latests
The chemical formula of ozone is?
A) O2
B) O3
C) CO2
D) NO2
Ozone’s formula is O3, consisting of three oxygen atoms, playing a vital role in absorbing harmful UV radiation in Earth’s stratosphere.
latests
A)
Michelangelo
B)
Leonardo da Vinci
C)
Raphael
D)
Donatello
Michelangelo painted the Sistine Chapel ceiling (1508–1512), a masterpiece of Renaissance art depicting biblical scenes in fresco.
latests
Lead's chemical symbol is Pb, from its Latin name 'plumbum,' reflecting historic use in pipes and construction.
latests
A)
Charles Dickens
B)
William Shakespeare
C)
Jane Austen
D)
Mark Twain
Shakespeare wrote Hamlet, one of his greatest tragedies.
latests
A)
France
B)
Britain
C)
Russia
D)
Japan
The Opium Wars (1839–42, 1856–60) were conflicts between China and Britain over opium trade, leading to unequal treaties.
latests
A)
Charles Darwin
B)
Robert Hooke
C)
Antonie van Leeuwenhoek
D)
Louis Pasteur
Robert Hooke used a microscope in 1665 to describe cork structures as “cells,” laying the foundation for modern cell biology.
latests
A)
Free Movement
B)
Military Alliance
C)
Trade Union
D)
Tax Harmonization
The Schengen Agreement allows passport-free travel across many European countries, facilitating movement and integration in the EU.
latests
A)
CO2
B)
Nitrogen Oxides
C)
CFCs
D)
Methane
Chlorofluorocarbons (CFCs) destroy stratospheric ozone, allowing harmful UV radiation to reach Earth, first observed in Antarctica.
latests
A)
Saturn
B)
Neptune
C)
Jupiter
D)
Uranus
Jupiter is the largest planet, a gas giant with strong magnetic fields and dozens of moons, dominating the outer Solar System.
latests
A)
Spain and France
B)
Spain and England
C)
Spain and Portugal
D)
Portugal and France
The Treaty of Tordesillas split new overseas territories between Spain and Portugal, mediated by the Pope to avoid conflict.
latests
A)
Han Wudi
B)
Qin Shi Huang
C)
Liu Bang
D)
Sun Yat-sen
Qin Shi Huang (221 BCE) unified China, standardized writing, and began construction of the Great Wall.
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