Indian Army Agniveer Technical Mock Test - 2 - Indian Army Agniveer MCQ

The correct answer is South Africa.Key Points

• Mahatma Gandhi returned to India in the year 1915, from South Africa.

Mahatma Gandhi:

• He was Born on 2 October 1869.
• He died on 30 January 1948.
• He was undoubtedly a great man, both in personal force and in political effect.
• He was an Indian Lawyer, politician, social activist, and writer who molded the character of the struggle for freedom in India, and impressed his own ideals upon the new governing class that came into power when the English went home.
• Mahatma Gandhi returned to India from South Africa on 9 January 1915 at the request of Gopal Krishna Gokhale.
• After arriving in India, Mahatma Gandhi successfully organized Satyagraha Movements in various places.
• Gandhiji's return from South Africa can be seen as perfect timing for the future development of the Indian national movement.
• Gokhale helped Gandhiji at the time of hardships in raising funds when Gandhiji was in South Africa.
• Gokhale insisted to Gandhiji that he had been far away from his nation.
• He wanted Gandhiji to come to India and know the situation in India under British Rule.

The logic follows here is :

• The pentagon is rotated clockwise 90 degrees and the figure is cut in the opposite sense as in figure R.

Similarly,

• The two parallel lines are rotated anti-clockwise 90 degrees without orientation and the dot is taken out of the figure and replaced with a circle.

Therefore, the figure with all those arrangements can be seen in ‘figure C.’

Hence, the correct answer is “Option (3).”

The correct answer is North-East.

Key Points

• The Tripuri people of the Bru Reang tribe perform the folk dance known as hojagiri.
• It is performed in the state of Tripura, India.
• A team of four to six ladies and young girls do it while singing, balancing on an earthen pitcher, and controlling various props like a bottle on top of the head and an earthen lamp in one hand.
• while the body is only moved in the lower half.
• Other folk dances of North-East:
  • Garia, Jhum, Maimita, Masak Sumani and Lebang boomani dances of Tripuri community,
  • Bijhu dance of Chakma community,
  • Cheraw and Welcome dances of the Lusai community
  • Hai-Hak dance of the Malsum community,
  • Wangala dance of Garo Community.

Additional Information

The correct answer is Aravalli.

Key Points

• Aravalli Mountain Range is Pre Cambrian range fold mountain range.
• It is one of the oldest mountain ranges in the world.
• It starts from Girnar, Gujrat, and extends up to Delhi covering Rajasthan and Haryana.
• Its total length is 692 Kms and from this 550 km is located in Rajasthan. Guru Shikhar in Sirohi, Rajasthan is the highest peak of the Aravalli Mountain Range.
• The hidden limb of the Aravallis that extends from Delhi to Haridwar creates a divide between the drainage of rivers of the Ganga and the Indus Rivers.

Important Points

• The Tian Shan is a mountain range located in Central Asia. Its highest peak is Jengish Chokusu. It is spread in China, Kazakhstan, Krygyzstan, Uzbekistan, and Tajikistan.
• Satpura Range is a mountain range located in MP and Maharashtra. Its highest peak is Dhupgarh.
• The Alps is a mountain range of Europe. Mont Blanc is the highest peak of this range.

The correct answer is Gomukh.

Key Points

Ganges

• The Ganges, known locally as the Ganga, is a major river in the Indian subcontinent, originating from the Gangotri Glacier at Gomukh, Uttarakhand.
• The river initially flows as the Bhagirathi, which merges with the Alaknanda at Devprayag to officially start the Ganges.
• Covering 2,525 km, the Ganges traverses several states in India, ultimately flowing into Bangladesh.
• Upon reaching West Bengal, the Ganges bifurcates into the Hooghly River (which flows into India) and the Padma River (flowing into Bangladesh).
• Principal Ganges tributaries on the left bank include the Ramganga, Garra, Gomti, Ghaghara, Gandaki, Burhi Gandak, Koshi, and Mahananda.
• Principal right bank tributaries of the Ganges include the Yamuna, Son, Punpun, and Damodar.
• The Ganges and its tributaries support millions of livelihoods and contribute significantly to the agricultural and industrial sectors of the region.
• The river system has high spiritual and religious importance in Hinduism, symbolizing purification to many devotees.

Tehri Dam

• The Tehri Dam, located in the Tehri Garhwal district of Uttarakhand, India, is the tallest dam in the country and the 12th tallest in the world.
• It's an earth and rock-fill embankment dam situated on the Bhagirathi River near Tehri

Additional Information

Major tributaries of the Ganges are.

