RRB ALP — Set 7

Correct Answer: D. Hertz

The SI unit of frequency is Hertz, which is defined as one cycle per second. It is named after the German physicist Heinrich Hertz. Frequency is inversely proportional to the time period of a wave.

Correct Answer: A. Qutubuddin Aibak

Qutubuddin Aibak founded the Slave Dynasty in 1206 after the death of Muhammad Ghori. He started the construction of the Qutub Minar in Delhi. He was also known as 'Lakh Baksh' due to his generosity.

Correct Answer: B. Sahara

The Sahara is the largest hot desert in the world, covering much of North Africa. It spans approximately 9.2 million square kilometers. The name Sahara is derived from the Arabic word for 'desert'.

Correct Answer: C. Article 360

Article 360 empowers the President to declare a financial emergency if the financial stability of India is threatened. This type of emergency has never been declared in India to date. It can remain in operation for an indefinite period until revoked.

Correct Answer: D. Karnam Malleswari

Karnam Malleswari won a bronze medal in weightlifting at the 2000 Sydney Olympics. She became the first Indian woman to achieve this historic feat. She was later honored with the Rajiv Gandhi Khel Ratna award.

Correct Answer: A. Carbon Dioxide

Carbon Dioxide is the primary greenhouse gas emitted through human activities like burning fossil fuels. It traps heat in the atmosphere, leading to the greenhouse effect. Trees help reduce its concentration by absorbing it during photosynthesis.

Correct Answer: B. Meerut

The revolt of 1857 officially began on May 10 in Meerut when sepoys refused to use greased cartridges. It quickly spread to Delhi and other parts of Northern India. Mangal Pandey is often credited with the first act of defiance in Barrackpore.

Correct Answer: C. Mars

Mars is called the Red Planet because of the iron oxide prevalent on its surface. It has two small moons named Phobos and Deimos. It is the fourth planet from the Sun in our solar system.

Correct Answer: D. 552

The maximum strength of the Lok Sabha is fixed at 552 members by the Constitution. Out of these, 530 represent states and 20 represent Union Territories. The 104th Amendment Act removed the provision for nominating Anglo-Indian members.

Correct Answer: A. C. Rajagopalachari

C. Rajagopalachari was one of the first three recipients of the Bharat Ratna in 1954. He was the last Governor-General of India. He shared the award that year with S. Radhakrishnan and C.V. Raman.

Correct Answer: C. NaCl

The chemical formula for common salt is NaCl, which stands for Sodium Chloride. It is an ionic compound formed by the reaction of sodium and chlorine. It is essential for human health and widely used as a preservative.

Correct Answer: C. Akbar

Buland Darwaza was built by Akbar in 1601 to commemorate his victory over Gujarat. It is the highest gateway in the world and serves as the entrance to the Jama Masjid. It is made of red and buff sandstone.

Correct Answer: B. Punjab

Punjab is known as the Land of Five Rivers because of the Jhelum, Chenab, Ravi, Beas, and Sutlej. The word 'Punjab' is derived from the Persian words 'Panj' (five) and 'Ab' (water). It is a major agricultural hub in India.

Correct Answer: C. Part III

Part III of the Indian Constitution contains Articles 12 to 35, which cover Fundamental Rights. It is often described as the 'Magna Carta' of India. These rights are justiciable and protected by the judiciary.

Correct Answer: A. February 28

National Science Day is celebrated on February 28 to mark the discovery of the Raman Effect. Sir C.V. Raman won the Nobel Prize in Physics for this discovery in 1930. The day aims to spread the importance of science among people.

Correct Answer: B. Equal and opposite reaction

Newton's Third Law states that for every action, there is an equal and opposite reaction. This principle explains how rockets propel themselves into space. Action and reaction forces always act on two different bodies.

Correct Answer: A. Lord Mountbatten

Lord Mountbatten served as the last Viceroy and the first Governor-General of independent India. He was succeeded by C. Rajagopalachari in 1948. He played a key role in the partition and transition of power.

Correct Answer: B. Stratosphere

The Ozone layer is located in the Stratosphere, roughly 15 to 35 km above Earth. It absorbs the majority of the Sun's harmful ultraviolet radiation. Depletion of this layer is caused by chemicals like chlorofluorocarbons (CFCs).

Correct Answer: C. Australia

The idea of the Concurrent List was borrowed from the Constitution of Australia. Both the Central and State governments can make laws on subjects listed here. In case of a conflict, the law made by the Central government prevails.

Correct Answer: D. Barometer

A barometer is a scientific instrument used to measure air pressure in a certain environment. Evangelista Torricelli is credited with inventing the first barometer in 1643. Rapid changes in pressure measured by a barometer indicate weather changes.

