Practice 94 Basics of Everyday Science multiple-choice questions with detailed answers and explanations. Ideal for RAS/RPSC exam preparation.
Q1. The Geminid meteor shower originates from which celestial body?
Explanation
Geminids originate from asteroid 3200 Phaethon, making them unique as most meteor showers are associated with comets.
Q2. Noise pollution is measured in:
Explanation
Noise pollution is measured in decibels (dB). Indian ambient noise standards: industrial area (75 dB day/70 dB night), commercial (65/55), residential (55/45), silence zone (50/40).
Q3. Nuclear Magnetic Resonance (NMR) spectroscopy is based on the property of:
Explanation
NMR detects nuclei with non-zero spin (¹H, ¹³C) when placed in a strong magnetic field and excited by radio waves. MRI is the medical application of NMR. NMR is essential in chemistry for molecular structure determination and in medicine for diagnostic imaging.
Q4. Rare earth elements are important because they are used in:
Explanation
Rare earth elements (17 elements) are critical for permanent magnets (wind turbines, EVs), electronics (smartphones, LEDs), defence (guided missiles, jet engines), and green energy technologies.
Q5. Fly ash can be used to manufacture which building material that replaces conventional clay bricks?
Explanation
Fly ash bricks are made by mixing fly ash, cement, sand, and water. They are lighter, uniform, stronger, and cheaper than clay bricks. They don't require kiln firing (saving topsoil and energy). MoEFCC mandates fly ash brick use within 300 km of thermal plants. Portland Pozzolana Cement (PPC) also uses fly ash.
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Q6. BIS (Bureau of Indian Standards) Hallmark on gold jewellery certifies:
Q7. Fuel cell technology generates electricity through:
Q8. Photovoltaic cells convert:
Q9. Nitrogen fixation in soil is primarily done by:
Q10. The 'Prototype Fast Breeder Reactor (PFBR)' at Kalpakkam uses which fuel?
Q11. India's thorium reserves are among the largest in the world. Thorium is primarily found in which mineral in India?
Q12. Carbon allotropes include all of the following EXCEPT:
Q13. India's Bhopal Gas Tragedy (1984) involved leakage of:
Q14. Fibre optics communication was a contribution of:
Q15. Which gas is most abundant in the Earth's atmosphere?
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