• Yamuna
  • ​The Yamuna River is the largest tributary of the Ganga River.
  • It originates from the Yamunotri glacier, at the Bandarpoonch peak in Uttarakhand.
  • The main tributaries joining the river include the Hindon, Betwa Ken, and Chambal.
  • The Tons is the largest tributary of the Yamuna.
• Son
  • The river originates near Amarkantak in the Anuppur district of Madhya Pradesh.
  • The Gondwana coal is found near its bank.
  • It belongs to the carboniferous period(570-245 million years).
  • It contains 60-90% bituminous or anthracite.
  • The coal is also found near the banks of the Narmada, Mahanadi, and Godavari rivers.
  • The Indrapuri Barrage was constructed in 1968.
  • The Bansagar Dam in Madhya Pradesh was commissioned in 2008.
• Damodar
  • ​Damodar River has a rift valley due to downwarping.
  • It originates from the Chota Nagpur Plateau. It flows in the states of Jharkhand and West Bengal.
  • It drains into the river Hoogly.
  • It is called as ‘Sorrow of Bengal’.
• Damodar Vally Corporation
  • The DVC was established in July 1948 as the first multipurpose river valley project in India.
  • It was modeled after the Tennessee Valley Authority in the U.S. with the primary aim of controlling flooding, providing irrigation, and generating hydroelectric power.
  • Aside from flood control and power generation, the DVC has broadened its operational scope to include various services like providing consultancy services, managing contracts, reforestation, and organizing public health and agricultural development initiatives.
  • Panchet Dam: Panchet Dam, located on the border of West Bengal and Jharkhand, serves both electricity generation and irrigation purposes. It was the last of the four multi-purpose dams included in the first phase of the Damodar Valley Corporation (DVC) projects.
  • Konar Dam: Located on the Konar River, a tributary of the Damodar River, the Konar Dam is the second of the four major dams constructed as part of the DVC project. The dam is used for water storage, irrigation, and flood control.
  • Maithon Dam: This dam, near Maithon town in Jharkhand, has a unique underground power station. It serves for flood control, as well as irrigation and power generation.
  • Tilaiya Dam: Constructed across the Barakar River, a tributary of the Damodar, the Tilaiya Dam is the first dam and hydroelectric power station constructed by the DVC. Located in Koderma district in Jharkhand, it serves multiple purposes including flood control and power generation.

Kosi

• The Kosi River, also known as Saptakoshi for its seven Himalayan tributaries, flows through the countries of China, Nepal, and India.
• This river drains from the northern slopes of the Himalayas in Tibet and the southern slopes of Nepal.
• The Kosi River often changes its course and is therefore known as the "Sorrow of Bihar" because of its frequent floods affecting the Indian state of Bihar.
• The Kosi Project, an agreement between the governments of Bihar and Nepal, was initiated in 1954 to manage these frequent floods. The project included the construction of a barrage near Hanumannagar in Nepal and the building of embankments along portions of the river.

We complete the given figure with symmetrical lines:

Now we compare the given options:

Option 1) There is an extra line in the figure.

Option 2) The figure is correct.

Option 3) There is an extra line in the figure.

Option 4) There is an extra line in the figure.

Hence the correct answer is option 2)

The logic follows here is :-

From the given words we can understand that it is the process of a newspaper.

Information → Verifying → Editing → Printing → Publishing

So, logical and meaningful order is 2 - 4 - 5 - 3 - 1.

Thus, the correct answer is "2 - 4 - 5 - 3 - 1".

Given:

cosec θ = 1(7/22)

Concept used:

Cotθ = Base/perpendicular

Calculation:

Here

cosec θ = 1(7/22)

cosec θ = 29 / 22

Then Base will be ,

⇒ √(29² - 22² )

⇒ √(29 - 22 ) (29 + 22)

⇒ √(7 ×51) = √(357)

So Cotθ = √(357) / 22

∴ The correct option is 2

Concept Used:

Probaility = (Number of favorable outcomes)/(Sample space)

Calculation:

The numbers which are multiples of 3 are 3 and 6. These two numbers appear on the faces of the dice. Therefore, there are 2 favorable outcomes.

The total number of possible outcomes is 6 because the dice has 6 faces.

Therefore, the probability of getting a multiple of 3 when an unbiased dice is thrown is:

Favorable outcomes / Total outcomes = 2 / 6 = 1 / 3

∴ The probability of getting a multiple of 3 is 1/3.

