Petrol, diesel, and cooking gas (LPG) are combustible fuels used to generate energy or heat. Vinegar is an acidic liquid used in cooking and cleaning, not a fuel.
72. What does solar panel capture to convert into electricity?
(a) Moonlight
(b) Sunlight
(c) Radiation
(d) Wave
Answer:
(b) Sunlight
Explanation:
Solar panels (photovoltaic panels) are specifically designed to absorb the sun’s rays (sunlight) and convert that solar energy directly into electricity.
73. Electricity generated from natural sources of energy is called?
(a) Light Energy
(b) Natural Energy
(c) Weak Energy
(d) Clean Energy
Answer:
(d) Clean Energy
Explanation:
Energy generated from naturally replenishing and non-polluting sources (like solar, wind, and hydro) is commonly referred to as “Clean Energy” or “Renewable Energy” because it does not produce greenhouse gas emissions.
74. Microbes are found in which of the following?
(a) Air
(b) Water
(c) Soil
(d) All of the above
Answer:
(d) All of the above
Explanation:
Microbes (microorganisms) are ubiquitous, meaning they can be found in virtually every environment on Earth, including floating in the air, swimming in water, and living in the soil.
75. Who among the following crossed oceans to collect ‘Black Pepper’ from India?
(a) Christopher Columbus
(b) Ibn Battuta
(c) Vasco da Gama
(d) Marco Polo
Answer:
(c) Vasco da Gama
Explanation:
The Portuguese explorer Vasco da Gama famously discovered the direct sea route to India in 1498, landing in Calicut, specifically driven by the lucrative European demand for Indian spices like black pepper.
