Explanation

• The correct food chain, representing the flow of energy from producer to top predator, is:
• Grass (Producer): Produces energy through photosynthesis
• Grasshopper (Primary Consumer): Herbivore that eats grass
• Frog (Secondary Consumer): Carnivore that feeds on grasshoppers.
• Snake (Tertiary Consumer): Carnivore that feeds on frogs.
• Eagle (Apex Predator): Top predator that feeds on snakes

Last updated question by NS on 2 MAY 2026

Explanation

• The logical order of the medical sequence is: Patient, Diagnostic, Doctor, Treatment, Bill
• Patient: The person seeking care.
• Doctor: The professional providing care.
• Diagnostic: The doctor examines/diagnoses the patient.
• Treatment: The action taken to treat the illness.
• Bill: The final step for services rendered.

Last updated question by NS on 2 MAY 2026

Explanation

• Baghdad, the capital of Iraq,
• Founder: Caliph Abu Jafar al-Mansur
• Date: Construction began in 762 CE (145 AH).

Additional information

• Iraq, formerly known as Mesopotamia 
• Official languages: Arabic and Kurdish
• Currency is Iraqi Dinar.
• It is located in the continent of Asia.
• Primary Religion is Islam.

• Establishment

  • Independence declared: 3 October 1932

  • Republic declared: 14 July 1958

  • Current constitution: 15 October 2005

  
  

  Last updated question by NS on 2 MAY 2026

Explanation

• Marwan I the fourth Umayyad caliph
• Founder of the Marwanid line
• Father: Al-Hakam ibn Abi al-As
• Mother: Amina bint Alqama
• Reign: 684–685 CE

Additional information 

•  Marwan II (Marwan ibn Muhammad), he was the son of Muhammad ibn Marwan 

Last updated question by NS on 2 MAY 2026

Explanation

• Brass is an alloy mainly made of copper and zinc.
• In air, there are various gases including oxygen, carbon dioxide, moisture, and traces of hydrogen sulphide (H₂S).
• The gas responsible for discoloration of brass is hydrogen sulphide.
• Hydrogen sulphide reacts with copper present in brass to form copper sulphide.
• This copper sulphide forms a dark layer, causing brass to lose its shine and colour (tarnishing).

Last updated question by NS on 2 MAY 2026

Explanation

• Tetraethyl lead is primarily used as an antiknock agent
• Octane booster in gasoline and aviation fuel.
•  It prevents "knocking" (premature ignition of petrol vapors) in motors.
• Highly toxic and easily absorbed through the skin, lungs, and gastrointestinal tract

Last updated question by NS on 2 MAY 2026

Explanation

• The 25th Shanghai Cooperation Organization (SCO) Summit
• It was the largest summit in SCO's history
• Fifth time that China hosted the meeting
• Date: 31 August to 1 September 2025
• Host country: Tianjin, China

Last updated question by NS on 2 MAY 2026

Explanation

• Tuberculosis (TB) is considered one of the oldest and longest-lasting infectious diseases affecting humans
• The disease has been found in Egyptian mummies from 2400 BC.
• Infection dating back roughly 500,000 years in human ancestors,
• Confirmed 9,000-year-old skeletal cases

Last updated question by NS on 2 MAY 2026

Explanation

This is a distance problem using the Pythagorean theorem.

A person moves:

• 80 km North
• 60 km West

These form a right triangle.

Distance from starting point:

d=  √(80^2 + 60^2)

=√(6400 + 3600)

= √(10000) 

= 100 km

Last updated question by NS on 2 MAY 2026

Explanation

• The term “Golden Triangle” was coined by Marshall Green in 1971
• Local Name: Sop Ruak. 
• Continent: Southeast Asia
• Region: Myanmar, Thailand, Laos
• Situated at the Ruak and Mekong rivers in Chiang Rai Province
• Large, mountainous region of approximately 200,000 km2 (77,000 sq mi)
• The largest opium-producing areas of the world since the 1950s.

Last updated question by NS on 2 MAY 2026