RRB Group D — Set 18
40 questions
Who is credited with the discovery of the neutron?
Correct Answer: A. James Chadwick
James Chadwick discovered the neutron in 1932. This subatomic particle is located in the nucleus and carries no electric charge. His discovery was essential for understanding atomic mass and nuclear fission.
In which modern-day Indian state is the ancient port city of Lothal located?
Correct Answer: B. Gujarat
Lothal was a prominent city of the Indus Valley Civilization located in Gujarat. it is famous for having the world's earliest known artificial dockyard. The site provided evidence of ancient maritime trade with Mesopotamia.
Which component of human blood is primarily responsible for clotting?
Correct Answer: C. Platelets
Platelets are small cell fragments that help the blood to clot and stop bleeding. They are also scientifically referred to as thrombocytes. A significant decrease in platelet count can lead to internal bleeding risks.
What is the full form of the taxation term 'GST'?
Correct Answer: D. Goods and Services Tax
GST stands for Goods and Services Tax. It is a comprehensive indirect tax levied on the manufacture and sale of goods and services. It was officially implemented across India on July 1, 2017.
Who was the founder of the 'Arya Samaj'?
Correct Answer: A. Swami Dayanand Saraswati
Swami Dayanand Saraswati founded the Arya Samaj in 1875 in Bombay. He promoted the slogan 'Back to the Vedas' to reform Hindu society. He was also a strong advocate for female education and social equality.
Which planet in our solar system is commonly known as the 'Red Planet'?
Correct Answer: B. Mars
Mars is known as the Red Planet due to the prevalence of iron oxide on its surface. It is the fourth planet from the Sun and has two small moons. Scientists study Mars extensively to look for signs of past microbial life.
What is the chemical name of common table salt?
Correct Answer: C. Sodium Chloride
The chemical name for common salt used in food is Sodium Chloride. Its chemical formula is represented as NaCl. It is an ionic compound consisting of sodium and chloride ions.
Who presided over the first session of the Indian National Congress in 1885?
Correct Answer: D. W.C. Bonnerjee
Womesh Chandra Bonnerjee was the first president of the Indian National Congress. The first session was held in Bombay with 72 delegates in attendance. The organization was formed to provide a platform for civic and political dialogue.
The Sunderbans Delta is primarily formed by the confluence of which two rivers?
Correct Answer: A. Ganga and Brahmaputra
The Sunderbans Delta is created by the combined flow of the Ganga and Brahmaputra rivers. It is the largest river delta in the world and spans across India and Bangladesh. The region is famous for its vast mangrove forests and Royal Bengal Tigers.
In which year did the First World War begin?
Correct Answer: B. 1914
The First World War officially began in July 1914. It was triggered by the assassination of Archduke Franz Ferdinand of Austria. The global conflict lasted for four years until the armistice in 1918.
The atomic number of an element is determined by the number of which particles in its atom?
Correct Answer: C. Protons
The atomic number is equal to the number of protons found in the nucleus of an atom. It uniquely identifies a chemical element in the periodic table. In a neutral atom, the number of protons also equals the number of electrons.
Article 324 of the Indian Constitution is related to which of the following?
Correct Answer: D. Election Commission
Article 324 provides for the establishment of the Election Commission of India. It grants the commission the power of superintendence, direction, and control of elections. This constitutional body ensures the conduct of free and fair elections.
What is the SI unit of mechanical and electrical power?
Correct Answer: A. Watt
The Watt is the standard SI unit used to measure power. One watt is defined as the rate of energy transfer of one joule per second. It is named after the Scottish inventor James Watt.
In which state is the Gir National Park, famous for Asiatic Lions, located?
Correct Answer: B. Gujarat
Gir National Park is located in the state of Gujarat. It is the only natural habitat in the world where Asiatic lions are found. The sanctuary was established in 1965 to protect the dwindling lion population.
Who is known as the 'Father of the Indian Constitution'?
Correct Answer: C. B.R. Ambedkar
Dr. B.R. Ambedkar was the chairman of the Drafting Committee of the Constitution. He played a pivotal role in framing the fundamental rights and legal safeguards of India. His contributions earned him the title of the Chief Architect of the Constitution.
Which vitamin is essential for the process of blood coagulation?
Correct Answer: D. Vitamin K
Vitamin K is a fat-soluble vitamin required for the synthesis of proteins needed for blood clotting. Without sufficient Vitamin K, the body cannot stop bleeding effectively. It is naturally found in leafy green vegetables.
Which gas is the most abundant in the Earth's atmosphere?
Correct Answer: A. Nitrogen
Nitrogen makes up approximately 78% of the Earth's atmosphere by volume. It is a colorless and odorless gas that is essential for all living organisms. Oxygen is the second most abundant gas at about 21%.
Who was the first Governor-General of independent India?
Correct Answer: B. Lord Mountbatten
Lord Mountbatten served as the last Viceroy of British India and the first Governor-General of independent India. He oversaw the transition of power from British rule to Indian self-governance. He was later succeeded by C. Rajagopalachari.
Which instrument is specifically used to measure the humidity of the air?
Correct Answer: C. Hygrometer
A hygrometer is a weather instrument used to measure the amount of water vapor in the atmosphere. It helps in predicting weather patterns and monitoring indoor air quality. Relative humidity is usually expressed as a percentage.
In which year was the Battle of Buxar fought?
Correct Answer: D. 1764
The Battle of Buxar was fought on October 22, 1764. It was contested between the British East India Company and a combined alliance of Indian rulers. The British victory established their firm control over the Bengal region.
Which organic acid is primarily found in vinegar?