Concept:

• cos 2x = 2cos2x - 1 = 1 - 2 sin²x
• 

Calculation:

Given,

⇒

⇒

⇒

⇒

⇒

∴ The correct answer is option (3).

Explanation:

Composition of function.

When the function f(x) is substituted in the function g(x), the composite function formed is represented by (g o f)x. It can be termed as “g of f of x".

(g o f)x=g(f(x))

We have f(x) =  and g(x) = x + 2.

Now, f()= =  = 1

∴ (g o f)

= g(f())

= g(1)

= 1+2

= 3

Solution:

When two dice are thrown together, then the total number of all possible outcomes

{(1,1) (1,2) (1,3) (1,4) (1,5) (1,6)

(2,1) (2,2) (2,3) (2,4) (2,5) (2,6)

(3,1) (3,2) (3,3) (3,4) (3,5) (3,6)

(4,1) (4,2) (4,3) (4,4) (4,5) (4,6)

(5,1) (5,2) (5,3) (5,4) (5,5) (5,6)

(6,1) (6,2) (6,3) (6,4) (6,5) (6,6)}

∴ n(S) = 6 × 6 = 36

The favorable outcome of getting the same number on both dice is:

(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6).

∴ The number of favorable outcomes = 6

∴ Required probability =

Concept:

Principal value of cosec^-1θ is

cosec[cosec^-1x] = x

Calculation:

Let,

y =

⇒ cosec y = - √2

⇒ cosec y = cosec(−π4)

∴ Principal value is −π4.

Additional Information
Principal Values of Inverse Trigonometric Functions:

Formula used:

Calculation:

Let

y =

⇒ y =

Using the formula discussed above

⇒ y = e⁵

∴ The required value is e^5.

Concept:

........(equation 1)

.......(equation 2)

Explanation:

We are given C(n, r) +2C(n, r - 1) + C(n, r - 2) i.e.

⇒ C(n, r) +2C(n, r - 1) + C(n, r - 2)

⇒

⇒  (Using equation 1 and 2)

⇒

⇒ C(n + 2, r)

CONCEPT:

• A sound is a form of energy that produces a sensation of hearing in our ears, It is a kind of disturbance that travels through a medium due to repeated vibrations of the particles of the medium about their mean positions.
• The disturbance is handed over from one particle to the next, whereas sound waves travel in straight lines directly outwards from their source in the form of compression and rarefaction.
• It is considered a mechanical wave since sound requires a medium for its propagation and it cannot propagate in a vacuum, also the velocity of sound will increase with an increase in the density of the medium
• Wavelength (λ) is equal to the distance traveled by the wave during the time in which any one particle of the medium completes one vibration about its mean position. It is the length of one wave.
• The frequency (n) of vibration of a particle is defined as the number of vibrations completed by a particle in one second. It is the number of complete wavelengths traversed by the wave in one second.

The relation between velocity, frequency, and wavelength can be expressed as

⇒ v = n x λ

Calculation:
Given:
v = 450 m/sec n = 1500 Hz

⇒ v = n x λ

The correct answer is Fuse.

Key Points

• Fuse is an electrical safety device used to protect an electrical or electronic device from over currents.
• The electric fuse is connected to the live wire.
• When the current above the rated value of the fuse flows through the fuse, the heat generated will cause the fuse wire to melt, thereby breaking the connection.
  • An electric fuse is a protective device that protects electrical equipment in the circuit by breaking the circuit when there is a short circuit.
  • It contains a fuse wire which has a low melting point, it allows normal current to pass through it safely but if there is any short circuit fuse wire can’t withstand the heat produced by that current (infinite current) so it melts and breaks the circuit
  • Hence fuse wire used to have a low melting point and high resistance to avoid overload or short circuit.
  • Whereas the fuse rating of electrical fuse is the maximum amount of current can pass through it without melting the fuse wire.

Additional Information

• The material used for fuse elements must be of:
  • Low melting point, low ohmic loss.
  • High resistivity.
  • Low cost and free from detraction.
  • The material used for making fuse element has a low melting point such as tin, lead, or zinc.
  • A low melting point is, however, available with a high specific resistance metal.
  • The material mainly used for fuse elements are tin, lead, silver, copper, zinc, aluminium, and an alloy of lead and tin.

The correct answer is Mac.

