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Q. The element used in the manufacture of safety matches is
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Q. Which of the properties of the elements is a whole number ?
Q. Biofertilizers convert nitrogen to _______.
Q. The fundamental particles present in equal numbers in neutral atoms are
Q. The energy obtained per gram intake is highest from
Q. All isotopes of the same element have
Q. The purest form of water is
Q. Which of the following is a monoatomic gas?
Q. The refrigerant commonly used for domestic refrigerators is
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