given differential equation an be written as

⇒  which is linear.

So IF =

Option (2) is correct

The correct answer is Plane Mirror.

Key Points

• ​When a person stands in front of a mirror, an erect image where ‘right appears left and left appears right’ is obtained. This mirror is an example of a Plane Mirror.
  • The plane mirror refers to the mirror which is having a flat reflective surface.
  • The image formed by a plane mirror is virtual and erect, behind the mirror and the size of the image is equal to the size of the object.
  • When a person stands in front of a mirror, an erect image where ‘right appears left and left appears right’ is obtained and this is called a Laterally inverted image.

Image of the plane mirror:

Additional Information

Convex Mirror:

• If the outer surface of the spherical mirror is the reflecting surface then it is called a convex mirror. It is also called the diverging mirror.
• It reflects the light outwards.
• The nature of the image formed by a convex mirror does not depend on the distance of the object from the mirror.
• These images are always virtual, smaller than the object, and situated behind the mirror.

Concave Mirror:

• If the inner surface of the spherical mirror is the reflecting surface, then it is called a concave mirror. It is also called a focusing mirror or converging mirror.
• The size of the image produced by these mirrors can be larger or smaller than the object, depending upon the distance of the object from the mirror.
• The concave mirror can form both real as well as virtual images of any object.
• The concave mirror has a negative focal length.

The correct option is Event Horizon Telescope.

Key Points

• The Milky Way's central black hole was first captured in a photograph.
• It was photographed by the Event Horizon Telescope (EHT), an array that connected eight already-existing radio observatories all around the planet to create a single, "Earth-sized" virtual telescope.

Additional Information

Kepler Space Telescope:

• NASA launched the Kepler telescope in 2009 to look for planets the size of Earth orbiting other stars.
• It is now a retired space telescope.
• The spacecraft was launched into an Earth-trailing heliocentric orbit and is named after astronomer Johannes Kepler.

James Webb Space Telescope:

• Infrared astronomy is done with the James Webb Space Telescope, a space telescope.
• Being the largest optical telescope in orbit, it has a high resolution and sensitivity that enable it to see objects that the Hubble Space Telescope cannot because they are too ancient, far away, or faint.

Spitzer Space Telescope:

• NASA's Infrared Great Observatory, the Spitzer Space Telescope, was launched in 2003.
• In addition to many other discoveries throughout its 16 years of operation.
• Spitzer also analyzed the most distant known galaxies and revealed a system of seven Earth-sized planets orbiting a star 40 light-years away.

The correct answer is Latent heat

Key Points

• Latent heat of vaporization: It is the heat energy required to change 1 kg of the material in its liquid state at its boiling point to 1 kg of the material in its gaseous state.
  • It is also the amount of heat energy released when 1 kg of vapour changes into 1 kg of liquid.
  • For water at its normal boiling point or condensation temperature (100° C ), the latent heat of vaporization (the latent heat of steam)
• Latent heat of fusion: It is the heat energy required to change 1 kg of the material in its solid state at its melting point to 1 kg of the material in its liquid state.
  • It is also the amount of heat energy released when at melting point 1 kg of liquid changes to 1 kg of solid.
  • For water at its normal freezing temperatu or melting point (0° C), the latent heat of fusion (or latent heat of ice) is

EXPLANATION:

• The latent heat of vaporization is more than the latent heat of fusion.
• This is because when a substance gets converted from liquid to vapor, there is a large increase in volume.
• Hence more amount of heat is required But when a solid gets converted to a liquid, then the increase in volume is negligible.
• Hence a very less amount of heat is required. So, the latent heat of vaporisation is more than the latent heat of fusion.

The correct answer is Cooling .

Key Points

• Evaporation
  • The process by which a liquid changes into vapour even below its boiling point is called evaporation.
  • It may occur even at room temperature.
  • Evaporation causes cooling because when a liquid evaporates, it draws the latent heat of vaporisation from the surface it touches.

The correct answer is the power of a lens is defined as the reciprocal of its focal length.

Key Points

• The power of a lens is defined as the reciprocal of its focal length.
  • The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus
• The power P of a lens of focal length f (in meters) is given by P=(1/f).
• The SI unit of power of a lens is 'dioptre'.

