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Q. Soap is prepared by boiling caustic soda with
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Q. Which layer protects earth from harmful rays of the Sun?
Q. Of the following commonly used materials, the one that is not an alloy is
Q. Which of the following is not a chemical change?
Q. Which of the following gas is used in the Yellowish lamps used as street Lights?
Q. Helium gas is filled in ballons as
Q. What determines the colour of a star?
Q. The chemical formula of the laughing gas is
Q. Who among ghr following laid the foundation of nuclear science in india
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