Correct Answer: A. Acetic acid
Acetic acid gives vinegar its characteristic sour taste and pungent smell. It is produced through the fermentation of ethanol by acetic acid bacteria. Household vinegar typically contains 5% to 8% acetic acid.
Who served as the first Deputy Prime Minister of India?
Correct Answer: B. Sardar Vallabhbhai Patel
Sardar Vallabhbhai Patel was the first Deputy Prime Minister and Home Minister of independent India. He is widely known as the 'Iron Man of India' for integrating princely states. His birth anniversary is celebrated as National Unity Day.
What is the average lifespan of a human red blood cell?
Correct Answer: C. 120 days
Red blood cells circulate in the human body for an average of about 120 days. After this period, they are broken down and recycled by the spleen and liver. New red blood cells are continuously produced in the bone marrow.
Which peak is the highest point of the Aravalli mountain range?
Correct Answer: D. Guru Shikhar
Guru Shikhar is the highest peak of the Aravalli Range, located in Rajasthan. It stands at an elevation of approximately 1,722 meters above sea level. It is situated in the Mount Abu region.
Who conferred the title 'Mahatma' upon Mohandas Karamchand Gandhi?
Correct Answer: A. Rabindranath Tagore
Rabindranath Tagore was the first person to address Gandhi as 'Mahatma'. In return, Gandhi referred to Tagore as 'Gurudev'. This exchange of titles reflected the deep mutual respect between the two leaders.
What is the hardest naturally occurring substance found on Earth?
Correct Answer: B. Diamond
Diamond is an allotrope of carbon and is the hardest natural material known. Its extreme hardness is due to the strong covalent bonds between its atoms. It is widely used in both jewelry and industrial cutting tools.
The traditional folk dance 'Ghoomar' is associated with which Indian state?
Correct Answer: C. Rajasthan
Ghoomar is a traditional folk dance performed by women in Rajasthan. It involves graceful twirling movements in colorful flowing skirts. The dance is usually performed during festive occasions and weddings.
Which chemical element is used on the striking surface of safety matchboxes?
Correct Answer: D. Red Phosphorus
Red phosphorus is used in the striking strip of safety matchboxes to initiate fire. It is safer to handle than white phosphorus because it is less reactive. When the match head is rubbed against it, friction creates enough heat to ignite the match.
What is the SI unit of Force?
Correct Answer: A. Newton
The Newton is the SI unit of force, named after the physicist Isaac Newton. One Newton is the force required to accelerate one kilogram of mass at one meter per second squared. It is a vector quantity having both magnitude and direction.
The concept of Fundamental Rights in the Indian Constitution was borrowed from which country?
Correct Answer: B. USA
The Indian Constitution's Fundamental Rights were inspired by the Bill of Rights of the USA. These rights are protected and guaranteed by the Constitution to all citizens. They are considered essential for the moral and intellectual development of individuals.
Which is the largest gland in the human body?
Correct Answer: C. Liver
The liver is the largest internal organ and gland in the human body. It performs over 500 vital functions, including detoxification and protein synthesis. It also produces bile, which is necessary for the digestion of fats.
What is the capital city of Japan?
Correct Answer: D. Tokyo
Tokyo is the capital and largest city of Japan. It is one of the world's most populous metropolitan areas and a major financial hub. The city was known as Edo until it became the capital in 1868.
What is the approximate speed of light in a vacuum?
Correct Answer: A. 3 x 10^8 m/s
The speed of light in a vacuum is approximately 3 × 10⁸ m/s (300,000,000 meters per second or 300,000 km/s). This universal constant, denoted as 'c', was precisely measured as 299,792,458 m/s. The speed of light at 3 × 10⁸ m/s is the maximum speed at which information or matter can travel in the universe. Albert Einstein's theory of special relativity is based on the constancy of the speed of light.
Who was the founder of the Mamluk (Slave) Dynasty in India?
Correct Answer: B. Qutb-ud-din Aibak
Qutb-ud-din Aibak founded the Mamluk Dynasty in 1206. He was a former slave of Muhammad Ghori who rose to become a ruler. He is also known for starting the construction of the Qutub Minar in Delhi.
Which chemical element is widely used as a semiconductor in solar cells?
Correct Answer: C. Silicon
Silicon is the most commonly used material in the manufacturing of solar panels. It is a semiconductor that can effectively convert sunlight into electrical energy. Silicon is also the second most abundant element in the Earth's crust.
Who is the author of the ancient Indian political treatise 'Arthashastra'?
Correct Answer: D. Chanakya
Chanakya, also known as Kautilya, wrote the Arthashastra during the Mauryan period. The book covers subjects like statecraft, economic policy, and military strategy. He was the chief advisor to Emperor Chandragupta Maurya.
What is the approximate percentage of Oxygen in the Earth's atmosphere?
Correct Answer: A. 21%
Oxygen makes up about 21% of the Earth's atmosphere. It is vital for the survival of aerobic organisms through the process of respiration. Most of the atmospheric oxygen is produced by plants during photosynthesis.
Which physical process is used to separate cream from milk?
Correct Answer: B. Centrifugation
Centrifugation is a technique used to separate particles from a solution according to their size and density. When milk is rotated at high speed, the lighter cream particles separate from the denser milk. This process is widely used in the dairy industry.
Which is the smallest planet in our solar system?
Correct Answer: C. Mercury
Mercury is the smallest planet in the solar system and the closest to the Sun. It has no moons and very little atmosphere. Due to its proximity to the Sun, it experiences extreme temperature variations.
What is the full form of 'RAM' in computer terminology?
Correct Answer: D. Random Access Memory
RAM stands for Random Access Memory. It is a type of computer memory that can be accessed randomly and serves as temporary storage. Data stored in RAM is lost when the computer's power is turned off.