Key Points

• Supersonic Speed -
  • When the speed of sound is greater than Mach 1.3 and less than Mach 5.0, that speed will be supersonic speed.
  • which is approximately equal to the speed of sound.
• The speed five times the speed of sound (Mach 5) is called hypersonic speed.
• Mach number -
  • It is the ratio of the speed of a body in a medium to the effect of pressure and temperature on sound.

Additional Information

• ​Hertz -
  • It is the unit of the International System of Units (SI) of frequency.
• Not -
  • It is the unit of speed.
  • It is equal to one nautical mile per hour.​
• Richter -
  • It is a mathematical scale for measuring the intensity of earthquake waves.

• The Planck’s constant (h) is a proportionality constant that relates the energy of a photon to the frequency of its associated electromagnetic wave.
• The Planck’s constant is equal to approximately 6.626176 x 10^-34 joule-seconds.
• The dimensions of Planck's constant are the same as those of angular momentum.

The correct answer is To produce the necessary centripetal force.

Key Points

The outer part of a railway track near the bend or a curve is generally raised, i.e., the outer track of the bend is slightly higher than the inner. This is known as , the following three kinds of force act on it:

1. The weight of the train acting vertically downwards,
2. The normal reaction provided by the track, acting upwards, to support the weight of the train, and
3. The frictional force acting between the contact area of wheels and the track surface helps the train move forward.

When a fast-moving train takes a curved path, it tends to move away tangentially off the track. In order to prevent this, the curved tracks are banked on the outside to produce the necessary additional force termed as centripetal force, which is required to keep the train moving in a curved path. If there is no banking of the track, this centripetal force that is obtained from the friction between the rim of the wheels and rails which is generally small may cause the train to jump off the rails.

So that railway tracks are banked on curves, so that necessary centripetal force may be obtained from the horizontal component & weight of the train

The correct answer is Silver.Key Points

• Silver is a chemical element with an atomic number 47.
• Silver is the best conductor of electricity.
• Gold and silver can be separated by the cyanide process.
• Siver can be produced as a byproduct of copper, gold, lead, and zinc refining.
• Silver exhibits the highest electrical conductivity, thermal conductivity among metals.

Additional Information

• One such chemical element is sodium.
  • It is an efficient heat and electricity conductor.
• Iron is atomic number 26 and has the symbol Fe.
  • Iron has a thermal conductivity of 73 at ambient temperature.
• Gold's atomic number is 79 and its symbol is Au.
  • Compared to silver, gold is more heat resistant and has a higher melting point.

The correct answer is Cataract.

Key Points

• A cataract is a clouding of the lens, which prevents a clear, sharp image from being produced.
• A cataract forms because the lens is sealed in a capsule and as old cells die they get trapped in the capsule, with time this causes a clouding over of the lens, this clouding results in blurred images.

Additional Information

• Presbyopia:
  • The power of accommodation of the eye usually decreases with aging.
  • For most people, the near point gradually recedes away.
  • They find it difficult to see nearby objects comfortably and distinctly without corrective eye-glasses.
  • This defect is called presbyopia.
  • It arises due to the gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens.
• Hypermetropia:
  • Hypermetropia is also known as far-sightedness.
  • A person with hypermetropia can see distant objects clearly but cannot see nearby objects distinctly.
  • This defect can be corrected by using a convex lens of appropriate power.
• Myopia:
  • Myopia is also known as near-sightedness.
  • A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.
  • A person with this defect has the far point nearer than infinity. Such a person may see clearly up to a distance of a few meters.
  • In a myopic eye, the image of a distant object is formed in front of the retina and not at the retina itself.
  • This defect can be corrected by using a concave lens of suitable power.

The correct answer Van der Waals force

Key Points

• Van Der Waals Forces
  • Van der Waals force is nothing but a distance-dependent molecular interplay that exists in almost every matter. This feeble molecular interaction is more susceptible to destruction. If two molecules are situated over a long distance, then no Van der Waals force remains active between them, which means the activeness of the force is bound into a certain range of distance. The picture shown below represents Van der Waals force very well.
• Types of Van Der Waals Forces
  • Vanderwaal force is a combination of three interactions. They are explained below:
• Keesom Interactions
  • When two polar molecules come together, then one’s negative end attracts the other's positive end. This attraction is refered to as Keesom interaction.
• Keesom
  • According to the image, Cl is electronegative and hence attracts a bonding electron cloud towards itself, creating a negative end on it. The neighbouring Hydrogen Chloride comes in the vicinity of the previous negative pole, which means the chlorine end attracts the Hydrogen end of the second molecule.
• Debye Forces
  • Debye force is a molecular phenomenon in which reciprocity awakening between two molecules having symmetrical charge distribution. To get better knowledge of this one has to be clear about the idea of charge distribution of molecules.
• Debeye
  • Ar is a symmetrically charge distributed atom as its valence shell is totally occupied by electrons. When it comes in close distance with HCl. The electronegative element chlorine attracts Ar containing electron clouds that leads to the generation of debye interaction.
  • London Dispersion Forces
• According to the Bohr atomic model, electrons disperse around the nucleus. The negative charge density (rise due to assembly of electrons) is also arranged in a different way, varying the capacity of the charge distribution of one atom’s nucleus. London dispersion force generates between the atoms which have symmetrical charge distribution around their nucleus.