Correct Answer: A. Vitamin K

Vitamin K is a fat-soluble vitamin that plays a vital role in blood coagulation. Its deficiency can lead to excessive bleeding from minor wounds. Green leafy vegetables are an excellent source of this vitamin.

Correct Answer: B. Swami Dayananda Saraswati

Swami Dayananda Saraswati founded the Arya Samaj in Bombay to promote Vedic values. He gave the famous slogan 'Back to the Vedas'. He also wrote the influential book 'Satyarth Prakash'.

Correct Answer: C. Kunchikal Falls

Kunchikal Falls in Karnataka is the highest tiered waterfall in India with a height of 455 meters. It is formed by the Varahi River in the Shimoga district. Jog Falls is another famous waterfall located in the same state.

Correct Answer: D. The Speaker of Lok Sabha

The Speaker of the Lok Sabha presides over a joint sitting of the Lok Sabha and Rajya Sabha. In the Speaker's absence, the Deputy Speaker of the Lok Sabha takes over. A joint sitting is called by the President under Article 108.

Correct Answer: A. Dadabhai Naoroji

Dadabhai Naoroji is known as the 'Grand Old Man of India' for his contributions to the freedom struggle. He was the first Indian to be elected to the British House of Commons. He proposed the 'Drain of Wealth' theory.

Correct Answer: B. Plaster of Paris

Plaster of Paris is chemically known as Calcium Sulfate Hemihydrate ($CaSO_4 \cdot \frac{1}{2}H_2O$). It is obtained by heating gypsum to about 373 Kelvin. It is widely used in making casts for broken bones and decorative items.

Correct Answer: D. Harshavardhana

Hiuen Tsang visited India during the reign of King Harshavardhana in the 7th century. He spent several years studying at the Nalanda University in Bihar. His travelogue 'Si-Yu-Ki' provides a detailed account of the social conditions of that time.

Correct Answer: A. Kosi

The Kosi River is known as the 'Sorrow of Bihar' because of its frequent and devastating floods. It often changes its course, causing massive destruction to crops and property. It originates in Tibet and flows through Nepal before entering India.

Correct Answer: B. Palaeontology

Palaeontology is the scientific study of fossils to understand the history of life on Earth. It helps scientists determine the evolution of plants and animals over millions of years. This field combines biology with geology.

Correct Answer: D. Distance

A light-year is the distance that light travels in a vacuum in one year. It is equal to approximately 9.46 trillion kilometers. Astronomers use this unit to measure the vast distances between stars and galaxies.

Correct Answer: C. 1951

The First Five-Year Plan was launched in 1951 by Prime Minister Jawaharlal Nehru. It primarily focused on agricultural development to ensure food security. It was based on the Harrod-Domar model.

Correct Answer: D. Assam

Assam is the largest tea-producing state in India, accounting for more than half of the country's total output. The Brahmaputra Valley provides the ideal climate and soil for tea cultivation. India is one of the world's leading exporters of tea.

Correct Answer: A. Carbon Dioxide

Dry ice is the solid form of Carbon Dioxide, which sublimes directly into gas at room temperature. It is used as a cooling agent because it is colder than regular water ice. It is also used to create fog effects in theaters.

Correct Answer: B. Bankim Chandra Chattopadhyay

Vande Mataram was written by Bankim Chandra Chattopadhyay in his novel 'Anandamath'. It was first sung in a political context by Rabindranath Tagore in 1896. It was adopted as the national song of India in 1950.

Correct Answer: B. McMahon Line

The McMahon Line is the boundary line between the northeastern region of India and Tibet. It was proposed by Sir Henry McMahon at the Simla Convention in 1914. The Radcliffe Line separates India and Pakistan.

Correct Answer: C. 6

Currently, 6 Indian states have a bicameral legislature, meaning they have both a Legislative Assembly and a Legislative Council. These states are Andhra Pradesh, Bihar, Karnataka, Maharashtra, Telangana, and Uttar Pradesh. Most other states have only a unicameral system.

Correct Answer: A. Rabindranath Tagore

Rabindranath Tagore won the Nobel Prize in Literature in 1913 for his collection of poems 'Gitanjali'. He was the first non-European to win this prestigious award. He also composed the national anthems of India and Bangladesh.

Correct Answer: B. Liver

The liver is the largest gland in the human body and produces bile juice. Bile helps in the digestion and absorption of fats in the small intestine. It is stored in the gallbladder until needed for digestion.

Correct Answer: C. Bahadur Shah Zafar

Bahadur Shah Zafar was the last Mughal Emperor, who reigned until the 1857 revolt. He was exiled by the British to Rangoon (now Yangon) after the rebellion failed. His death in 1862 marked the formal end of the Mughal Empire.

Correct Answer: D. Violet

Violet light has the shortest wavelength and deviates the most when passing through a prism. Red light has the longest wavelength and deviates the least. This separation of light into its component colors is called dispersion.