Additional Information

• Nearsightedness (myopia) is a common vision condition in which you can see objects near you clearly, but objects farther away are blurry.
  • Glasses for myopia are often created with a concave (curved inwards) single vision lens, which moves the focus of the light to help you see clearly.
• Farsightedness (hypermetropia) is the condition of the eyes where the image of a nearby object is formed behind the retina.
  • Convex lenses are used to treat presbyopia, hypermetropia and aphakia.

As charges and velocities are same
F=q(V×B)
So having the same magnitude of charge and same velocity, they'll experience the same magnitude of force.

The Correct Answer is: Astronomy

Key Points

• Astronomy is the study of everything in the universe beyond Earth's atmosphere.
• That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars .
• It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles

Additional Information

• Geologists study the materials, processes, products, physical nature, and history of the Earth.
• Geomorphologists study Earth's landforms and landscapes in relation to the geologic and climatic processes and human activities, which form them Histology, also known as microscopic anatomy or microanatomy, is the branch of biology that studies the microscopic anatomy of biological tissues.
• cytology is the examination of individual cells or clusters of cells

The correct answer is Carbonic Acid.

• When carbon dioxide dissolves in water it gives Carbonic Acid.

Key Points

• When carbon dioxide dissolves in water it gives carbonic acid which can then become bicarbonate.
• This is how the carbonic acid shuttled around the body during aerobic respiration.
• Carbonic acid, (H₂CO₃), a compound of the elements hydrogen, carbon, and oxygen.
  • It is formed in small amounts when its anhydride, carbon dioxide (CO₂), dissolves in water.
  • Carbonic acid plays a role in the assembly of caves and cave formations like stalactites and stalagmites.
  • Carbonic acid is widely used in the production of soft drinks, artificially carbonated sparkling wines, and other bubbly beverages.
  • Carbonic acid salts are called bicarbonates (or carbonates of hydrogen), and carbonates.

Additional Information

• Citric acid is an organic compound with the chemical formula HOC(CO₂H)(CH₂CO₂H)₂.
  • Usually encountered as a white solid, it is a weak organic acid. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms.
• Sulfuric acid or sulphuric acid, also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula H_₂SO_₄.
  • It is a colourless, odourless, and viscous liquid that is miscible with water.
• Acetic acid, systematically named ethanoic acid, is an acidic, colourless liquid and organic compound with the chemical formula CH₃COOH.
  • Vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water.
  • Acetic acid is the second simplest carboxylic acid.

The correct answer is option 2 ) Concentrated HCl : Concentrated HNO₃ :: 3 ∶ 1

Key Points

• Aqua regia is a yellow-orange or sometimes red colour fuming liquid.
• Aqua regia is a mixture of hydrochloric acid (HCl) and nitric acid (HNO3) at a ratio of 3:1.
• Aqua regia is made by combining one part concentrated nitric acid (HNO3 ) to three parts concentrated hydrochloric acid (HCl).
• It must be made fresh because it will decompose quickly.

Additional Information

• Uses:
  • ​It is used for the manufacture of chloroauric acid.
  • It can dissolve noble metals such as gold and platinum but not all metals.
  • It is used as an electrolyte in the Wohlwill process to refine gold of the highest quality.

The correct answer is Iron.

Key Points

• Iron is not highly reactive with cold water.
  • It does not react with cold water to liberate hydrogen gas.
  • Iron reacts slowly with steam or hot water to form iron(II) oxide and hydrogen gas.
  • 3Fe + 4H2O → Fe3O4 + 4H2↑

Additional Information

• Potassium is a highly reactive metal and reacts vigorously with cold water to release hydrogen gas and form potassium hydroxide.
  • 2K + 2H2​O → 2KOH + H2​↑
• Calcium is a reactive metal and reacts with cold water to produce calcium hydroxide and hydrogen gas.
  • Ca + 2H2​O → Ca(OH)2​ + H2​↑
• Sodium is a highly reactive metal and reacts vigorously with cold water to liberate hydrogen gas and form sodium hydroxide:
  • 2Na + 2H2​O → 2NaOH + H2​↑

Concept:

Sodium carbonate -

• Sodium carbonate is a salt of carbonic acid with the chemical formula Na2CO3.
• Sodium carbonate is also known as soda ash.
• It is a white powder and an odorless compound in pure form.
• Sodium carbonate is majorly produced by the Solvay process.
• It is a weak acid and a strong base.
• Its pH is 11.
• It is commonly known as washing soda and is used in cleaning products, glass production as a food additive, and more.

