The correct answer is 7 April 1948.

Key Points

• World Health Day is celebrated on 7 April every year.
• It was decided to celebrate World Health Day in 1948 in the First Health Assembly of the World Health Organization.
• It was first celebrated in 1950.
• It is one of the 11 official global health campaigns announced by WHO.

Additional Information

• World Health Organization:
  • Founded – April 7, 1948
  • Headquarters – Geneva, Switzerland
  • Parent Organization – United Nations Economic and Social Council
  • Objective – Highest possible health level for all human beings
  • Publication – World Health Report
  • Regional offices – Brazzaville (Congo), Copenhagen (Denmark), New Delhi (India), Cairo (Egypt), Manila (The Philippines), Washington D.C. (US)

The Correct Answer is Option 4 i.e At topmost position.

Key Points

• When an object (ball) is thrown upwards its velocity will decrease as it goes upward due to deceleration by gravity.
• So its kinetic energy will decrease as it moves upward. But its potential energy will increase as it moves upward.
• Kinetic energy is zero and potential energy is maximum when the object reaches the topmost point.
• Kinetic energy is maximum just before striking the ground.

The correct answer is Salim Ali.

Key Points

• Salim Ali, one of the greatest ornithologists and naturalists of all time, is also known as the “birdman of India”.
• He was born in Mumbai on 12th November in 1896, Salim Moizuddin Abdul Ali was not only a bird lover but also a naturalist.
• He was the first to conduct a systematic birds survey across India and wrote several bird book that popularized ornithology in India 
• His research work is considered highly influential in the development of ornithology.
• An unlikely parliamentarian, he was nominated to the Rajya Sabha in 1985.
• ​Dr Salim Ali passed away in 1987 at the age of 91.

Additional Information

• The Dr Salim Ali Bird Sanctuary is located on the western tip of the Island of Chorao along the Mandovi River in Goa. 
• The sanctuary is an estuarine mangrove habitat.
• The sanctuary is host to little bittern, black bittern, red knot, jack snipe, pied avocet, striated heron, western reef heron, mudskippers, fiddler crabs, etc.

The correct answer is Comptroller and Auditor General.

Key Points

• Constitutional provisions for CAG:
  • Article 148: Comptroller and Auditor-General of India.
  • Article 149: Duties and Powers of the Comptroller and Auditor-General.
  • Article 150: Form of Accounts of The Union and of The States.
  • Article 151: Audit Reports.

Important Points

• Comptroller and Auditor-General of India (CAG):
  • CAG has been given an independent position under the constitution of India, which is the instrument that ensures and promotes accountability of the executive to parliament.
  • This office started functioning in 1858, and the first Auditor General was appointed in 1860.
  • The CAG of India is an independent constitutional authority that is neither part of the legislature nor executive, though appointed by the President under his hand and seal and can be removed only through a motion of impeachment.
  • Girish Chandra Murmu is the 14th and the current Comptroller and Auditor General of India.

The correct answer is Mahatma Gandhi.

Key Points

• The UN's International Day of Nonviolence is marked every year on October 2, the birth anniversary of Mahatma Gandhi.​
• The United Nations General Assembly approved a resolution on June 15, 2007, to observe 2 October as this day.

• The principle of non-violence, also known as non-violent resistance, rejects the use of physical violence in order to achieve social or political change.

Additional Information

• Rajendra Prasad
  • Rajendra Prasad was the longest-serving President of India (1950 to 1962).
  • Rajendra Prasad was elected as the first President of India on 24th January 1950
• ​Subhas Chandra Bose
  • Subhas Chandra Bose was born on 23rd January 1897 in Cuttack, Orissa.
  • One of the greatest freedom fighters of India popularly known as Netaji.
  • Subhas Chandra Bose was elected twice as the president of the INC in the Haripura session in 1938 and the Tripuri session in 1939.
  • Subhas Chandra Bose founded the All India Forward Bloc on 22nd June 1939.
  • Subhash Chandra Bose is believed to have died from the 3rd-degree burn from a plane crash in Taiwan on 18th August 1945.
  • A few Books written by Subhas Chandra bose are:
    • An Indian Pilgrim
    • Words of Freedom: Ideas of a Nation: Subhash Chandra Bose
    • Jaruri Kichu Lekha
    • The Indian Struggle
    • Famous speeches and letters of Subhas Chandra Bose
    • Letters To Emilie Schenkl
• ​​Jawaharlal Nehru​
  • Jawaharlal Nehru was the first Prime Minister of India.
  • He is the Prime Minister who has had the longest term in office.
  • He served as the prime minister of India from 15th August 1947 to 1964.
  • He is the architect of the Preamble of the Indian constitution.
  • He was the Prime Minister of India during the Indo-China war in 1962.
  • He served as the first chairman of the planning commission of India.
  • He was honored with the Bharat Ratna in 1955.
  • The name Panchayati raj was given by Jawaharlal Nehru.
  • National Herald is a newspaper started by Jawaharlal Nehru.
  • Shantivan is the cremation ground of Jawaharlal Nehru.

