UPSC 1996 Prelims Questions with Answers

Explanation

DNA damage and permanent mutations are likely in professionals exposed to mutagenic agents like radiation, toxic chemicals, or hazardous environments.

Statement 1 is correct: Researchers using Carbon-14 isotopes are exposed to beta radiation from the radioactive isotope. Prolonged exposure can damage DNA and increase the risk of mutations.

Statement 2 is correct: X-ray technicians are at risk due to ionizing radiation, which can break DNA strands and cause chromosomal abnormalities. Protective measures like lead aprons are essential to minimize exposure.

Statement 3 is incorrect: While coal miners are exposed to harmful substances like coal dust and radon gas, these hazards are more strongly linked to respiratory diseases (e.g., black lung disease) and lung cancer, rather than direct, widespread DNA changes. Hence, it may not be included as a primary factor for widespread DNA changes.

Statement 4 is correct: Chemicals found in dyes and paints, such as benzene and lead-based compounds, can be harmful. They can cause cell damage and increase the risk of DNA changes. Long-term exposure is linked to a higher risk of cancer.

Explanation

Arthashastra, attributed to Kautilya, contains provisions related to social and economic aspects, including marriage and divorce. According to Arthashastra, a wife deserted by her husband had the legal right to seek divorce and remarry. If a man abandoned his wife without valid reason then she could remarry after waiting for a certain period. It also mentions conditions under which a woman could remarry if her husband was missing, dead, or had become a renunciate (ascetic).

Explanation

Nastaliq is a highly stylized Persian script, known for its fluid and elegant appearance. Introduced to India during the Delhi Sultanate and Mughal periods, it was widely used in manuscripts, poetry, and royal decrees. This script reflects the cultural fusion of Persian and Indian traditions, particularly under the Mughal Empire. It remains a hallmark of Islamic calligraphy and is still used in Persian and Urdu writing today.

Explanation

Sufism is the mystical branch of Islam that emphasizes inner spiritual development, seeking a direct connection with God through meditation, poetry, and devotion. Sufis are often part of "orders" called tariqa, which are congregations centered around a grand master wali. These orders trace their teachings through a lineage of successive teachers, ultimately connecting back to the Islamic prophet Muhammad. Khwaja Muin-ud-din Chisti, founder of the Chishti Sufi order in India, emphasized the use of sama (devotional music) as a means of spiritual connection with God. He believed that music, when performed with pure devotion, could elevate the soul and foster closeness to the divine. This practice became central to Chishti gatherings, inspiring spiritual ecstasy. While Baba Farid and Sayyid Muhammad Gesudaraz focused more on spiritual teachings and community service, the tradition of sama continues today at Muin-ud-din Chisti’s dargah in Ajmer.

Explanation

The term "boycott" originates from the name of Captain Charles Boycott, a British land agent in Ireland. In 1880, Irish tenants protested against his harsh treatment by refusing to cooperate with him or work on his land. This form of non-cooperation was later adopted globally as a political tool of protest. The other terms: Gherao, Bandh, and Hartal are not derived from personal names.

Explanation

Statement 1 is correct: Lack of education and knowledge about modern farming techniques can lead to lower productivity as farmers may not adopt modern farming techniques, use improved seeds, or utilize fertilizers and pesticides effectively. This results in low yields, which in turn lead to reduced in-comes for farmers, further contributing to the income disparity between rural and urban areas.

Statement 2 is correct: Primary products like agricultural commodities generally have lower prices than manufactured goods, which are produced in urban areas. This disparity in pricing contributes to the wage gap between rural and urban incomes.

Statement 3 is correct: The industrial sector in India has received more investment than agriculture, leading to better infrastructure, technological advancements, and higher wages in urban areas. This has resulted in significant income disparities, with urban incomes being about twice as high as those in rural areas. Urban regions benefit from better infrastructure and technology, driving higher productivity and wages. In contrast, rural areas face underinvestment, limiting their growth and widening the income gap.

Explanation

The Supreme Court of India, in the Bijoe Emmanuel case (1986), ruled that no one can be compelled to sing the National Anthem as it violates Fundamental Rights.

Statement 1 is correct: The Supreme Court emphasized the importance of Article 19(1)(a) of the Indian Constitution, which guarantees the right to freedom of speech and expression. It ruled that the right to freedom of speech and expression is not limited to spoken words but also includes silence.

Statement 2 is correct: If someone refuses to sing due to religious beliefs, forcing them violates their right to freedom of conscience and religion.

Statement 3 is correct: There is no legal provision in Indian law that mandates individuals to sing the National Anthem. Respect for the anthem is required, but singing it is not obligatory.

Explanation

The Ionosphere ranges from approximately 60 kilometers (37 miles) to 1,000 kilometers (620 miles) above the Earth. It is characterized by the presence of ions and free electrons. These electrically charged particles are created by solar radiation (primarily ultraviolet and X-rays) that ionizes the atmospheric gases. The ionosphere plays a crucial role in radio wave propagation. It contains several layers (D, E, F1, and F2), each with varying densities of ions and electrons. These layers can reflect radio waves, allowing them to travel far beyond the horizon. The ability of the ionosphere to reflect radio waves depends on the frequency of the radio waves and the state of the ionosphere (which varies with time of day and solar activity).

Explanation

Option (a) is correct:

Assertion (A) is true: The regions near the equator (such as the tropics) generally receive consistent rainfall through-out the year. This is due to the Intertropical Convergence Zone (ITCZ), where the trade winds from both hemispheres converge, leading to frequent cloud formation and rain. The high temperatures and constant moisture availability near the equator contribute to year-round rainfall. Reason (R) is true: In equatorial regions, intense solar heating during the day warms the Earth’s surface, causing water to evaporate and warm, moist air to rise. As the air ascends, it cools, leading to the condensation of water vapor and the formation of cumulonimbus clouds. This process triggers convectional rainfall, which typically occurs in the afternoon. R is the correct explanation of A: The high temperatures and humidity near the equator lead to convectional rainfall, which contributes to the consistent precipitation observed throughout the year in equatorial regions.

Explanation

The four yugas--Krita (Satya), Treta, Dvapara, and Kali--form a cyclical model in Hindu cosmology, depicting a gradual decline in virtue and dharma over time. A full Yuga cycle lasts 4,320,000 years (12,000 divine years), and a Kalpa, or epoch, consists of a thousand such cycles.

Option (c) is correct: Based on Yuga Duration Table given below:

Yuga Duration (in years) Krita (Satya) 1,728,000 years (4,800 divine years) Treta 1,296,000 years (3,600 divine years) Dvapara 864,000 years (2,400 divine years) Kali 432,000 years (1,200 divine years)