The correct answer is Radium.

Key Points

• Elements of Group 1 are called Alkali metals.
• Alkali metal is a part of s block elements.
• Being metal they all exhibit electropositive character.
• By losing their 1 valence electron they show a valency of +1.
• Members of this family include Hydrogen, Lithium, Sodium, Potassium, Rubidium, Cesium, and Francium.
• Sodium and Potassium are soft metals whereas Francium is radioactive.

Additional Information

• Hydrogen is the only non-metal present in Group 1 of the Modern Periodic Table.
• The vertical columns in the periodic table are called a group and the horizontal row is called a period.
• There are 18 Groups and 7 periods in the modern periodic table.

The correct answer is [Ar]3d104s1.

Key Points

• Copper (Cu):-
  • It is a transition metal with atomic number 29.
  • The correct electronic configuration of Cu is [Ar]3d104s1.
  • The electronic configuration of Cu can be determined by filling electrons in the increasing order of energy levels and orbitals.
  • Cu has a unique electronic configuration due to the presence of a completely filled d-orbital, which gives it stability and makes it less reactive.

Additional Information

• [Ar]3d⁹4s²:-
  • It represents the electronic configuration of Sc (scandium) and Option 2 [Kr]3d94s2 represents the electronic configuration of Cd (cadmium).

The correct answer is Magnesium.

• Kieserite is the ore of Magnesium.
• Other ores are Magnesite, Dolomite, Epsom Salt, and carnalite.

Additional Information

A list of important metals with ores is as follows:

The correct answer is all of these

Explanation:-

• Single atoms mean that the substance consists of unbound, standalone atoms rather than molecules, which are two or more atoms bonded together.
• Helium (He), Neon (Ne), and Argon (Ar) are all examples of noble gases. These elements are located in Group 18 (VIII) of the periodic table and are known for their low reactivity.
• This low reactivity is due to their full valence electron shell, which generally makes them very stable and not prone to form bonds with other atoms. As such, they exist as single atoms in their elemental form.
• Therefore, helium, neon, and argon all exist naturally as single atoms. Under normal conditions, they do not form molecules with each other or atoms of other elements because they are already at a low potential energy state.
• Elements like Argon, Helium and other noble gases can exist as a single atom because a single atom of noble particle satisfy the necessary condition of molecule, that it is capable to exist independently and it show all property of that noble gas
• These gases are often used in situations where reactions are undesirable. For example, neon lights work by passing an electric current through neon gas, causing it to emit light, with no chemical reaction involved.

Conclusion:-

In conclusion, helium, neon, and argon are all noble gases. They are composed of single, unbound atoms due to their full electron shells making them mostly unreactive and stable.

The correct answer is Oxidizing.

Key Points

• Potassium permanganate (KMnO₄) is a strong oxidizing agent that oxidizes dissolved impurities from water such as iron, manganese, and hydrogen sulfide (H₂S) by converting them into solid particles.
• These impurities are then filtered out of the water.
• It is a salt consisting of K⁺ and MnO^{− 4} ions.
• It is a strong oxidizing agent.
• It is used as a medication for cleaning wounds and dermatitis.

​Additional Information

• Some other chemical disinfectants used for water:
  • Hypo chloride
  • Chlorine dioxide
  • Chlorine
  • Hydrogen peroxide
  • Potassium permanganate
  • Gamma rays
  • Ultraviolet light

The correct answer is Magnesium hydroxide.

Key Points

• Magnesium Hydroxide (Mg(OH)2):
  • It is a white coloured substance, slightly soluble in water.
  • A suspension of Mg(OH)2 in water is called Milk of magnesia.
  • It is used as an antacid for neutralising acid wastewater.
  • It is also used in the treatment of scalp's dandruff.

Additional Information