The correct answer is option 4 i.e. 1964

India sent a strong contingent of 228 people including 119 athletes to the Tokyo Olympics.

A) India will be fighting for 85 medal events.

B) Tokyo has been selected as the host city for the olympics.

C) Japan will be hosting the Olympic Games for the Fourth time.

The correct answer is option 1 i.e. Vikram-S.

Vikram-S Rocket Launched By ISRO, India’s First Privately Developed Rocket.

A) Vikram-S was successfully launched into space from Sriharikota, Andhra Pradesh.

B) The rocket is carrying three customer payloads, as part of Skyroot Aerospace's Prarambh mission.

The correct answer is option 3 i.e 22nd May.

• The International Day for Biological Diversity (or World Biodiversity Day) is a United Nations-sanctioned international day for the promotion of biodiversity issues. It is currently held on May 22.
• The International Day for Biological Diversity falls within the scope of the UN Post-2015 Development Agenda's Sustainable Development Goals.

The correct answer is option 2 i.e. Ladakh

NTPC signed a MoU with Ladakh and LAHDC to set up Country's first Green Hydrogen Mobility Project.

A) Signing of MoU also marked inauguration of NTPCs first solar installations in Leh.

B) MoU will enable NTPC to help Ladakh develop a carbon free economy based on renewable sources and green hydrogen.

The correct answer is Option 1 i.e. Clark's method.

The hardness of water is due to the presence of soluble bicarbonates, chlorides, and sulfates of calcium and magnesium. Water which does not give lather with soap is hard water.

Remove Hardness of Water (Temporary)

By Boiling:

Soluble bicarbonates are converted into insoluble carbonates which are removed by filtration.

Reactions: Ca(HCO₃)₂ → ΔCalo₃↓ + H₂O + CO₂

⇒ Mg(HCO₃)₂ → ΔMgCO₃↓ + H₂O + CO₂

By Clarks Method:

Calcium hydroxide is Clark’s reagent. It removes the hardness of water by converting bicarbonates into carbonate.

Reaction: Ca(OH)₂ + Ca(HCO₃)₂ → 2CaCO₃↓ + 2H₂O

The correct answer is option 4 i.e Albert Einstein.

• Albert Einstein was awarded the Nobel Prize in Physics in 1921.

• He received the award not for his theory of relativity, but for his discovery of the law of the photoelectric effect, a fundamental step in the development of quantum theory.

• The photoelectric effect describes how light can eject electrons from a metal surface, showing that light behaves as particles (photons).

• This discovery revolutionized our understanding of light and energy.

Other Options:

• Ernest Rutherford: Known for discovering the atomic nucleus.

• Thomas Edison: Famous for inventions like the electric bulb and phonograph.

• Nikola Tesla: Pioneered alternating current and wireless energy systems.

The correct answer is option 2 i.e. RBI

RBI announces Retail Direct Gilt (RDG) account for hassle free trading in govt bonds for retail investors.

A) RBI said that retail investors can open an account with the central bank to start trading in govt banks.

B) Both Resident and Non Resident Retail investors will be eligible to invest in Govt securities.

The correct answer is Option 1 i.e. Krishna.

• Tungabhadra is in fact formed by the union of two rivers Tunga and Bhadra and hence the name.
• Both Tunga & Bhadra Rivers are originated on the eastern slopes of the Western Ghats.
• It flows through the state of Karnataka during most of its course, before flowing along the border between Telangana, Andhra Pradesh, and ultimately joining the Krishna River near Sangameswaram village in Kurnool district of Andhra Pradesh.
• The Krishna River finally ends in the Bay of Bengal.

The correct answer is option 2 i.e. Verghese Kurien.

• Theme: 20th anniversary of world Milk Day. 
• Day is celebrated to bring awareness and attention to the activities associated with dairy sector 

Note : June 1 marked as World Milk Day by FAO of UN.

The correct answer is option 4 i.e. Odisha

The Vice President receives the book "Urdu Poets and Writers-Gems of Deccan".

A) The book is authored by Senior Journalist Shri JS Iftekhar.

B) It is an anthology of prose and poetry that encapsulates the life and works of 51 outstanding poets and writers of Deccan Region.

C) Book traces the rich literacy and cultural traditions of Deccan.