1. Which scientist was the first to send electromagnetic waves to distant places?
[A]Thomas Edison
[B]Heinrich Hertz
[C]John Baird
[D]James Maxwell
2. The ability of the eye to see in the dark is due to the production of a purple pigment known as________________.
[A]Rhodopsin
[B]Carotene
[C]Retinene
[D]Lodopsin
3. Which of the following is the main constituent of malleable metal alloy Pewter?
[A]Tin
[B]Zinc
[C]Copper
[D]Lead
4. Which among the following is the lowest atomic number element without any stable isotopes?
[A]Molybdenum
[B]Ruthenium
[C]Technetium
[D]Niobium
5. While going towards the centre of the earth, the weight of a body shall _________________.
[A]Decrease
[B]Increase
[C]Remain constant
[D]Become infinite
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