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Sound travel as waves
Sound waves require a material medium to travel
Sound travel as straight lines
Sound travel faster in vaccum than in air
Which of the following symbiotic associations forms a lichen?
Which of the following tests is used for the diagnosis of ‘Colour-Blindness’ in people ?
Which of the following type of fire extinguisher is used for petroleum fire
Which of the following type of glass is used for making glass reinforced plastic
Which of the following type of reaction produces the most harmful radiation -
Which of the following variety of coal contains recognisable traces of the original plant material -
Which of the following vitamins is essential for bone and teeth formation?
Which of the following was the 1st antibiotic -
Which of the following was to be discovered first in the chromosphere of the sun?
Which of the given elements is found in max. percentage in the human body