Explanation:

→ The valency of sodium (Na) is +1.

→ The valency or charge on carbonate ion (CO₃^2-)is -2.

To make a chemical formula, the valency of both should be balanced, so, for every carbonate ion there should be two sodium cation.

This can be shown as -

Conclusion:

The correct molecular formula for sodium carbonate is Na₂CO₃.

Therefore, the correct answer is option 2.

The answer is option 2

Explanation:-

• Sulphur is found in nature in its elemental form.
• It occurs in volcanic and sedimentary deposits.
• Elemental sulphur is also known as native sulphur or free sulphur.
• The other elements commonly do not exist in their elemental form in nature:

Additional Information

• Iodine: It is primarily obtained from seawater, but it is not naturally found as a free element. It usually is found as part of iodate minerals or in iodide ions.
• Phosphorus: It is never found as a free element in nature due to its extreme reactivity. It's found in minerals and is also an essential part of many biological molecules.
• Magnesium: It is the eighth most abundant element on the earth's crust, but it doesn't naturally occur in the elemental form. It tends to be found in compounds, particularly in minerals such as magnesite and dolomite.

Conclusion:-

So, Sulphur occur freely in nature

Oxidizing agent:

• An oxidizing agent, or oxidant, gains electrons and is reduced in a chemical reaction.
• Also known as the electron acceptor, the oxidizing agent is normally in one of its higher possible oxidation states because it will gain electrons and be reduced.
• Chlorine is used as the oxidizing agent for the purification of water.

Reducing agent:

• A reducing agent, or reductant, loses electrons and is oxidized in a chemical reaction.
• Examples of reducing agents include the earth metals, formic acid, and sulfite compounds
  

Application:

+4 oxidation state of Sn is more stable than the +2 oxidation state.

Therefore Sn2+ can easily oxidize to Sn⁴⁺ and hence SnCl₂.

SnCl₂ + 2Cl → SnCl₄ + 2e

Concept: -

Atomic number

• It plays a very important role in the placement of elements in the modern periodic table.
• It represents the number of protons and hence the number of electrons in an atom.
• The number of electrons in an atom governs its chemical behavior.
• The study of elements has revealed their applicability in different forms.
• The number of protons present in the nucleus of an atom is called the atomic number. It is generally represented by Z.
• It has been established that the charge of a proton is equal to but opposite to that of an electron.
• Since an atom is electrically neutral and neutrons carry no electrical charge, the number of electrons and protons in a neutral atom is the same.
• This implies that the atomic number is equal to the number of protons or the number of electrons in an atom.
• As we know that elements tend to lose or gain electrons during many chemical reactions, and the number of protons is conventionally used to represent the atomic number of an element.
• Hydrogen has an atomic number of one as it has only one proton in its atom.

Explanation: -

Let's Look at the periodic table: -

So, the atomic number of Aluminum, silicon, chlorine, and Magnesium is 13, 14, 17, and 12 respectively.

Conclusion: -

The Atomic Nuber of Phosphorous is 15. So, the atomic number of Cl will be more than Phosphorous.

Hence, the correct option is (3), Chlorine.

Concept:

• If we observe our surroundings, we will see that there is always some transformation occurring, like burning of coal, the formation of clouds, yellowing of leaves, etc. These are called changes.
• Changes, based on their nature can be classified into two types: Physical and Chemical.
• A comparison between chemical and physical changes is as follows:

Explanation:

• Lime water is calcium hydroxide Ca(OH)₂. When we pass carbon dioxide into the solution, the following reaction takes place:

Ca(OH)2 + CO2 → CaCO₃

• Calcium carbonate is formed.
• The formation of calcium carbonate turns the lime water milky.
• This is an example of chemical change because new substances are formed in the process.

Hence, the type of change that occours when CO2 is passed through lime water is Chemical change.

Additional Information

• A process where both chemical and physical change occours is burning of candle.
• Melting of wax is the physical change and production of CO2 is a chemical change.