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The correct answer is Cornea

Key Points

• The cornea is the part of the human eye where the maximum refraction takes place.
• Refraction is the phenomenon which makes image formation possible by the eye as well as by cameras and other systems of lenses. Most of that refraction in the eye takes place at the first surface since the transition from the air into the cornea is the largest change in index of refraction which the light experiences.
• About 80% of the refraction occurs in the cornea and about 20% in the inner crystalline lens.

Additional Information Cornea

• The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.
• The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power. In humans, the refractive power of the cornea is approximately 43 dioptres.
• While the cornea contributes most of the eye's focusing power, its focus is fixed. The curvature of the lens, on the other hand, can be adjusted to "tune" the focus depending upon the object's distance.

The correct answer is Chlorofluorocarbon

Key Points

• Chlorofluorocarbons are the chemicals used as refrigerants, propellants and solid plastic foams.
• Chlorofluorocarbons are nonreactive, non inflammable, nontoxic organic molecules. So they are widely used in refrigerators and air conditioners.

Additional Information

• Chlorofluorocarbons or freons release active chloride, which directly reacts with ozone and breaks it into oxygen and more of chloride or hypochlorite ion.
• Hole in the ozone shield over antarctic region has widened due to the use of these chemicals.
• The depletion of ozone can increase the amount of ultraviolet radiations reaching the earth.

The correct answer is  India and Pakistan

Key Points

• The Radcliffe Line demarcates the borders between India and Pakistan.
• On 17 August 1947, the borderline that separated India from Pakistan, known as the Radcliffe Line was revealed.
• The Radcliffe line is spread through the Rann of Kutch in Gujarat to the international border in Jammu in Jammu & Kashmir.
• Dividing India and Pakistan into two different countries.
• Radcliffe divided India into three halves:
• West Pakistan.
• East Pakistan.
• India.
• On this day, the line demarcating India from the newly formed Pakistan after partition was published.
• It was named after the chairman of the Border Commission, Sir Cyril Radcliffe.
• He was a lawyer from England who had no previous knowledge or experience with cartography.
• This borderline is today the international boundary between India and Pakistan on the western side and between India and Bangladesh on the eastern side. Before independence, it was decided to partition India into India and Pakistan for the Hindu and Muslim communities respectively.

Additional Information

India shares land borders with seven countries including Bhutan, Bangladesh, China, Afghanistan, Myanmar, Nepal, and Pakistan and maritime borders with Sri Lanka, Maldives and Indonesia.

Confusion PointsAfter the partition of India in 1947, the Radcliffe line became the border between India and East Pakistan and following the liberation of Bangladesh in 1971, the same line became the border between India and Bangladesh. The Bangladesh–India border, known locally as the Radcliffe line (IB).

The correct answer is Rashtrakuta

Key Points

• Sulaiman, an Arab traveller, visited Amoghavarsa's court in AD 851.
• Sulaiman conferred the Rashtrakuta kingdom to be 'among the four great sovereigns (powers) of the world - equal to the Caliph of Baghdad and emperors of China and Turkey" and confired the status of 'Balhar'.
• He wrote that the Rashtrakuta kingdom had reached its zenith under Amoghvarsa's rule.

The correct answer is Gorgaburu 

Key Points

• Gorgaburu is the second highest peak of Ajodhya Hills at an altitude of 677 meters.
• The Chamtaburu  is highest peak of southern West Bengal altitude of 712  meters.
• It is the highest point of the southern part of West Bengal and the second highest in the state.
• It is located at Western plateau and highlands of Purulia district in West Bengal.

Additional Information

• Ajodhya Hills, is a small plateau with hilly surroundings located in the Purulia district of the state West Bengal, India.
• It is the easternmost part of the Chhotanagpur Plateau and extended part of Eastern Ghats range.

The correct answer is Copper and Tin

Key Points

• Bronze is an alloy of Tin and copper.
• It is composed of approximately 88% copper and 12% tin.
• This metal alloy has a reddish-brown colour with a melting point that ranges from 950°C – 1050°C.
• The principal function of the tin is to strengthen the bronze to increase the load-holding capacity, resistance, and ability to withstand corrosion.
• There are different kinds of bronze, including architectural bronze, commercial bronze, plastic bronze, silicon bronze, aluminum bronze, manganese bronze, etc.

Additional Information Properties

• They are highly ductile and brittle in nature.
• It has low friction against other metals.
• Most of the alloys of the bronze expand when it solidifies.
• Bronze is fusible and hence convenient for casting.

Uses

• Bronze and its alloys are used for industrial applications.
• They are used in the production of coins, jewellery, locks, hinges, automobile radiator, engineering materials, etc.

The correct answer is F-

Key Points

• Isoelectronic means species with same number of electrons.
• The ion of oxygen with -2 charge will be isoelectronic with F-.
• This is so because the atomic number of fluorine is 9 and here its ion has -1 negative charge this means it has gained one electron. And we know that the atomic number is equal to the number of protons and number of protons is equal to the number of electrons. So now it has total 10 electrons.
• The atomic number of oxygen is 8. So, similarly, it has total 10 electrons.
• Since, the total number of electrons in F-and O2- is 10, therefore they are isoelectronic species.

The correct answer is Gokhale

Key Points

• The Servants of India Society was formed in Pune, Maharashtra, on June 12, 1905 by Gopal Krishna Gokhale, who left the Deccan Education Society to form this association.
• The aim of ‘The Servants of Indian Society’ was to train national missionaries for service to India and promote the true interests of the Indian people by constitutional means alone.

Additional Information

 Servants of India Society

• Servants of India Society was founded on 12 June, 1905 by Gopal Krishna Gokhale, with the support of dedicated individuals like Gopal Krishna Deodhar, Anant Patwardhan, Natesh Appaji Dravid and so on.
• It was the country's first secular organization dedicated to the disadvantaged, rural and tribal peoples, emergency relief work, literacy, and other social issues.
• Members go through a five-year training period and agree to serve on extremely modest salaries.
• These workers must take a renunciation pledge, renounce any selfish needs, pride, or fame, and become one with their work and responsibilities.
• The organization has its headquarters in Pune (Poona) and branches in Chennai (Madras), Mumbai (Bombay), Allahabad, Nagpur, and other locales.
• Though its membership has diminished over time, the society has remained important in its demonstration of social service ideas.

The correct answer is Bird.

Key Points

• The scientific study of birds is called Ornithology.
• Ornithology is a Latin term that translates to “bird science”.
• The study also constitutes the natural history of birds and aims to study the ecology and biogeography of avifauna in forests.
• The collection of bird skins and eggs, along with photography, contributes to the study of Ornithology.
• Furthermore, there are a few special categories that make up the field of Ornithology.
• These include anatomy, taxonomy and ecology lifestyle.

The correct answer is E.

Explanation:

There are 3 married couples.

A, C and E are husbands.

Since, B is not wife of A and B and C are cousins.

Then it is clear that B is wife of E.

Hence, E is the husband of B.