The correct answer is Tomato - Oxalic acid.

Key Points

• Oxalic acid is a chemical compound that occurs naturally in almost every plant to some degree, including fruit, vegetable and grain plants. 
• Tomato contains more than 10 types of acids such as citric acid, malic acid, ascorbic acid, and oxalic acid etc. 
• The oxalic acid content of tomatoes is about 50 mg per 100 g serving. 
• Very ripe tomatoes generally contain higher oxalate amounts than less mature fruit.

Additional Information

• Some natural sources of acid:

The correct answer is Kolkata.

Key Points

• Indian Museum, Kolkata is the largest Museum in India.
• It is also referred to as the "Imperial Museum at Calcutta".
• It has collections of Antiques, Armour, and Ornaments, fossils, skeletons, mummies and Mughal paintings.
• It was founded by the Asiatic Society of Bengal in Kolkata.
• It is under the Ministry of Culture, Government of India.
• The Museum Directorate has eight coordinating services units.
• These are Education, Preservation, Publication, Presentation, Photography, Medical, Modelling, and Library.
• Established in 1814.
• It has a collection of 102,646 artifacts.

The correct answer is option 4.

In News

• The Hindu: Chandrayaan-3 spacecraft reaches launch port ahead of next month’s launch.

Key Points

Chandrayaan-3 Mission:

• Chandrayaan-3 is a follow-on mission to Chandrayaan-2 to demonstrate end-to-end capability in safe landing and roving on the lunar surface.
• It consists of Lander and Rover configuration. It will be launched by LVM3 from SDSC SHAR, Sriharikota.
• The propulsion module will carry the lander and rover configuration till 100 km lunar orbit.
• The propulsion module has Spectro-polarimetry of Habitable Planet Earth (SHAPE) payload to study the Earth's spectral and Polari metric measurements the lunar orbit.

The mission objectives of Chandrayaan-3 are:

• To demonstrate a Safe and Soft Landing on Lunar Surface.
• To demonstrate Rover roving on the moon.
• To conduct in-situ scientific experiments.
• Hence option 4 is correct.

The correct answer is Convex mirrors.

• Convex mirrors are used as rearview mirrors.

Additional Information

• A plane mirror always forms a virtual image.
  • The image and object are the same distance from a flat mirror, the image size is the same as the object size, and the image is upright.
  • Plane mirrors are used to see reflections of objects.
  • A cylindrical mirror can produce images that are flipped upside down and images that are not reversed.
    • The image depends on the orientation of the mirror and the distance between the object and the mirror.

Important Points

The correct answer is Hydrogenation.

Key Points

• Hydrogenation
  • ​Molecular hydrogen (H₂) and another compound or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst like nickel, palladium, or platinum.
  • Typically, the procedure is used to reduce or saturate organic compounds.
  • The process of hydrogenation typically involves adding pairs of hydrogen atoms to a molecule, typically an alkene.
  • In order for the reaction to be utilized, catalysts are required; At extremely high temperatures, non-catalytic hydrogenation can only occur.
  • Double and triple bonds in hydrocarbons are broken down by hydrogenation.

Additional Information

• Oxidation
  • ​Oxidation is defined as the addition of oxygen to any electronegative element or the removal of hydrogen or any electropositive element, according to classical or earlier definitions.
  • The process by which an atom or ion loses one or more electrons is known as oxidation.
• Crystallization
  • ​The formation of a solid in which the atoms or molecules are highly organized into a structure known as a crystal is known as crystallization.
  • Precipitation from a solution, freezing, and, less frequently, direct deposition from a gas is some of the methods by which crystals are formed.
  • The temperature, air pressure, and, in the case of liquid crystals, the duration of fluid evaporation all play a significant role in determining the characteristics of the final crystal.
• Distillation
  • ​The selective boiling and subsequent condensation of a component in a liquid mixture is referred to as distillation.
  • It is a method of separation that can be used to either make a component in the mixture more concentrated or to extract (almost) pure components from the mixture.
  • By forcing one of the components in the liquid mixture into a gaseous state, the distillation process takes advantage of the differences in the components' boiling points.
  • It is essential to keep in mind that distillation is a physical separation process and is not a chemical reaction.