General Science - Single MCQs (Page 43)

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Q421. Which one of the following element is used in solar cells?...Q422. Stephen Hawking is known for his extensive work in the field of?...Q423. In an ecosystem, green plants are?...Q424. Which of the following Vitamins is essential for blood clotting?...Q425. The ginger is a?...Q426. At what temperature is the density of water maximum?...Q427. The antibiotic penicillin is produced by?...Q428. Lightening cause rainfall because?...Q429. What is the unit for measuring the pitch or frequency of sound ?...Q430. Brass gets discoloured in air due to the presence of which gas in air?...