NTSE/CBSE (S.Science) - 7

The USSR joined the League of Nations on September 18, 1934, after being excluded since the League's formation in 1919 following the Russian Revolution. This admission was part of the League's attempt to broaden its membership and strengthen collective security. 1935 and 1936 are incorrect years.

Tripura is a northeastern state of India that is surrounded by Bangladesh on three sides (north, south, and west), with only its eastern side connecting to Assam and Mizoram. This unique geographical position makes it almost an enclave within Bangladesh. Assam, Sikkim, and other northeastern states do not have this three-sided boundary with Bangladesh.

India's foreign policy is fundamentally based on non-alignment - not joining any military bloc during the Cold War. Option A directly states this principle. Option B 'independent views' is related but non-alignment is the official term. Option C 'both' is misleading because independent views is not a separate formal doctrine - it's inherent to non-alignment.

China is the world's largest rice producer, followed by India as the second-largest. Both countries cultivate rice extensively due to favorable climatic conditions and large agricultural populations. USA and Russia are not major rice producers compared to Asian countries. This has been consistent for decades.

Dr. Annie Besant was appointed the leader of the Home Rule League in 1916, specifically leading the All India Home Rule League based in Madras. She, along with Bal Gangadhar Tilak, started the Home Rule Movement demanding self-governance for India. Mahatma Gandhi was not directly involved in leading the Home Rule League - he focused on other movements like Champaran, Kheda, and Non-Cooperation.

World War I (1914-1918) marked the end of European supremacy by devastating European economies, destroying empires, and shifting power to the United States. The war bankrupted European nations, led to the decline of colonial powers, and established the US as a creditor nation. It did not strengthen USSR (which emerged from the Russian Revolution during WWI) nor establish immediate US supremacy (that came later).

NHPC (National Hydro Electric Power Corporation Limited) was established in 1975 as a Central Public Sector Undertaking under the Ministry of Power, Government of India. Its mandate is to develop hydroelectric power in India. 1971 and 1973 are incorrect years - the corporation was formed later as part of India's focus on infrastructure development.

Arunachal Pradesh has the lowest population density among Indian states due to its mountainous terrain, remote location, and large forest area. While it has significant land area, the population is sparse compared to other states. Meghalaya and Sikkim have higher densities. The typo 'Skkim' in option C should be 'Sikkim'.

Petroleum (crude oil and products) is India's largest import item by value, accounting for a significant portion of the import bill due to India's substantial domestic demand and limited domestic production. India imports over 80% of its crude oil requirements. Chemical products and iron/steel are major imports but don't match petroleum's volume and value.

Kolar Gold Fields (KGF) in Karnataka is India's richest, deepest (over 3 km), and oldest gold mine, operating for over 120 years. It produced significant gold quantities until its closure in 2001. Golconda is famous for diamonds, not gold. Nellore is not known for gold mining. KGF remains legendary in India's mining history.

The Preamble has been amended only once by the 42nd Constitutional Amendment of 1976, which added the words 'socialist,' 'secular,' and 'integrity.' The words 'Unity of the Nation' were changed to 'Unity and integrity of the Nation.' No other amendments have been made to the Preamble since.

Sales tax is an indirect tax because it is levied on goods and services, and the economic burden can be shifted from the seller to the consumer through higher prices. In contrast, gift tax and wealth tax are direct taxes where the person paying the tax cannot shift the burden to another person.

The WTO officially came into existence on January 1, 1995, replacing the General Agreement on Tariffs and Trade (GATT) as the global international organization overseeing trade rules between nations. The Marrakesh Agreement, which established the WTO, was signed in April 1994 and came into effect on January 1, 1995.

The Chinese writing system is ideographic, where characters represent ideas or concepts rather than just sounds. Each character typically carries meaning and can stand alone as a word. This distinguishes Chinese from purely phonographic or alphabetic scripts where symbols primarily represent speech sounds. While early Chinese characters had pictographic origins, the modern system is fundamentally ideographic.

Archaeologists are scientists who study human history and prehistory through the excavation and analysis of artifacts, structures, and other physical remains. They dig up old sites to uncover information about past civilizations, cultures, and human activities. Geologists study rocks and earth processes, while historians primarily work with written records.

President's Rule is imposed in a state under Article 356 of the Constitution when the state government cannot function according to the Constitution. This happens when the Constitutional machinery in the state breaks down. The President assumes all functions of the state government and the state legislature is either suspended or dissolved. Article 352 relates to National Emergency, and Article 358 deals with suspension of Fundamental Rights during emergency.

Jharkhand was officially declared a state on November 15, 2000, becoming the 28th state of India. It was carved out of the southern part of Bihar. The date November 15 was chosen because it is the birth anniversary of tribal leader Birsa Munda, who is a significant figure in Jharkhand's history. The Bihar Reorganization Act, 2000 facilitated the creation of the new state.

Singapore consistently ranks as the least corrupt country in Asia and among the least corrupt globally in Transparency International's Corruption Perceptions Index. The city-state has strict anti-corruption laws, efficient enforcement, high public sector salaries, and a strong rule of culture. Japan and India, while democratic, have higher levels of perceived corruption compared to Singapore's rigorous governance standards.

The Tata Institute of Fundamental Research (TIFR) was established in 1945 with support from the Sir Dorabji Tata Trust. It was founded by Dr. Homi Bhabha as a premier research institution in India. The institute began operations in June 1945 at the Indian Institute of Science campus in Bangalore before moving to Mumbai (then Bombay) later. It has been a pioneer in fundamental research in physics, mathematics, biology, and computer science.

BPL stands for Below Poverty Line, which is the official benchmark used in India to identify individuals and households lacking adequate income for basic needs. It determines eligibility for various government welfare schemes and subsidies designed to assist economically vulnerable sections of society. In consumer awareness contexts, understanding BPL helps citizens recognize their rights to government support and subsidized services.