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Q. Who was the inventor of positron?
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Q. Which of the following cell organelle found only in plant cell but not in animal cell ?
Q. The mirror used in search light is –
Q. Denatured spirit is ethanol mixed with
Q. Hydrogen was discovered by-
Q. The power house of energy in cells is
Q. Microphone is a device which transforms the
Q. The energy emitted by the Sun is due to
Q. Atoms of same element having different mass numbers are called__________
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